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708.2949 | Can Extra Mixing in RGB and AGB Stars Be Attributed to Magnetic
Mechanisms? | It is known that there must be some weak form of transport (called cool
bottom processing, or CBP) acting in low mass RGB and AGB stars, adding nuclei,
newly produced near the hydrogen-burning shell, to the convective envelope. We
assume that this extra-mixing originates in a stellar dynamo operated by the
differential rotation below the envelope, maintaining toroidal magnetic fields
near the hydrogen-burning shell. We use a phenomenological approach to the
buoyancy of magnetic flux tubes, assuming that they induce matter circulation
as needed by CBP models. This establishes requirements on the fields necessary
to transport material from zones where some nuclear burning takes place,
through the radiative layer, and into the convective envelope. Magnetic field
strengths are determined by the transport rates needed by CBP for the model
stellar structure of a star of initially 1.5 solar mass, in both the AGB and
RGB phases. The field required for the AGB star in the processing zone is B_0 ~
5x10^6 G; at the base of the convective envelope this yields an intensity B_E <
10^4 G (approximately). For the RGB case, B_0 ~ 5x10^4 to 4x10^5 G, and the
corresponding B_E are ~ 450 to 3500 G. These results are consistent with
existing observations on AGB stars. They also hint at the basis for high field
sources in some planetary nebulae and the very large fields found in some white
dwarfs. It is concluded that transport by magnetic buoyancy should be
considered as a possible mechanism for extra mixing through the radiative zone,
as is required by both stellar observations and the extensive isotopic data on
circumstellar condensates found in meteorites.
| astro-ph | it is known that there must be some weak form of transport called cool bottom processing or cbp acting in low mass rgb and agb stars adding nuclei newly produced near the hydrogenburning shell to the convective envelope we assume that this extramixing originates in a stellar dynamo operated by the differential rotation below the envelope maintaining toroidal magnetic fields near the hydrogenburning shell we use a phenomenological approach to the buoyancy of magnetic flux tubes assuming that they induce matter circulation as needed by cbp models this establishes requirements on the fields necessary to transport material from zones where some nuclear burning takes place through the radiative layer and into the convective envelope magnetic field strengths are determined by the transport rates needed by cbp for the model stellar structure of a star of initially 15 solar mass in both the agb and rgb phases the field required for the agb star in the processing zone is b_0 5x106 g at the base of the convective envelope this yields an intensity b_e 104 g approximately for the rgb case b_0 5x104 to 4x105 g and the corresponding b_e are 450 to 3500 g these results are consistent with existing observations on agb stars they also hint at the basis for high field sources in some planetary nebulae and the very large fields found in some white dwarfs it is concluded that transport by magnetic buoyancy should be considered as a possible mechanism for extra mixing through the radiative zone as is required by both stellar observations and the extensive isotopic data on circumstellar condensates found in meteorites | [['it', 'is', 'known', 'that', 'there', 'must', 'be', 'some', 'weak', 'form', 'of', 'transport', 'called', 'cool', 'bottom', 'processing', 'or', 'cbp', 'acting', 'in', 'low', 'mass', 'rgb', 'and', 'agb', 'stars', 'adding', 'nuclei', 'newly', 'produced', 'near', 'the', 'hydrogenburning', 'shell', 'to', 'the', 'convective', 'envelope', 'we', 'assume', 'that', 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708.295 | The D^4 R^4 term in type IIB string theory on T^2 and U-duality | We propose a manifestly U-duality invariant modular form for the D^4 R^4
interaction in type IIB string theory compactified on T^2. It receives
perturbative contributions upto two loops, and non-perturbative contributions
from D-instantons and (p,q) string instantons wrapping T^2. We provide evidence
for this modular form by showing that the coefficients at tree level and at one
loop precisely match those obtained using string perturbation theory. Using
duality, parts of the perturbative amplitude are also shown to match exactly
the results obtained from eleven dimensional supergravity compactified on T^3
at one loop. Decompactifying the theory to nine dimensions, we obtain a
U-duality invariant modular form, whose coefficients at tree level and at one
loop agree with string perturbation theory.
| hep-th | we propose a manifestly uduality invariant modular form for the d4 r4 interaction in type iib string theory compactified on t2 it receives perturbative contributions upto two loops and nonperturbative contributions from dinstantons and pq string instantons wrapping t2 we provide evidence for this modular form by showing that the coefficients at tree level and at one loop precisely match those obtained using string perturbation theory using duality parts of the perturbative amplitude are also shown to match exactly the results obtained from eleven dimensional supergravity compactified on t3 at one loop decompactifying the theory to nine dimensions we obtain a uduality invariant modular form whose coefficients at tree level and at one loop agree with string perturbation theory | [['we', 'propose', 'a', 'manifestly', 'uduality', 'invariant', 'modular', 'form', 'for', 'the', 'd4', 'r4', 'interaction', 'in', 'type', 'iib', 'string', 'theory', 'compactified', 'on', 't2', 'it', 'receives', 'perturbative', 'contributions', 'upto', 'two', 'loops', 'and', 'nonperturbative', 'contributions', 'from', 'dinstantons', 'and', 'pq', 'string', 'instantons', 'wrapping', 't2', 'we', 'provide', 'evidence', 'for', 'this', 'modular', 'form', 'by', 'showing', 'that', 'the', 'coefficients', 'at', 'tree', 'level', 'and', 'at', 'one', 'loop', 'precisely', 'match', 'those', 'obtained', 'using', 'string', 'perturbation', 'theory', 'using', 'duality', 'parts', 'of', 'the', 'perturbative', 'amplitude', 'are', 'also', 'shown', 'to', 'match', 'exactly', 'the', 'results', 'obtained', 'from', 'eleven', 'dimensional', 'supergravity', 'compactified', 'on', 't3', 'at', 'one', 'loop', 'decompactifying', 'the', 'theory', 'to', 'nine', 'dimensions', 'we', 'obtain', 'a', 'uduality', 'invariant', 'modular', 'form', 'whose', 'coefficients', 'at', 'tree', 'level', 'and', 'at', 'one', 'loop', 'agree', 'with', 'string', 'perturbation', 'theory']] | [-0.14644930697488404, 0.15309004789265265, -0.09404968727426995, 0.14764543595633806, -0.05466948089604618, -0.20675526104648323, 0.014818930641372352, 0.2877228416799873, -0.17948636911934665, -0.24540700281367583, 0.08686837086066634, -0.3235727698941316, -0.18447837540136353, 0.14071461617821404, -0.02304032731394307, -0.004855291182253541, -0.0076329990607068065, 0.1267906450805892, -0.08007351800353274, -0.2984400048476307, 0.369757247259136, -0.027231828344813667, 0.24162809259626045, 0.022921525164969078, 0.11343570763417402, -0.015487781165269431, -0.02579134748074688, 0.005794476036827604, -0.1264382541637492, 0.13770333553777866, 0.24910501736272989, 0.005678114031261506, 0.013860913964004075, -0.4642521163307819, -0.17145250691100955, -0.01750676240772009, 0.17019842028473073, 0.1397075619638561, 0.040656303515116184, -0.23240775191577293, 0.07118213538690901, -0.16072234149803133, -0.1770165795577737, -0.1324595569225983, 0.008200833965249421, -0.16833779906087062, -0.24769538947764566, 0.0580563130805625, -0.047616675981328266, 0.0485335894656845, -0.025103860006456365, -0.09287332083752081, -0.017804145002972428, 0.10736230346413345, 0.11353906957010011, 0.13245977807502426, 0.11297206720141616, -0.14031246626054322, -0.15238592066183812, 0.31743164376175703, -0.09400533147531898, -0.17976850111178366, 0.1111599119074893, -0.17122451474248362, -0.2546601730571011, 0.1397115706520922, 0.06589574170564967, 0.12776897216123773, -0.10857451586600612, 0.21710692836605638, 0.01434596995294814, 0.13545313896024364, 0.18777141277482653, 0.038459701702280455, 0.23067204412385947, 0.0471882796807199, -0.009999601217867228, 0.1058799424580447, -0.006638589862953214, -0.14303023799346024, -0.45216218213073345, -0.01978008637689993, -0.0615539855261122, 0.13007338841625748, -0.1682278381326987, -0.18645222642152773, 0.3527633105619897, 0.04003264637372433, 0.19213179633522234, 0.14344620945699074, 0.21160556534070427, 0.11586317001301952, 0.11789191116876274, 0.0780342411476837, 0.1919861383258733, 0.12748045516356887, 0.02057739975275237, -0.22334878921054868, -0.15476434815189793, 0.26939366812653404] |
708.2951 | QCD corrections to t\bar t b \bar b productions via photon-photon
collisions at linear colliders | We calculated the complete next-to-leading order(NLO) QCD corrections to the
$t\bar t b \bar b$ production process at a $\gamma \gamma$ collider in the
standard model(SM). The calculation of the one-loop QCD correction includes the
evaluations of the hexagon and pentagon amplitudes. We studied the NLO QCD
corrected total cross section, the distributions of transverse momenta of final
top- and bottom-quark states, and the dependence of the cross section on
renormalization scale $\mu$. It shows that NLO QCD correction generally
increases the LO cross section in our chosen parameter space, and the K-factor
varies from 1.70 to 1.14 when colliding energy goes up from $400 GeV$ to $2
TeV$. We find that the correction distinctly changes the distributions of
transverse momenta of the final top- and bottom-quark states, and the NLO QCD
correction obviously improves the independence of the cross section for process
$\gamma\gamma \to t\bar t b\bar b$ on the renormalization scale.
| hep-ph | we calculated the complete nexttoleading ordernlo qcd corrections to the tbar t b bar b production process at a gamma gamma collider in the standard modelsm the calculation of the oneloop qcd correction includes the evaluations of the hexagon and pentagon amplitudes we studied the nlo qcd corrected total cross section the distributions of transverse momenta of final top and bottomquark states and the dependence of the cross section on renormalization scale mu it shows that nlo qcd correction generally increases the lo cross section in our chosen parameter space and the kfactor varies from 170 to 114 when colliding energy goes up from 400 gev to 2 tev we find that the correction distinctly changes the distributions of transverse momenta of the final top and bottomquark states and the nlo qcd correction obviously improves the independence of the cross section for process gammagamma to tbar t bbar b on the renormalization scale | [['we', 'calculated', 'the', 'complete', 'nexttoleading', 'ordernlo', 'qcd', 'corrections', 'to', 'the', 'tbar', 't', 'b', 'bar', 'b', 'production', 'process', 'at', 'a', 'gamma', 'gamma', 'collider', 'in', 'the', 'standard', 'modelsm', 'the', 'calculation', 'of', 'the', 'oneloop', 'qcd', 'correction', 'includes', 'the', 'evaluations', 'of', 'the', 'hexagon', 'and', 'pentagon', 'amplitudes', 'we', 'studied', 'the', 'nlo', 'qcd', 'corrected', 'total', 'cross', 'section', 'the', 'distributions', 'of', 'transverse', 'momenta', 'of', 'final', 'top', 'and', 'bottomquark', 'states', 'and', 'the', 'dependence', 'of', 'the', 'cross', 'section', 'on', 'renormalization', 'scale', 'mu', 'it', 'shows', 'that', 'nlo', 'qcd', 'correction', 'generally', 'increases', 'the', 'lo', 'cross', 'section', 'in', 'our', 'chosen', 'parameter', 'space', 'and', 'the', 'kfactor', 'varies', 'from', '170', 'to', '114', 'when', 'colliding', 'energy', 'goes', 'up', 'from', '400', 'gev', 'to', '2', 'tev', 'we', 'find', 'that', 'the', 'correction', 'distinctly', 'changes', 'the', 'distributions', 'of', 'transverse', 'momenta', 'of', 'the', 'final', 'top', 'and', 'bottomquark', 'states', 'and', 'the', 'nlo', 'qcd', 'correction', 'obviously', 'improves', 'the', 'independence', 'of', 'the', 'cross', 'section', 'for', 'process', 'gammagamma', 'to', 'tbar', 't', 'bbar', 'b', 'on', 'the', 'renormalization', 'scale']] | [-0.06805781271838236, 0.2100842764990684, -0.10075527882459116, 0.13188701949712042, -0.003591278939221809, -0.06599239311089702, 0.0587520464449007, 0.32404302055734435, -0.1911914802637268, -0.25504698895307537, -0.08091308321922507, -0.3854217807050137, 0.07321234428463808, 0.10484868220473621, 0.09411285888499525, 0.13375264650295957, 0.11111174709942752, 0.019299535120356513, -0.08825856768237, -0.26227391189804267, 0.31074288830801333, 0.0654447382008596, 0.20410918247782522, 0.20906435665704942, 0.057368730958794655, 0.10261027652882891, -0.09672180819287104, -0.07650109415322624, -0.1566161673392962, 0.0027145231070831643, 0.19314185559165245, -0.016244962752121044, 0.08203698769424816, -0.25279716671949704, -0.042385229573043345, 0.06437242456279646, 0.13166692409530475, 0.09265105361484137, 0.04547549059669323, -0.26920071385459965, 0.12081025442826787, -0.2732133886174244, -0.09508987130168095, -0.05441148241896645, 0.02749382221182577, -0.10644974096927767, -0.3265856770688997, 0.08268139701567931, -0.036874325544226406, -0.013163565583466217, 0.05255668020040235, -0.23407648638913445, -0.12848711585522526, 0.03774226556042836, 0.12136644725741064, 0.1216565495649097, 0.2306256089694311, -0.19960276988864528, -0.1888134003330777, 0.4040659242263977, -0.08225908539458818, -0.13482348091924698, 0.09522755262959334, -0.244021750256127, -0.1437914092651054, 0.21612767031830218, 0.23726376674588454, 0.09962363764217574, -0.14193571397771806, 0.1942180496696809, 0.06544648071909262, 0.169095145033222, 0.11115447617458557, 0.016690524062141776, 0.08642643612746326, 0.1340634066145867, -0.0227087557443655, 0.05014914649179558, -0.13695068996942913, -0.09947962121538867, -0.5121892276463507, -0.10263403229399438, -0.05708887024015626, 0.0841701321997771, -0.1317170771301855, -0.14133262834542132, 0.35967051879703704, 0.11858518144992344, 0.32176217410768215, 0.04873687499720189, 0.3326152595173981, 0.1344839917941725, 0.1158633293647523, 0.10139519204657595, 0.3081226496184184, 0.18726835470476183, 0.13049476797421602, -0.26779589593544406, -0.003319060533410973, 0.07427080832665263] |
708.2952 | QED of excitons with nonlocal susceptibility in arbitrary-structured
dielectrics | We have constructed a complete quantum theory for an optical process of
excitons with nonlocal susceptibility originating from their center-of-mass
motion. This theory provides a practical calculation method for
arbitrary-structured nano-to-macro scale dielectrics where excitons are weakly
confined. We obtain good correspondences with underlying theories,
semiclassical microscopic nonlocal theory, and QED theories for dispersive and
absorptive materials with local susceptibility.
| physics.optics | we have constructed a complete quantum theory for an optical process of excitons with nonlocal susceptibility originating from their centerofmass motion this theory provides a practical calculation method for arbitrarystructured nanotomacro scale dielectrics where excitons are weakly confined we obtain good correspondences with underlying theories semiclassical microscopic nonlocal theory and qed theories for dispersive and absorptive materials with local susceptibility | [['we', 'have', 'constructed', 'a', 'complete', 'quantum', 'theory', 'for', 'an', 'optical', 'process', 'of', 'excitons', 'with', 'nonlocal', 'susceptibility', 'originating', 'from', 'their', 'centerofmass', 'motion', 'this', 'theory', 'provides', 'a', 'practical', 'calculation', 'method', 'for', 'arbitrarystructured', 'nanotomacro', 'scale', 'dielectrics', 'where', 'excitons', 'are', 'weakly', 'confined', 'we', 'obtain', 'good', 'correspondences', 'with', 'underlying', 'theories', 'semiclassical', 'microscopic', 'nonlocal', 'theory', 'and', 'qed', 'theories', 'for', 'dispersive', 'and', 'absorptive', 'materials', 'with', 'local', 'susceptibility']] | [-0.08457161756714099, 0.16642376861825048, -0.07518454580086059, 0.034052521411028686, -0.053404564744439616, -0.20790695185885474, -0.008103239512600904, 0.3957516412603958, -0.21935949128137194, -0.2479163450068505, -0.04415626748432887, -0.3342389186587313, -0.16100565056669816, 0.1685908511923305, 0.028592377194556696, 0.09421540750190616, 0.002644724260758737, -0.03063278410840651, -0.07549147270539583, -0.16514631922774273, 0.29349427852490595, -0.007758283194812849, 0.26736610665403565, 0.13269058606137746, 0.08723582465458533, 0.06974173265766224, 0.06037840545819751, 0.040744027219198904, -0.1464781496705937, 0.17030501031670078, 0.2647507281909729, -0.05126479415801065, 0.2036407983155343, -0.4973650587529972, -0.26067234766830144, 0.01766071274298532, 0.09891296095407472, 0.206612103425994, -0.0811660555251553, -0.31662321302654417, 0.020344474047807783, -0.15346854977341817, -0.13449007368261187, -0.17994425752489218, -0.007461172207419215, -0.03074320643369494, -0.2750573194874772, 0.17336425311253245, -0.013619992625096748, 0.08892463133188672, -0.09821983631941136, -0.027303699147084665, 0.04377239663153887, 0.07099854350411172, -0.0075951401502544315, 0.017461535165584165, 0.154278423203605, -0.18285846544513962, -0.17168116203412928, 0.4071991263471287, -0.045183462572508847, -0.17249645896914317, 0.19153404943163282, -0.12733698723002754, -0.0529771687077551, 0.13698740342053875, 0.1306284689946614, 0.16973074840317512, -0.16164318705981212, 0.14367705781679152, -0.03696674570955079, 0.16260589085166052, 0.017830108171971195, 0.17393230939894144, 0.2278865964376721, 0.14277837168955212, -0.008840667625792838, 0.10736322749791474, -0.011978488760711304, -0.13618788927600817, -0.3720720847747449, -0.11118758306035707, -0.17238386318986787, 0.12313417610632063, -0.09243350579545849, -0.24957798874198361, 0.34772457118178235, 0.12305524785639638, 0.1336511173285544, 0.04016672357402999, 0.23936528834546433, 0.17383105988646375, 0.04489399543722514, 0.024140345012961792, 0.2779349444498276, 0.21622104915501228, 0.10955266863236139, -0.2383388653046307, -0.0738395842330145, 0.11319761291338966] |
708.2953 | Equilibrium-like behavior in far-from-equilibrium chemical reaction
networks | In an equilibrium chemical reaction mixture, the number of molecules present
obeys a Poisson distribution. We ask when the same is true of the steady state
of a nonequilibrium reaction network and obtain an essentially complete answer.
In particular, we show that networks with certain topological features must
have a Poisson distribution, whatever the reaction rates. Such driven systems
also obey an analog of the fluctuation-dissipation theorem. Our results may be
relevant to biological systems and to the larger question of how equilibrium
concepts might apply to nonequilibrium systems.
| cond-mat.stat-mech cond-mat.soft q-bio.MN | in an equilibrium chemical reaction mixture the number of molecules present obeys a poisson distribution we ask when the same is true of the steady state of a nonequilibrium reaction network and obtain an essentially complete answer in particular we show that networks with certain topological features must have a poisson distribution whatever the reaction rates such driven systems also obey an analog of the fluctuationdissipation theorem our results may be relevant to biological systems and to the larger question of how equilibrium concepts might apply to nonequilibrium systems | [['in', 'an', 'equilibrium', 'chemical', 'reaction', 'mixture', 'the', 'number', 'of', 'molecules', 'present', 'obeys', 'a', 'poisson', 'distribution', 'we', 'ask', 'when', 'the', 'same', 'is', 'true', 'of', 'the', 'steady', 'state', 'of', 'a', 'nonequilibrium', 'reaction', 'network', 'and', 'obtain', 'an', 'essentially', 'complete', 'answer', 'in', 'particular', 'we', 'show', 'that', 'networks', 'with', 'certain', 'topological', 'features', 'must', 'have', 'a', 'poisson', 'distribution', 'whatever', 'the', 'reaction', 'rates', 'such', 'driven', 'systems', 'also', 'obey', 'an', 'analog', 'of', 'the', 'fluctuationdissipation', 'theorem', 'our', 'results', 'may', 'be', 'relevant', 'to', 'biological', 'systems', 'and', 'to', 'the', 'larger', 'question', 'of', 'how', 'equilibrium', 'concepts', 'might', 'apply', 'to', 'nonequilibrium', 'systems']] | [-0.10909882707918962, 0.13529119131418882, -0.14225986658358747, 0.0797456284694562, -0.015161344969875357, -0.1343607798982621, 0.05411248738626332, 0.3115482480982005, -0.3094774969759282, -0.2508335776177099, 0.02826868022499041, -0.2500962754109812, -0.16916834463606054, 0.1752393777178747, -0.0659112826544331, 0.04998691876031709, 0.04382083810776932, 0.049524279583371085, -0.026672234724725734, -0.2354320065311962, 0.3650424179903577, 0.05800694086473812, 0.2838638045123956, 0.060113285940266055, 0.08607770088704282, -0.041937555385272156, 0.04357469015430366, 0.004892616353541864, -0.1482880982297134, 0.07456045060973154, 0.2632083156841985, 0.12257355306130112, 0.2371839207879613, -0.4443920488061195, -0.23854948603286502, 0.15673049139068201, 0.13223430924012922, 0.16501991249872058, -0.0169352563202716, -0.22730827487722624, 0.07394559720133463, -0.15297845059357, -0.16234573405863864, -0.10454196830049911, 0.031048999659800798, 0.07275802673499905, -0.26577116035217985, 0.06963528763585243, 0.1229721050149646, 0.034141571836525136, -0.09398919960295551, -0.10527586300852133, -0.049424291282285295, 0.1609524904238191, -0.025988935853552556, -0.021417223362139626, 0.18656647450740585, -0.14108085079809254, -0.11932201302620803, 0.39525876810585847, -0.06009382133508164, -0.22321642640182812, 0.22030836143897156, -0.1389861400919349, -0.17892404954247387, 0.11068367603067518, 0.15712524039063896, 0.0944967384952424, -0.21106200640464562, 0.02145345454114709, -0.06076421212467752, 0.16496549138610953, 0.040652737776183764, 0.019936350639909506, 0.20130579481215288, 0.15630330397025421, 0.0756768967270893, 0.1530919820920491, -0.02893131221003642, -0.1585122262117233, -0.2753931014076545, -0.17072883949437168, -0.18646590259930726, 0.14927718440185855, -0.06169636505675565, -0.16718121567803823, 0.31125396789375986, 0.16213295843290018, 0.2030111321070221, 0.05242919554839727, 0.21963813216582442, 0.16836620834943827, -0.01452501719880305, 0.06673921819441439, 0.1880142925872227, 0.1620296687934171, 0.11696606191408852, -0.2003922004624155, 0.10331940867550922, 0.011378670017119874] |
708.2954 | Coronal Neutrino Emission in Hypercritical Accretion Flows | Hypercritical accretion flows onto stellar mass black holes (BHs) are
commonly considered as a promising model of central engines of gamma-ray bursts
(GRBs). In this model a certain fraction of gravitational binding energy of
accreting matter is deposited to the energy of relativistic jets via neutrino
annihilation and/or magnetic fields. However, some recent studies have
indicated that the energy deposition rate by neutrino annihilation is somewhat
smaller than that needed to power a GRB. To overcome this difficulty,
Ramirez-Ruiz & Socrates (2005) proposed that high energy neutrinos from hot
corona above the accretion disk might enhance the efficiency of energy
deposition. We elucidate the disk corona model in the context of hypercritical
accretion flows. From the energy balance in the disk and the corona, we can
calculate the disk and coronal temperature, Td and Tc, and neutrino spectra,
taking into account the neutrino cooling processes by neutrino-electron
scatterings and neutrino pair productions. The calculated neutrino spectra
consist of two peaks; one by the neutrino emission from the disk and the other
by that from the corona. We find that the disk corona can enhance the
efficiency of energy release but only by a factor of 1.5 or so, unless the
height of the corona is very small, H<<r. This is because the neutrino emission
is very sensitive to the temperature of emitting region, and then the ratio
Tc/Td cannot be so large.
| astro-ph | hypercritical accretion flows onto stellar mass black holes bhs are commonly considered as a promising model of central engines of gammaray bursts grbs in this model a certain fraction of gravitational binding energy of accreting matter is deposited to the energy of relativistic jets via neutrino annihilation andor magnetic fields however some recent studies have indicated that the energy deposition rate by neutrino annihilation is somewhat smaller than that needed to power a grb to overcome this difficulty ramirezruiz socrates 2005 proposed that high energy neutrinos from hot corona above the accretion disk might enhance the efficiency of energy deposition we elucidate the disk corona model in the context of hypercritical accretion flows from the energy balance in the disk and the corona we can calculate the disk and coronal temperature td and tc and neutrino spectra taking into account the neutrino cooling processes by neutrinoelectron scatterings and neutrino pair productions the calculated neutrino spectra consist of two peaks one by the neutrino emission from the disk and the other by that from the corona we find that the disk corona can enhance the efficiency of energy release but only by a factor of 15 or so unless the height of the corona is very small hr this is because the neutrino emission is very sensitive to the temperature of emitting region and then the ratio tctd cannot be so large | [['hypercritical', 'accretion', 'flows', 'onto', 'stellar', 'mass', 'black', 'holes', 'bhs', 'are', 'commonly', 'considered', 'as', 'a', 'promising', 'model', 'of', 'central', 'engines', 'of', 'gammaray', 'bursts', 'grbs', 'in', 'this', 'model', 'a', 'certain', 'fraction', 'of', 'gravitational', 'binding', 'energy', 'of', 'accreting', 'matter', 'is', 'deposited', 'to', 'the', 'energy', 'of', 'relativistic', 'jets', 'via', 'neutrino', 'annihilation', 'andor', 'magnetic', 'fields', 'however', 'some', 'recent', 'studies', 'have', 'indicated', 'that', 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708.2955 | Gamma-ray emission from massive young stellar objects | Massive stars form in dense and massive molecular cores. The exact formation
mechanism is unclear, but it is possible that some massive stars are formed by
processes similar to those that produce the low-mass stars, with
accretion/ejection phenomena occurring at some point of the evolution of the
protostar. This picture seems to be supported by the detection of a collimated
stellar wind emanating from the massive protostar IRAS 16547-4247. A triple
radio source is associated with the protostar: a compact core and two radio
lobes. The emission of the southern lobe is clearly non-thermal. Such emission
is interpreted as synchrotron radiation produced by relativistic electrons
locally accelerated at the termination point of a thermal jet. Since the
ambient medium is determined by the properties of the molecular cloud in which
the whole system is embedded, we can expect high densities of particles and
infrared photons. Because of the confirmed presence of relativistic electrons,
inverse Compton and relativistic Bremsstrahlung interactions are unavoidable.
Proton-proton collision should also occur, producing an injection of neutral
pions. In this paper we aim at making quantitative predictions of the spectral
energy distribution of the non-thermal spots generated by massive young stellar
objects, with emphasis on the particular case of IRAS 16547-4247. We present
spectral energy distributions for the southern lobe of this source, for a
variety of conditions. We show that high-energy emission might be detectable
from this object in the gamma-ray domain (MeV to TeV). The source may also be
detectable at X-rays through long exposures with current X-ray instruments.
| astro-ph | massive stars form in dense and massive molecular cores the exact formation mechanism is unclear but it is possible that some massive stars are formed by processes similar to those that produce the lowmass stars with accretionejection phenomena occurring at some point of the evolution of the protostar this picture seems to be supported by the detection of a collimated stellar wind emanating from the massive protostar iras 165474247 a triple radio source is associated with the protostar a compact core and two radio lobes the emission of the southern lobe is clearly nonthermal such emission is interpreted as synchrotron radiation produced by relativistic electrons locally accelerated at the termination point of a thermal jet since the ambient medium is determined by the properties of the molecular cloud in which the whole system is embedded we can expect high densities of particles and infrared photons because of the confirmed presence of relativistic electrons inverse compton and relativistic bremsstrahlung interactions are unavoidable protonproton collision should also occur producing an injection of neutral pions in this paper we aim at making quantitative predictions of the spectral energy distribution of the nonthermal spots generated by massive young stellar objects with emphasis on the particular case of iras 165474247 we present spectral energy distributions for the southern lobe of this source for a variety of conditions we show that highenergy emission might be detectable from this object in the gammaray domain mev to tev the source may also be detectable at xrays through long exposures with current xray instruments | [['massive', 'stars', 'form', 'in', 'dense', 'and', 'massive', 'molecular', 'cores', 'the', 'exact', 'formation', 'mechanism', 'is', 'unclear', 'but', 'it', 'is', 'possible', 'that', 'some', 'massive', 'stars', 'are', 'formed', 'by', 'processes', 'similar', 'to', 'those', 'that', 'produce', 'the', 'lowmass', 'stars', 'with', 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708.2956 | At Least Half Of All Graphs Satisfy \chi \leq {1/4}\omega + {3/4}\Delta
+ 1 | We prove that for any graph G at least one of G or $\bar{G}$ satisfies $\chi
\leq {1/4}\omega + {3/4}\Delta + 1$. In particular, self-complementary graphs
satisfy this bound.
| math.CO | we prove that for any graph g at least one of g or barg satisfies chi leq 14omega 34delta 1 in particular selfcomplementary graphs satisfy this bound | [['we', 'prove', 'that', 'for', 'any', 'graph', 'g', 'at', 'least', 'one', 'of', 'g', 'or', 'barg', 'satisfies', 'chi', 'leq', '14omega', '34delta', '1', 'in', 'particular', 'selfcomplementary', 'graphs', 'satisfy', 'this', 'bound']] | [-0.24999261159449815, 0.15988053295761348, -0.043452028054744005, 0.00647602868732065, -0.11494257528334856, -0.2671924978494644, 0.010092854741960764, 0.36559963467530904, -0.24402286060154438, -0.33180230267345906, 0.06444756663870066, -0.3381089086830616, -0.09969456140883266, 0.13208859770558776, -0.06847566820681095, -0.05644375558942556, 0.11155888902023435, 0.19697808153927326, -0.038918362213298675, -0.26807956565753555, 0.3205134361598175, -0.18638431623578072, 0.09969087608158589, 0.10141440937295557, 0.13024477917701005, 0.043833198957145214, 0.12560354478657246, 0.012141678296029568, -0.2775636923420825, 0.01875032601878047, 0.24510245829820632, 0.14083439881913365, 0.2189018028974533, -0.3437885569036007, -0.1668065807968378, 0.32639629419893024, 0.10998540936037898, -0.08568573076277972, 0.03391925812698901, -0.15758248845115305, 0.2706809989362955, -0.08922307439148426, -0.11247810833156109, 0.04829792719334364, 0.118649567887187, -0.02697453323751688, -0.3371827986091375, 0.00249762374907732, 0.19506929524242878, 0.03316795494407415, 0.12531533479690551, -0.22913545157760382, -0.029519291296601295, 0.03180924569256604, -0.10036101557314396, 0.09933285797014832, -0.031442528199404476, -0.11666173874400557, -0.0986689443141222, 0.3442768403887749, -0.07561823152005673, -0.13698058769106866, 0.0412403216958046, -0.21274469830095769, -0.31966608971357346, 0.038817557021975514, 0.10815828461199999, 0.2114489370584488, 0.016802830547094347, 0.21316970543935895, -0.15752814441919327, 0.1619212318956852, 0.19450481340289116, 0.005308196190744638, 0.06012603860348463, 0.03884494428522885, 0.2340168995037675, 0.1495745312422514, 0.07067098438739777, 0.2124082414060831, -0.3878455540537834, -0.12318154885666445, -0.27382570763118563, 0.11215989798307419, -0.19803999057039617, -0.11020026739686728, 0.3135828471183777, 0.11923188284039497, 0.10355503663420677, 0.1670438157999888, 0.15395727023482322, 0.0900017073377967, 0.02933701244648546, 0.28277952414005997, 0.11957017786800861, 0.19816030964255332, -0.10983917899429799, -0.0985347412712872, 0.042740401523187754, 0.13679281692951917] |
708.2957 | A quantization of the Hitchin hamiltonian system and the
Beilinson-Drinfeld isomorphism | We will study the Hitchin's hamiltonian system for a modular stack of
principal SL_2(C) bundle on a smooth projective curve which has a parabolic
reduction at certain points. As an application we will obtain a generalization
of the Beilinson-Drinfeld isomorphism, which is a quantization of the Hitchin's
hamiltonian system.
| math.AG math.QA | we will study the hitchins hamiltonian system for a modular stack of principal sl_2c bundle on a smooth projective curve which has a parabolic reduction at certain points as an application we will obtain a generalization of the beilinsondrinfeld isomorphism which is a quantization of the hitchins hamiltonian system | [['we', 'will', 'study', 'the', 'hitchins', 'hamiltonian', 'system', 'for', 'a', 'modular', 'stack', 'of', 'principal', 'sl_2c', 'bundle', 'on', 'a', 'smooth', 'projective', 'curve', 'which', 'has', 'a', 'parabolic', 'reduction', 'at', 'certain', 'points', 'as', 'an', 'application', 'we', 'will', 'obtain', 'a', 'generalization', 'of', 'the', 'beilinsondrinfeld', 'isomorphism', 'which', 'is', 'a', 'quantization', 'of', 'the', 'hitchins', 'hamiltonian', 'system']] | [-0.26004038568662136, -0.01604171488546928, -0.15824716090585808, 0.029437964413866247, -0.10774829831658578, -0.15334286326922628, -0.010005687686557673, 0.29699365551374396, -0.32105250306883637, -0.1863793625439308, 0.1374863695201217, -0.23600894779118956, -0.19435200676778142, 0.2314678615681371, -0.17004528970514632, 0.025038965654616455, 0.11165508286248209, 0.10273139824976726, -0.16016055818419067, -0.26700357982784284, 0.42241261388194196, 0.011308143257486577, 0.2363816655564065, 0.010130242463581416, 0.1781756750269964, 0.05779658200941524, 0.09922232217516522, -0.040495957590031384, -0.11329722060460826, 0.1455256502353111, 0.2693218111763803, 0.03735033594718089, 0.1860176153785112, -0.33542044835203155, -0.18375070006301514, 0.16754372465443246, 0.14096113269654464, 0.09825496453012587, 0.04095627584409121, -0.24634890684059688, 0.06407177463477971, -0.16412689609034936, -0.17972389789184137, -0.10382874043924468, 0.017779156556162908, -0.019853229962327346, -0.2069277780377591, -0.1160227206098486, 0.09144212083168785, 0.11820808074072393, -0.08760987448373012, -0.030245857013921653, -0.08166097622478799, 0.02990158762288641, -0.04965882271775329, 0.0763647935533782, 0.11051797699563358, -0.08485000850442721, -0.09240355690447044, 0.3904123616841983, -0.06637749668894982, -0.22798289655118573, 0.10251967502491814, -0.039408470998157044, -0.16351864125807675, 0.13227519339748792, 0.15581288475695312, 0.12691365368664265, -0.058840888115216275, 0.16918844657436927, -0.13998026244950537, 0.11880762728729419, 0.031247448499257466, -0.07559852161425717, 0.15997151316295624, 0.15482825156757418, 0.14080557609167027, 0.14772870490441517, -0.04785093198036205, -0.066015664221985, -0.40252209241901127, -0.27356466974074745, -0.10689313557683205, 0.21046183298208884, -0.10320001354973231, -0.20210720686127945, 0.4695363974920949, 0.02514078521302768, 0.2438414341066869, 0.09283267613025192, 0.23652584461153162, 0.1327918544387901, 0.04437708866079243, -0.007854065794274402, 0.18218466983537893, 0.18249656155477373, 0.03162675923477782, -0.16325175689713917, -0.08553483473060995, 0.1990885631162293] |
708.2958 | Quantum critical phenomena of unconventional superconductors: U(1) gauge
model of link Cooper pair | In this paper we shall study quantum critical behavior of lattice model of
unconventional superconductors (SC) that was proposed in the previous papers.
In this model, the Cooper-pair (CP) field is defined on lattice links in order
to describe d-wave SC. The CP field can be regarded as a U(1) lattice gauge
field, and the SC phase transition takes place as a result of the phase
coherence of the CP field. Effects of the long-range Coulomb interactions
between the CP's and fluctuations of the electromagnetic field are taken into
account. We investigate the phase structure of the model and the critical
behavior by means of the Monte Carlo simulations. We find that the parameter,
which controls the fluxes (vortices) of the CP, strongly influences the phase
structure. In three-dimensional case, the model has rich phase structure. In
particular there is a "monopole proliferation" phase transition besides the SC
phase transition. Depending on the parameters, this transition exists within
the SC phase or takes place simultaneously with the SC transition. This new
type of transition is relevant for unconventional SC's with strong spatial
three-dimensionality and to be observed by experiments.
| cond-mat.supr-con cond-mat.str-el hep-lat | in this paper we shall study quantum critical behavior of lattice model of unconventional superconductors sc that was proposed in the previous papers in this model the cooperpair cp field is defined on lattice links in order to describe dwave sc the cp field can be regarded as a u1 lattice gauge field and the sc phase transition takes place as a result of the phase coherence of the cp field effects of the longrange coulomb interactions between the cps and fluctuations of the electromagnetic field are taken into account we investigate the phase structure of the model and the critical behavior by means of the monte carlo simulations we find that the parameter which controls the fluxes vortices of the cp strongly influences the phase structure in threedimensional case the model has rich phase structure in particular there is a monopole proliferation phase transition besides the sc phase transition depending on the parameters this transition exists within the sc phase or takes place simultaneously with the sc transition this new type of transition is relevant for unconventional scs with strong spatial threedimensionality and to be observed by experiments | [['in', 'this', 'paper', 'we', 'shall', 'study', 'quantum', 'critical', 'behavior', 'of', 'lattice', 'model', 'of', 'unconventional', 'superconductors', 'sc', 'that', 'was', 'proposed', 'in', 'the', 'previous', 'papers', 'in', 'this', 'model', 'the', 'cooperpair', 'cp', 'field', 'is', 'defined', 'on', 'lattice', 'links', 'in', 'order', 'to', 'describe', 'dwave', 'sc', 'the', 'cp', 'field', 'can', 'be', 'regarded', 'as', 'a', 'u1', 'lattice', 'gauge', 'field', 'and', 'the', 'sc', 'phase', 'transition', 'takes', 'place', 'as', 'a', 'result', 'of', 'the', 'phase', 'coherence', 'of', 'the', 'cp', 'field', 'effects', 'of', 'the', 'longrange', 'coulomb', 'interactions', 'between', 'the', 'cps', 'and', 'fluctuations', 'of', 'the', 'electromagnetic', 'field', 'are', 'taken', 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0.13068124695764805, 0.11746775751154889, -0.29413996381862534, 0.05334611946628207, 0.08721335474450989] |
708.2959 | Molecular Line Observations of the Small Protostellar Group L1251B | We present molecular line observations of L1251B, a small group of pre- and
protostellar objects, and its immediate environment in the dense C18O core
L1251E. These data are complementary to near-infrared, submillimeter and
millimeter continuum observations reported by Lee et al. (2006, ApJ, 648, 491;
Paper I). The single-dish data of L1251B described here show very complex
kinematics including infall, rotation and outflow motions, and the
interferometer data reveal these in greater detail. Interferometer data of N2H+
1-0 suggest a very rapidly rotating flattened envelope between two young
stellar objects, IRS1 and IRS2. Also, interferometer data of CO 2-1 resolve the
outflow associated with L1251B seen in single-dish maps into a few narrow and
compact components. Furthermore, the high resolution data support recent
theoretical studies of molecular depletions and enhancements that accompany the
formation of protostars within dense cores. Beyond L1251B, single-dish data are
also presented of a dense core located ~150" to the east that, in Paper I, was
detected at 850 micron but has no associated point sources at near- and
mid-infrared wavelengths. The relative brightness between molecules, which have
different chemical timescales, suggests it is less chemically evolved than
L1251B. This core may be a site for future star formation, however, since line
profiles of HCO+, CS, and HCN show asymmetry with a stronger blue peak, which
is interpreted as an infall signature.
| astro-ph | we present molecular line observations of l1251b a small group of pre and protostellar objects and its immediate environment in the dense c18o core l1251e these data are complementary to nearinfrared submillimeter and millimeter continuum observations reported by lee et al 2006 apj 648 491 paper i the singledish data of l1251b described here show very complex kinematics including infall rotation and outflow motions and the interferometer data reveal these in greater detail interferometer data of n2h 10 suggest a very rapidly rotating flattened envelope between two young stellar objects irs1 and irs2 also interferometer data of co 21 resolve the outflow associated with l1251b seen in singledish maps into a few narrow and compact components furthermore the high resolution data support recent theoretical studies of molecular depletions and enhancements that accompany the formation of protostars within dense cores beyond l1251b singledish data are also presented of a dense core located 150 to the east that in paper i was detected at 850 micron but has no associated point sources at near and midinfrared wavelengths the relative brightness between molecules which have different chemical timescales suggests it is less chemically evolved than l1251b this core may be a site for future star formation however since line profiles of hco cs and hcn show asymmetry with a stronger blue peak which is interpreted as an infall signature | [['we', 'present', 'molecular', 'line', 'observations', 'of', 'l1251b', 'a', 'small', 'group', 'of', 'pre', 'and', 'protostellar', 'objects', 'and', 'its', 'immediate', 'environment', 'in', 'the', 'dense', 'c18o', 'core', 'l1251e', 'these', 'data', 'are', 'complementary', 'to', 'nearinfrared', 'submillimeter', 'and', 'millimeter', 'continuum', 'observations', 'reported', 'by', 'lee', 'et', 'al', '2006', 'apj', '648', '491', 'paper', 'i', 'the', 'singledish', 'data', 'of', 'l1251b', 'described', 'here', 'show', 'very', 'complex', 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708.296 | Rational Solutions of the Noumi and Yamada System of type $A_5^{(1)}$ | We completely classify all of rational solutions of the Noumi and Yamada
system of type $A_5^{(1)}$, which is a generalization of the fifth Painlev\'e
equation. The rational solutions are classified to five classes by the
B\"acklund transformation group.
| math.CA math.AC math.AG | we completely classify all of rational solutions of the noumi and yamada system of type a_51 which is a generalization of the fifth painleve equation the rational solutions are classified to five classes by the backlund transformation group | [['we', 'completely', 'classify', 'all', 'of', 'rational', 'solutions', 'of', 'the', 'noumi', 'and', 'yamada', 'system', 'of', 'type', 'a_51', 'which', 'is', 'a', 'generalization', 'of', 'the', 'fifth', 'painleve', 'equation', 'the', 'rational', 'solutions', 'are', 'classified', 'to', 'five', 'classes', 'by', 'the', 'backlund', 'transformation', 'group']] | [-0.21112568014742514, -0.03279472597090429, -0.05787239738396908, 0.040693839218491984, -0.13376565663585147, -0.2064311029757128, 0.0011607836380502896, 0.22745748599501034, -0.31751336872969804, -0.2347812360446704, 0.13067733960863398, -0.33653349429368973, -0.20120706977812866, 0.18332889024168253, -0.05128612268814131, 0.01722256062356265, -0.054818190609742155, 0.034757189029876734, -0.12776524997561386, -0.35985139002533334, 0.4198227735285304, -0.12641495819154538, 0.21323181953477233, -0.0724177940405513, 0.13547441155012502, -0.0630073923997483, -0.03628777864536172, -0.029516707346039384, -0.10377834606180458, 0.05820325939107294, 0.25428251476076086, 0.10717424183416083, 0.16818686702141636, -0.28052913255401346, -0.1317682899779787, 0.15864505768312434, 0.16559678172741674, 0.09618345759257577, 0.003228631409767427, -0.3337027695226042, 0.0818958392268733, -0.18755054640534677, -0.23116085591333868, -0.10604930350458935, 0.06075623260173751, 0.1314991423002395, -0.18637097845050066, 0.02051062827443897, 0.08497062266657227, 0.045938628482537366, -0.14873904895380533, -0.05150475885755824, -0.07125977034631528, 0.0744413171625255, 0.0008584747495325772, -0.0023765017425543384, -0.0012659415063497267, -0.10811626106059473, -0.1245471081010213, 0.4079487413462055, 0.00015935775407246853, -0.2600265905677684, 0.1629377029296991, -0.07472995990936301, -0.15905105897323474, 0.14897413184180072, 0.09619563139092766, 0.14581903379018368, -0.19816541487939263, 0.09693279729904852, -0.07311819942275945, 0.0988226363704981, 0.13079317638307417, -0.07080914036027695, 0.11407807935029268, 0.062397859647477925, -0.02504180249218878, 0.11702863264240716, 0.047869996706906115, -0.06592861676931773, -0.3480451199177064, -0.21877457338728404, -0.08691100079235375, 0.08366883740956454, -0.0804151645980279, -0.16244211587074556, 0.4688857433043028, 0.029924924362842973, 0.10590652535718523, 0.08505438446177561, 0.10184144336534173, 0.1386961543834523, 0.07790099961781188, 0.024117282432454982, 0.19846310824351876, 0.1532584866079943, 0.05972703068370098, -0.19039661492110768, -0.05254526558871332, 0.3113395689349425] |
708.2961 | Cancellation problem for projective modules over affine algebras | Let A be a ring of dimension d and let P be a projective A-module of rank d.
We prove that if for every finite extension R of A, R^d is cancellative, then P
is cancellative. This gives an alternate proof of Bhatwadekar's result: every
projective module of rank d over an affine algebra of dimension d over a
C_1-field of characteristic 0 is cancellative.
Let P be a projective module of rank d-1 over an affine agebra of dimension d
over an algebraically closed field. Then, it is not known if P is cancellative.
We prove some results in this direction also.
| math.AC math.KT | let a be a ring of dimension d and let p be a projective amodule of rank d we prove that if for every finite extension r of a rd is cancellative then p is cancellative this gives an alternate proof of bhatwadekars result every projective module of rank d over an affine algebra of dimension d over a c_1field of characteristic 0 is cancellative let p be a projective module of rank d1 over an affine agebra of dimension d over an algebraically closed field then it is not known if p is cancellative we prove some results in this direction also | [['let', 'a', 'be', 'a', 'ring', 'of', 'dimension', 'd', 'and', 'let', 'p', 'be', 'a', 'projective', 'amodule', 'of', 'rank', 'd', 'we', 'prove', 'that', 'if', 'for', 'every', 'finite', 'extension', 'r', 'of', 'a', 'rd', 'is', 'cancellative', 'then', 'p', 'is', 'cancellative', 'this', 'gives', 'an', 'alternate', 'proof', 'of', 'bhatwadekars', 'result', 'every', 'projective', 'module', 'of', 'rank', 'd', 'over', 'an', 'affine', 'algebra', 'of', 'dimension', 'd', 'over', 'a', 'c_1field', 'of', 'characteristic', '0', 'is', 'cancellative', 'let', 'p', 'be', 'a', 'projective', 'module', 'of', 'rank', 'd1', 'over', 'an', 'affine', 'agebra', 'of', 'dimension', 'd', 'over', 'an', 'algebraically', 'closed', 'field', 'then', 'it', 'is', 'not', 'known', 'if', 'p', 'is', 'cancellative', 'we', 'prove', 'some', 'results', 'in', 'this', 'direction', 'also']] | [-0.22016437185526477, 0.1231053079867635, -0.11361258814805279, -0.06101177260850319, -0.04720709915729422, -0.2589813973115501, -0.06205975596665168, 0.34234032611928733, -0.39191066944862113, -0.07886213674118706, 0.07088152550539806, -0.23447171910483317, -0.09636819482707948, 0.20550965475986765, -0.13850355064998582, -0.12401380078574899, 0.021410167575631217, 0.21243419694513374, -0.07546252385466634, -0.34995534784142296, 0.35324925060073536, -0.054649496158840606, 0.12910517301483482, 0.07852781626085441, 0.11277225690291208, 0.052628418731996245, 0.010162840588200911, 0.04144805240873978, -0.16331971757943964, 0.061725710473005097, 0.36765473942254107, 0.13860626466910117, 0.2631698940588417, -0.2953305163976563, -0.11464223675612434, 0.3004750845572619, 0.18351413668407238, -0.025380867478602073, 0.038945842210166885, -0.22763389228459666, 0.19556281470931045, -0.21188609195215738, -0.17832701993813993, -0.029597325363497743, 0.21961103198711998, -0.06799175527275485, -0.3637740181475951, -0.07025225323826924, 0.15968250643973256, 0.20933478373084582, -0.051874639315749795, -0.10559491445675638, -0.039715295657515526, -0.03693820617284954, -0.07146593877433927, 0.13768385582621775, 0.045392900338971656, 0.025790653360423212, -0.14723696233704686, 0.32392263955290557, -0.052324472654921315, -0.26261532091188666, 0.10001019553701375, -0.2172906909996242, -0.0684362954377909, 0.14789306575103717, 0.0884672168770111, 0.1692199867053811, 0.03724430254021404, 0.29873583656587344, -0.22082870889126377, 0.15166213575239276, 0.08106455454310658, -0.03402254219833469, 0.10717906647672255, 0.09621655045752871, 0.14205916401474764, 0.10228401503648937, 0.01086637630656946, 0.11894951519264164, -0.40555590844037487, -0.23205293643781366, -0.15879468348644235, 0.24337989169725915, -0.12925905190101783, -0.13573280150326444, 0.37355047458207563, 0.045197970078637205, 0.19210930948383084, 0.11840124004611782, 0.21123916392817216, 0.03248579950784059, 0.021815806805320522, 0.10764021644660947, 0.009751252379489825, 0.24898688893253898, -0.0824669442988713, -0.08866913583330518, 0.02023311345107561, 0.1976050309444248] |
708.2962 | A Procedure to Solve the Eigen Solution to Dirac Equation | In this paper, we provide a procedure to solve the eigen solutions of Dirac
equation with complicated potential approximately. At first, we solve the eigen
solutions of a linear Dirac equation with complete eigen system, which
approximately equals to the original equation. Take the eigen functions as base
of Hilbert space, and expand the spinor on the bases, we convert the original
problem into solution of extremum of an algebraic function on the unit sphere
of the coefficients. Then the problem can be easily solved. This is a standard
finite element method with strict theory for convergence and effectiveness.
| physics.gen-ph | in this paper we provide a procedure to solve the eigen solutions of dirac equation with complicated potential approximately at first we solve the eigen solutions of a linear dirac equation with complete eigen system which approximately equals to the original equation take the eigen functions as base of hilbert space and expand the spinor on the bases we convert the original problem into solution of extremum of an algebraic function on the unit sphere of the coefficients then the problem can be easily solved this is a standard finite element method with strict theory for convergence and effectiveness | [['in', 'this', 'paper', 'we', 'provide', 'a', 'procedure', 'to', 'solve', 'the', 'eigen', 'solutions', 'of', 'dirac', 'equation', 'with', 'complicated', 'potential', 'approximately', 'at', 'first', 'we', 'solve', 'the', 'eigen', 'solutions', 'of', 'a', 'linear', 'dirac', 'equation', 'with', 'complete', 'eigen', 'system', 'which', 'approximately', 'equals', 'to', 'the', 'original', 'equation', 'take', 'the', 'eigen', 'functions', 'as', 'base', 'of', 'hilbert', 'space', 'and', 'expand', 'the', 'spinor', 'on', 'the', 'bases', 'we', 'convert', 'the', 'original', 'problem', 'into', 'solution', 'of', 'extremum', 'of', 'an', 'algebraic', 'function', 'on', 'the', 'unit', 'sphere', 'of', 'the', 'coefficients', 'then', 'the', 'problem', 'can', 'be', 'easily', 'solved', 'this', 'is', 'a', 'standard', 'finite', 'element', 'method', 'with', 'strict', 'theory', 'for', 'convergence', 'and', 'effectiveness']] | [-0.08976364902554626, 0.01987912158397699, -0.10504339919942948, 0.030218258955177258, -0.11856469375579948, -0.11108423564865282, 0.02030748428513456, 0.29338994221479603, -0.32328775856229996, -0.251416095410182, 0.11369658244957188, -0.27284969993152025, -0.15052665417280162, 0.16931919528717043, -0.0042833768847313795, 0.0917106319943236, 0.07772937516747701, 0.06717968445695759, -0.1411016460724476, -0.267073430309091, 0.3509125471199778, -0.007893024990805473, 0.25162838107783986, 0.011751663494817537, 0.18851654927688416, -0.010596023503258223, 0.055806933229582176, 0.0021671469254546205, -0.10176996399902484, 0.1472900876036911, 0.23739447936679076, 0.13108701228794425, 0.29520873228708905, -0.4324600240027513, -0.1629715779551653, 0.11428623014327252, 0.18653795449533547, 0.09671299935981745, 0.00744458896371376, -0.24090235183636347, 0.0970257514749061, -0.1177902254793379, -0.17941828867928547, -0.07529705398800698, -0.017097782273071283, -0.008016837838416299, -0.29283788879260875, 0.06021821213829698, 0.012555293534233264, 0.00029278203205327795, -0.15584110137489107, -0.119638477764892, 0.002789950311052227, 0.07420656106180766, 0.0127715149005367, 0.01828506277554264, 0.02959914028061309, -0.06768195930811943, -0.08308025279712647, 0.4072105870911419, -0.08221292758837925, -0.3305160301558749, 0.09604937210679054, -0.11209360129585622, -0.0716636457993188, 0.10738146188433724, 0.1804771615154665, 0.14629238335923714, -0.12886542676374166, 0.15549810181226054, -0.07663583601213465, 0.13924995653632313, 0.0713063202295076, -0.03781460293549856, 0.15877917481379378, 0.10738664269423809, 0.11974862463668817, 0.16697629160045485, 0.012933030597526918, -0.12036236750950914, -0.31195623834024777, -0.20204231454849694, -0.20919140082116078, 0.05942710965984699, -0.09492508601838243, -0.20638801341857574, 0.44898102550550995, 0.11781867528146114, 0.18635155056424516, 0.05782555619541631, 0.2872630155767606, 0.2368269513885613, 0.04152501225377424, 0.06787979181366738, 0.2031678312618022, 0.1434740608445171, 0.10143924632457772, -0.2539117144270226, -0.04062514794482426, 0.15973583190240945] |
708.2963 | Tripartite entanglement and threshold properties of coupled intracavity
downconversion and sum-frequency generation | The process of cascaded downconversion and sum-frequency generation inside an
optical cavity has been predicted to be a potential source of three-mode
continuous-variable entanglement. When the cavity is pumped by two fields, the
threshold properties have been analysed, showing that these are more
complicated than in well-known processes such as optical parametric
oscillation. When there is only a single pumping field, the entanglement
properties have been calculated using a linearised fluctuation analysis, but
without any consideration of the threshold properties or critical operating
points of the system. In this work we extend this analysis to demonstrate that
the singly pumped system demonstrates a rich range of threshold behaviour when
quantisation of the pump field is taken into account and that asymmetric
polychromatic entanglement is available over a wide range of operational
parameters.
| quant-ph | the process of cascaded downconversion and sumfrequency generation inside an optical cavity has been predicted to be a potential source of threemode continuousvariable entanglement when the cavity is pumped by two fields the threshold properties have been analysed showing that these are more complicated than in wellknown processes such as optical parametric oscillation when there is only a single pumping field the entanglement properties have been calculated using a linearised fluctuation analysis but without any consideration of the threshold properties or critical operating points of the system in this work we extend this analysis to demonstrate that the singly pumped system demonstrates a rich range of threshold behaviour when quantisation of the pump field is taken into account and that asymmetric polychromatic entanglement is available over a wide range of operational parameters | [['the', 'process', 'of', 'cascaded', 'downconversion', 'and', 'sumfrequency', 'generation', 'inside', 'an', 'optical', 'cavity', 'has', 'been', 'predicted', 'to', 'be', 'a', 'potential', 'source', 'of', 'threemode', 'continuousvariable', 'entanglement', 'when', 'the', 'cavity', 'is', 'pumped', 'by', 'two', 'fields', 'the', 'threshold', 'properties', 'have', 'been', 'analysed', 'showing', 'that', 'these', 'are', 'more', 'complicated', 'than', 'in', 'wellknown', 'processes', 'such', 'as', 'optical', 'parametric', 'oscillation', 'when', 'there', 'is', 'only', 'a', 'single', 'pumping', 'field', 'the', 'entanglement', 'properties', 'have', 'been', 'calculated', 'using', 'a', 'linearised', 'fluctuation', 'analysis', 'but', 'without', 'any', 'consideration', 'of', 'the', 'threshold', 'properties', 'or', 'critical', 'operating', 'points', 'of', 'the', 'system', 'in', 'this', 'work', 'we', 'extend', 'this', 'analysis', 'to', 'demonstrate', 'that', 'the', 'singly', 'pumped', 'system', 'demonstrates', 'a', 'rich', 'range', 'of', 'threshold', 'behaviour', 'when', 'quantisation', 'of', 'the', 'pump', 'field', 'is', 'taken', 'into', 'account', 'and', 'that', 'asymmetric', 'polychromatic', 'entanglement', 'is', 'available', 'over', 'a', 'wide', 'range', 'of', 'operational', 'parameters']] | [-0.1333856592951413, 0.1509899188118156, -0.08874666094638858, 0.018686875745557205, -0.023120804647491736, -0.15640984309456227, 0.025502260359864908, 0.4177846667993105, -0.23361304108490885, -0.2629687745109991, 0.10202640117407127, -0.2525626411500553, -0.09305192593478062, 0.2516674745923162, 0.002627073469656435, 0.07513939447226496, 0.046381147728287477, 0.01263638200224236, -0.007354257823229118, -0.18198979768909118, 0.30702675276993296, 0.02554669887335463, 0.3201200648944712, 0.04278483189233212, 0.09783617402497453, -0.008340435176664456, 0.044104137520524535, 0.0068486512631573005, -0.09185102056604096, 0.06158064621867555, 0.22287893429871253, 0.08248591088781584, 0.27878123878811795, -0.3858486909814405, -0.29671204418903496, 0.13304994220026967, 0.16094347787668195, 0.15512088840037133, -0.05024177072515489, -0.27881543765154976, 0.048941683948435115, -0.1724404081345931, -0.1007455189533313, -0.07484023186208849, 0.014771092092180907, 0.02895599356005815, -0.26876952586286335, 0.02300708180744991, 0.08697003925265039, 0.0968006913846528, -0.008265542616065817, -0.051112224226182494, -0.044585852751466024, 0.10328642959388107, -0.027314639347120345, -0.020307529030657006, 0.15181982162837152, -0.16074579368542993, -0.09801185251897991, 0.3628233996935182, -0.08447882189350574, -0.1351160391491386, 0.143373742741074, -0.18066205681216987, -0.06566478701124927, 0.15318560508206824, 0.147258570428345, 0.09748144004366953, -0.17504984698649478, 0.04399217165932483, -0.03602130129707582, 0.22582188963530248, 0.09218254108616913, 0.10443700184678716, 0.21932210535460123, 0.17945169966674945, 0.008015567964210994, 0.21505310978638148, -0.08533687568551888, -0.10489628706691843, -0.2885076493107728, -0.11069950715561087, -0.1819606738404907, 0.06210955090125825, -0.037472313804204474, -0.12164587013169446, 0.4334408873586323, 0.14744694960642268, 0.14628538963469592, -0.02811533001703069, 0.3143944863660374, 0.20104424073272667, 0.10315965366493346, 0.03530616138948861, 0.32749440472319047, 0.13404137881165792, 0.06551481601270621, -0.2351746767385383, 0.008415307951949988, -0.023271520988959255] |
708.2964 | General multipartite entangled states and complex projective variety | We discuss and investigate the geometrical structure of general multipartite
states. In particular, we show that a geometrical measure of entanglement for
general multipartite states can be constructed by the complex projective
varieties defined by quadratic polynomials.
| quant-ph | we discuss and investigate the geometrical structure of general multipartite states in particular we show that a geometrical measure of entanglement for general multipartite states can be constructed by the complex projective varieties defined by quadratic polynomials | [['we', 'discuss', 'and', 'investigate', 'the', 'geometrical', 'structure', 'of', 'general', 'multipartite', 'states', 'in', 'particular', 'we', 'show', 'that', 'a', 'geometrical', 'measure', 'of', 'entanglement', 'for', 'general', 'multipartite', 'states', 'can', 'be', 'constructed', 'by', 'the', 'complex', 'projective', 'varieties', 'defined', 'by', 'quadratic', 'polynomials']] | [-0.17659841470319676, 0.1564274238221146, -0.06736490477782649, 0.12654361077206763, -0.018294642905931215, -0.1619884334127041, -0.0366478989253173, 0.32502595921726646, -0.2937596855131355, -0.20888076068179026, 0.044667653912502166, -0.1685374693794025, -0.20743573759053205, 0.16242617049027938, -0.11308508401585592, 0.07048637168230237, 0.03342739225214196, 0.024724992092799495, -0.12082850587604618, -0.26934811557844485, 0.4957611621231646, -0.026405687846646115, 0.23699142461692965, 0.10414037435642771, 0.09576747626871676, 0.027351521282784036, 0.011261535154001133, 0.0686395782473925, -0.17055337260122494, 0.13492359954398125, 0.3277300473906704, 0.18131386971956975, 0.1533404399980665, -0.3975531920992039, -0.21946506944761887, 0.178125100638214, 0.07674489495017238, 0.1275950747768621, 0.00821415221670995, -0.3496224897838122, 0.013261800320391115, -0.13764931689444426, -0.18029584015744762, -0.19991838690396901, 0.011064724694635417, -0.00716535238599455, -0.2151140044773677, 0.04322365313969754, 0.06670254650148186, 0.12118523355850296, 0.015868310023703286, -0.036659217735349726, -0.059713498135474885, 0.021265669763591642, -0.15303929369091182, -0.043829167412744986, 0.08378797228372581, -0.09319986158830894, -0.19640704284648638, 0.37361205651147944, -0.03505867850538846, -0.26107414796747064, 0.11479975164842766, -0.1830346639947714, -0.1701630703551141, 0.010988036623677692, 0.17527659841485926, 0.15656951190652074, -0.08578213176067062, 0.11481217063201994, -0.13486692941168676, 0.09071044301664508, 0.09077744563487736, 0.10808936340696607, 0.16156231048139366, -0.0032786735572625657, 0.06109916480459474, 0.287116123637109, 0.010003577779374412, -0.11869868430988612, -0.2965214596809568, -0.2434868227338066, -0.22425659516876614, 0.13998864496416236, -0.15516659948381759, -0.10306506790220737, 0.48249208373395175, 0.03856602848532635, 0.19673312853115635, 0.05784168280661106, 0.18578307421223536, 0.10961195685573526, 0.024015081017529843, 0.045071303781524706, 0.25329266508688797, 0.1940379455006002, -0.06443376501871122, -0.2040242489845794, 0.05786280714076113, 0.06666923956190413] |
708.2965 | Constraining crystalline color superconducting quark matter with
gravitational-wave data | We estimate the maximum equatorial ellipticity sustainable by compact stars
composed of crystalline color-superconducting quark matter. For the
theoretically allowed range of the gap parameter $\Delta$, the maximum
ellipticity could be as large as $10^{-2}$, which is about 4 orders of
magnitude larger than the tightest upper limit obtained by the recent science
runs of the LIGO and GEO600 gravitational wave detectors based on the data from
78 radio pulsars. We point out that the current gravitational-wave strain upper
limit already has some implications for the gap parameter. In particular, the
upper limit for the Crab pulsar implies that $\Delta$ is less than O(20) MeV
for a range of quark chemical potential accessible in compact stars, assuming
that the pulsar has a mass $1.4 M_{\odot}$, radius 10 km, breaking strain
$10^{-3}$, and that it has the maximum quadrupole deformation it can sustain
without fracturing.
| astro-ph gr-qc hep-ph | we estimate the maximum equatorial ellipticity sustainable by compact stars composed of crystalline colorsuperconducting quark matter for the theoretically allowed range of the gap parameter delta the maximum ellipticity could be as large as 102 which is about 4 orders of magnitude larger than the tightest upper limit obtained by the recent science runs of the ligo and geo600 gravitational wave detectors based on the data from 78 radio pulsars we point out that the current gravitationalwave strain upper limit already has some implications for the gap parameter in particular the upper limit for the crab pulsar implies that delta is less than o20 mev for a range of quark chemical potential accessible in compact stars assuming that the pulsar has a mass 14 m_odot radius 10 km breaking strain 103 and that it has the maximum quadrupole deformation it can sustain without fracturing | [['we', 'estimate', 'the', 'maximum', 'equatorial', 'ellipticity', 'sustainable', 'by', 'compact', 'stars', 'composed', 'of', 'crystalline', 'colorsuperconducting', 'quark', 'matter', 'for', 'the', 'theoretically', 'allowed', 'range', 'of', 'the', 'gap', 'parameter', 'delta', 'the', 'maximum', 'ellipticity', 'could', 'be', 'as', 'large', 'as', '102', 'which', 'is', 'about', '4', 'orders', 'of', 'magnitude', 'larger', 'than', 'the', 'tightest', 'upper', 'limit', 'obtained', 'by', 'the', 'recent', 'science', 'runs', 'of', 'the', 'ligo', 'and', 'geo600', 'gravitational', 'wave', 'detectors', 'based', 'on', 'the', 'data', 'from', '78', 'radio', 'pulsars', 'we', 'point', 'out', 'that', 'the', 'current', 'gravitationalwave', 'strain', 'upper', 'limit', 'already', 'has', 'some', 'implications', 'for', 'the', 'gap', 'parameter', 'in', 'particular', 'the', 'upper', 'limit', 'for', 'the', 'crab', 'pulsar', 'implies', 'that', 'delta', 'is', 'less', 'than', 'o20', 'mev', 'for', 'a', 'range', 'of', 'quark', 'chemical', 'potential', 'accessible', 'in', 'compact', 'stars', 'assuming', 'that', 'the', 'pulsar', 'has', 'a', 'mass', '14', 'm_odot', 'radius', '10', 'km', 'breaking', 'strain', '103', 'and', 'that', 'it', 'has', 'the', 'maximum', 'quadrupole', 'deformation', 'it', 'can', 'sustain', 'without', 'fracturing']] | [-0.12301132748123361, 0.21470255270994837, -0.0224148522037366, 0.09008759615082657, -0.11000904538802085, -0.03661782650225279, 0.08270289773483658, 0.32380281553681317, -0.14503683477717763, -0.3653278954378847, 0.10001867485536625, -0.279459591586298, -0.027762709354040755, 0.27120987624867765, 0.02423678723991745, 0.03531847778423172, 0.06380833162095062, 0.005081207724288106, -0.10820388158188304, -0.19953220831889162, 0.25671543563819593, 0.06508813775467893, 0.20532924843509034, 0.0553411330587955, 0.06285773670485166, -0.062493064203105554, 0.05382291763736349, -0.04931255759503175, -0.18056534653139047, 0.029508577478635643, 0.22206567755670725, 0.10376233942441912, 0.19527088088863012, -0.37404485703963375, -0.20640071864666729, 0.11437383086498205, 0.13725163507640697, 0.05394650439120596, -0.01362890091533902, -0.2773029858750912, 0.11949965186795453, -0.2467995731987887, -0.16808055461701266, 0.019734048284590244, 0.11094809368821895, 0.010854881400721043, -0.23653678168516812, 0.11694611501459601, 0.04001364462358955, 0.01310726638156565, -0.055175831169536754, -0.1789672939404328, -0.036659443058953106, 0.009415976179298013, 0.05050668933027838, 0.11239600982258303, 0.1681681339945903, -0.13543961516956593, -0.03897399312053393, 0.3736144636827198, -0.10153612214849596, -0.07912998951117818, 0.12298446445978091, -0.21890966419757912, -0.12652913674699245, 0.15088394986620793, 0.14468664431802203, 0.08556073439346316, -0.14766851534376554, 0.08590172766303618, 0.0018258700609092354, 0.24880210046447043, 0.14564448113863668, 0.052014390698685825, 0.29206513813955504, 0.20120511210714337, 0.14037768516573124, 0.07244192365962793, -0.19647658725928827, -0.027861152833793312, -0.279160207103511, -0.06957149021844897, -0.19530743183309418, 0.09942773060204975, -0.1812810822413869, -0.07014121518780787, 0.35148643070392105, 0.13912336285445942, 0.14754850089472407, 0.02143207510056931, 0.2589692049692126, 0.13759863668221645, 0.08931926163050877, 0.11317943024591336, 0.3982867357790383, 0.17246082308378796, 0.08160160683069585, -0.17635563346751346, 0.05179121438171327, -0.02039490991996394] |
708.2966 | Quantum fluctuations in the transverse Ising spin glass model: A field
theory of random quantum spin systems | We develop a mean-field theory for random quantum spin systems using the spin
coherent state path integral representation. After the model is reduced to the
mean field one-body Hamiltonian, the integral is analyzed with the aid of
several methods such as the semiclassical method and the gauge transformation.
As an application we consider the Sherrington-Kirkpatrick model in a transverse
field. Using the Landau expansion and its improved versions, we give a detailed
analysis of the imaginary-time dependence of the order parameters. Integrating
out the quantum part of the order parameters, we obtain the effective
renormalized free energy written in terms of the classically defined order
parameters. Our method allows us to obtain the spin glass-paramagnetic phase
transition point $\Gamma/J\sim 1.62$ at T=0.
| cond-mat.dis-nn | we develop a meanfield theory for random quantum spin systems using the spin coherent state path integral representation after the model is reduced to the mean field onebody hamiltonian the integral is analyzed with the aid of several methods such as the semiclassical method and the gauge transformation as an application we consider the sherringtonkirkpatrick model in a transverse field using the landau expansion and its improved versions we give a detailed analysis of the imaginarytime dependence of the order parameters integrating out the quantum part of the order parameters we obtain the effective renormalized free energy written in terms of the classically defined order parameters our method allows us to obtain the spin glassparamagnetic phase transition point gammajsim 162 at t0 | [['we', 'develop', 'a', 'meanfield', 'theory', 'for', 'random', 'quantum', 'spin', 'systems', 'using', 'the', 'spin', 'coherent', 'state', 'path', 'integral', 'representation', 'after', 'the', 'model', 'is', 'reduced', 'to', 'the', 'mean', 'field', 'onebody', 'hamiltonian', 'the', 'integral', 'is', 'analyzed', 'with', 'the', 'aid', 'of', 'several', 'methods', 'such', 'as', 'the', 'semiclassical', 'method', 'and', 'the', 'gauge', 'transformation', 'as', 'an', 'application', 'we', 'consider', 'the', 'sherringtonkirkpatrick', 'model', 'in', 'a', 'transverse', 'field', 'using', 'the', 'landau', 'expansion', 'and', 'its', 'improved', 'versions', 'we', 'give', 'a', 'detailed', 'analysis', 'of', 'the', 'imaginarytime', 'dependence', 'of', 'the', 'order', 'parameters', 'integrating', 'out', 'the', 'quantum', 'part', 'of', 'the', 'order', 'parameters', 'we', 'obtain', 'the', 'effective', 'renormalized', 'free', 'energy', 'written', 'in', 'terms', 'of', 'the', 'classically', 'defined', 'order', 'parameters', 'our', 'method', 'allows', 'us', 'to', 'obtain', 'the', 'spin', 'glassparamagnetic', 'phase', 'transition', 'point', 'gammajsim', '162', 'at', 't0']] | [-0.1200354736763984, 0.13281989781450346, -0.12137281411560252, 0.08143283839841994, -0.034176310460316016, -0.05763300663481156, 0.03114600100767954, 0.33286548148219786, -0.25444342593352, -0.28636292621182896, 0.06677626258266779, -0.2592948459575079, -0.1314910172407205, 0.16960205981740728, 0.03855775299016386, 0.07323384619812714, 0.026263049438906214, 0.08949268768386294, -0.13478455929240832, -0.22308978795384368, 0.29354606848598147, 0.03293550413606378, 0.2459021262184251, 0.033725654891653294, 0.14483058876163948, 0.09943806770606897, 0.01608139871386811, 0.01785703431814909, -0.1766110840641583, 0.09192310418002307, 0.2103299767205802, 0.022788254385037968, 0.2308711206773296, -0.41005465711156525, -0.21336099016868199, 0.06242024733413321, 0.12848908646822868, 0.1645453897692884, 0.01684837772724374, -0.28935116284216444, 0.020140428784846637, -0.21340977104070286, -0.18683986737936115, -0.1382891775884976, -0.06110869147620785, -0.016052313110170264, -0.27273649304115677, 0.08452359224984321, 0.027762812385723614, 0.06385172612499446, -0.07284633668362707, -0.1071962661575526, 0.00984702636487782, 0.13519228434112543, 0.02283505278658898, 0.06439978798443917, 0.12089718253506969, -0.12918727807700633, -0.12049295844044536, 0.369323946434694, -0.11097918898352267, -0.21613356530821573, 0.11967712554420966, -0.10062903786698978, -0.08786614180232087, 0.11352175042654077, 0.11535164210557317, 0.12463410056661814, -0.1603941393084824, 0.14202684838965068, 0.019410226990779243, 0.13335364551094245, -0.011968713991033534, 0.032167819406216346, 0.17410876208432455, 0.1288606129043425, 0.0530680377734825, 0.17142224033984046, -0.09989808652705202, -0.1647547538683284, -0.32754876287654044, -0.1666266915310795, -0.19261312619782983, 0.07117988283377295, -0.11174907561289729, -0.17105854601832107, 0.4605033746765306, 0.1830934656628718, 0.15958331663471956, 0.043926056247437374, 0.2614898762083612, 0.23217632964078802, 0.035709203647760056, 0.04950225700740703, 0.19619290013312518, 0.18404331417987124, 0.09886361066795264, -0.26943003576404106, -0.02964318445689666, 0.1369555877521634] |
708.2967 | The Second Born Corrections to the Electrical and Thermal Conductivities
of Dense Matter in the Liquid Metal Phase | The second Born corrections to the electrical and thermal conductivities are
calculated for the dense matter in the liquid metal phase for various elemental
compositions of astrophysical importance. Inclusion up to the second Born
corrections is sufficiently accurate for the Coulomb scattering of the
electrons by the atomic nuclei with Z < 26. Our approach is semi-analytical,
and is in contrast to that of the previous authors who have used fully
numerical values of the cross section for the Coulomb scattering of the
electron by the atomic nucleus. The merit of the present semi-analytical
approach is that this approach affords us to obtain the results with reliable
Z-dependence and \rho-dependence. The previous fully numerical approach has
made use of the numerical values of the cross section for the scattering of the
electron off the atomic nucleus for a limited number of Z-values, Z=6, 13, 29,
50, 82, and 92, and for a limited number of electron energies, 0.05MeV, 0.1MeV,
0.2MeV, 0.4MeV, 0.7MeV, 1MeV, 2MeV, 4MeV, and 10MeV. Our study, however, has
confirmed that the previous results are sufficiently accurate. They are
recovered, if the terms higher than the second Born terms are taken into
account. We make a detailed comparison of the present results with those of the
previous authors. The numerical results are parameterized in a form of analytic
formulae that would facilitate practical uses of the results. We also extend
our calculations to the case of mixtures of nuclear species. The corresponding
subroutine can be retrieved from
http://www.ph.sophia.ac.jp/~itoh-ken/subroutine/subroutine.htm
| astro-ph | the second born corrections to the electrical and thermal conductivities are calculated for the dense matter in the liquid metal phase for various elemental compositions of astrophysical importance inclusion up to the second born corrections is sufficiently accurate for the coulomb scattering of the electrons by the atomic nuclei with z 26 our approach is semianalytical and is in contrast to that of the previous authors who have used fully numerical values of the cross section for the coulomb scattering of the electron by the atomic nucleus the merit of the present semianalytical approach is that this approach affords us to obtain the results with reliable zdependence and rhodependence the previous fully numerical approach has made use of the numerical values of the cross section for the scattering of the electron off the atomic nucleus for a limited number of zvalues z6 13 29 50 82 and 92 and for a limited number of electron energies 005mev 01mev 02mev 04mev 07mev 1mev 2mev 4mev and 10mev our study however has confirmed that the previous results are sufficiently accurate they are recovered if the terms higher than the second born terms are taken into account we make a detailed comparison of the present results with those of the previous authors the numerical results are parameterized in a form of analytic formulae that would facilitate practical uses of the results we also extend our calculations to the case of mixtures of nuclear species the corresponding subroutine can be retrieved from httpwwwphsophiaacjpitohkensubroutinesubroutinehtm | [['the', 'second', 'born', 'corrections', 'to', 'the', 'electrical', 'and', 'thermal', 'conductivities', 'are', 'calculated', 'for', 'the', 'dense', 'matter', 'in', 'the', 'liquid', 'metal', 'phase', 'for', 'various', 'elemental', 'compositions', 'of', 'astrophysical', 'importance', 'inclusion', 'up', 'to', 'the', 'second', 'born', 'corrections', 'is', 'sufficiently', 'accurate', 'for', 'the', 'coulomb', 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-0.20925654327042242, 0.0569591737532444, 0.045685128682511456] |
708.2968 | Search for strange tribaryon states in the inclusive
^4He(K^{-}_{stopped}, p) reaction | A search for tribaryon states was performed at KEK-PS. We adopted the
$^4$He($K^-_{stopped}, p)$ reaction to populate the states with strangeness -1,
charge 0 and isospin 1. No significant narrow structure was observed in the
mass region from 3000 to 3200 MeV/c^2 in an inclusive missing mass spectrum.
The upper limit of the formation branching ratio was determined to be
($1\sim3)\times 10^{-4}$, ($0.7\sim2)\times 10^{-3}$ and ($2\sim8) \times
10^{-3}$/($stopped K^{-}$) with 95 % confidence level for narrow states with an
assumed width of 0, 20 and 40 MeV/c^2, respectively.
| nucl-ex | a search for tribaryon states was performed at kekps we adopted the 4hek_stopped p reaction to populate the states with strangeness 1 charge 0 and isospin 1 no significant narrow structure was observed in the mass region from 3000 to 3200 mevc2 in an inclusive missing mass spectrum the upper limit of the formation branching ratio was determined to be 1sim3times 104 07sim2times 103 and 2sim8 times 103stopped k with 95 confidence level for narrow states with an assumed width of 0 20 and 40 mevc2 respectively | [['a', 'search', 'for', 'tribaryon', 'states', 'was', 'performed', 'at', 'kekps', 'we', 'adopted', 'the', '4hek_stopped', 'p', 'reaction', 'to', 'populate', 'the', 'states', 'with', 'strangeness', '1', 'charge', '0', 'and', 'isospin', '1', 'no', 'significant', 'narrow', 'structure', 'was', 'observed', 'in', 'the', 'mass', 'region', 'from', '3000', 'to', '3200', 'mevc2', 'in', 'an', 'inclusive', 'missing', 'mass', 'spectrum', 'the', 'upper', 'limit', 'of', 'the', 'formation', 'branching', 'ratio', 'was', 'determined', 'to', 'be', '1sim3times', '104', '07sim2times', '103', 'and', '2sim8', 'times', '103stopped', 'k', 'with', '95', 'confidence', 'level', 'for', 'narrow', 'states', 'with', 'an', 'assumed', 'width', 'of', '0', '20', 'and', '40', 'mevc2', 'respectively']] | [-0.0985046325133625, 0.21443491603181095, -0.006668177680694498, 0.08692136012790043, 0.047699155257560494, -0.11546238933309413, 0.11883692696645129, 0.33666774790688625, -0.13207870958054937, -0.38245485638972465, -0.0012789437882375063, -0.3297293733169393, 0.1015392311042311, 0.09664915102000189, 0.06000804429605501, 0.053983832948000694, 0.02973573649211264, 0.04990688315308767, -0.03443893199437298, -0.16249740715195402, 0.21670968391330594, 0.06758986806735487, 0.20986687402218218, 0.13224188605232573, 0.0325771197051991, -0.06313579910571074, 0.03747616148349352, -0.10200318607796983, -0.20532640761968385, 0.003129983843991351, 0.25243744980998156, 0.08052370893746251, 0.18104004340598406, -0.27476058021278643, -0.06530732458468708, 0.1050187721621336, 0.18309165996771942, 0.01582330048777072, -0.005001685457167829, -0.3287364605746073, 0.16689333130560088, -0.17777306729609646, -0.13596351356132003, 0.0528412273255881, 0.1073808828482359, -0.10734000426103793, -0.29540212295463925, 0.15002541144083187, -0.05422440789094785, 0.06510126014579394, -0.08516044381767421, -0.2683609799572789, -0.07788766980193919, 0.026495508003480186, 0.009111372186098157, 0.09448627856199449, 0.1700576537050216, -0.07672627071033497, -0.10177202101813902, 0.3442806329169288, -0.10737358118839017, -0.12303706533495598, 0.13110027936991395, -0.21364614011424526, -0.14678339061054696, 0.268695729353079, 0.154213148600808, 0.09371054922116966, -0.1329944418954788, 0.051970554979251155, -0.007895024629627786, 0.2812025298296315, 0.09813981454410567, 0.010686155260439747, 0.17417082850957608, 0.17090952717812685, 0.01997935448250756, 0.030795292084093956, -0.21303074312305487, -0.05313942612080676, -0.26963952056518414, -0.08532069139636872, -0.08232809798422883, 0.12362198054324836, -0.0584222412458408, -0.04037478620686182, 0.3468578571862564, 0.07353804633021355, 0.32686464237503526, 0.03635469388795971, 0.22305735696402446, 0.1435002045217538, 0.07754818953448771, 0.0966410357561871, 0.2934809740059214, 0.21843187064613875, 0.08944582112315225, -0.1585834925716016, 0.030603466174996843, -0.06500622852160255] |
708.2969 | Inequivalent quantization in the field of a ferromagnetic wire | We argue that it is possible to bind neutral atom (NA) to the ferromagnetic
wire (FW) by inequivalent quantization of the Hamiltonian. We follow the well
known von Neumann's method of self-adjoint extensions (SAE) to get this
inequivalent quantization, which is characterized by a parameter
\Sigma\in\mathbb{R}({mod}2\pi). There exists a single bound state for the
coupling constant \eta^2\in[0,1). Although this bound state should not occur
due to the existence of classical scale symmetry in the problem. But since
quantization procedure breaks this classical symmetry, bound state comes out as
a scale in the problem leading to scaling anomaly. We also discuss the strong
coupling region \eta^2< 0, which supports bound state making the problem
re-normalizable.
| cond-mat.mtrl-sci hep-th | we argue that it is possible to bind neutral atom na to the ferromagnetic wire fw by inequivalent quantization of the hamiltonian we follow the well known von neumanns method of selfadjoint extensions sae to get this inequivalent quantization which is characterized by a parameter sigmainmathbbrmod2pi there exists a single bound state for the coupling constant eta2in01 although this bound state should not occur due to the existence of classical scale symmetry in the problem but since quantization procedure breaks this classical symmetry bound state comes out as a scale in the problem leading to scaling anomaly we also discuss the strong coupling region eta2 0 which supports bound state making the problem renormalizable | [['we', 'argue', 'that', 'it', 'is', 'possible', 'to', 'bind', 'neutral', 'atom', 'na', 'to', 'the', 'ferromagnetic', 'wire', 'fw', 'by', 'inequivalent', 'quantization', 'of', 'the', 'hamiltonian', 'we', 'follow', 'the', 'well', 'known', 'von', 'neumanns', 'method', 'of', 'selfadjoint', 'extensions', 'sae', 'to', 'get', 'this', 'inequivalent', 'quantization', 'which', 'is', 'characterized', 'by', 'a', 'parameter', 'sigmainmathbbrmod2pi', 'there', 'exists', 'a', 'single', 'bound', 'state', 'for', 'the', 'coupling', 'constant', 'eta2in01', 'although', 'this', 'bound', 'state', 'should', 'not', 'occur', 'due', 'to', 'the', 'existence', 'of', 'classical', 'scale', 'symmetry', 'in', 'the', 'problem', 'but', 'since', 'quantization', 'procedure', 'breaks', 'this', 'classical', 'symmetry', 'bound', 'state', 'comes', 'out', 'as', 'a', 'scale', 'in', 'the', 'problem', 'leading', 'to', 'scaling', 'anomaly', 'we', 'also', 'discuss', 'the', 'strong', 'coupling', 'region', 'eta2', '0', 'which', 'supports', 'bound', 'state', 'making', 'the', 'problem', 'renormalizable']] | [-0.16444613751497986, 0.17562896537544606, -0.06055385033947199, 0.08223899252126492, -0.08078758519176128, -0.2192117638935867, 0.0976055068624971, 0.31096612006825, -0.29678190184391234, -0.28748761400181266, 0.049588634308228005, -0.2466780842431555, -0.11027569974040878, 0.10153608812418367, -0.02950396723281301, 0.03238135421582099, 0.029679086059331894, 0.062151805456129035, -0.08522066244300472, -0.22068567295874736, 0.31756903701794464, 0.046945856135737686, 0.28482603235170245, 0.0930040660688454, 0.08613203637235399, -0.025763595098396763, 0.08436460306672545, -0.007411400342659492, -0.12578616915386323, 0.04177856230879635, 0.2351349680783252, 0.06586715367406473, 0.23844983640758852, -0.39865220702319804, -0.19061273386302804, 0.111077744722674, 0.16098705034736277, 0.16119478182476346, -0.03455039900394955, -0.28623402878708604, 0.04115252018008115, -0.16199416597997437, -0.151367195200042, -0.08728175581200048, 0.007155502062232699, -0.11250630866769436, -0.25689393920142073, 0.13020717271423823, 0.11629971848638629, -0.026720225250755902, -0.056769877441443635, -0.08915440670846562, -0.003060464691121264, 0.06501738762848877, 0.0885842833460109, 0.05611696129407002, 0.09701007179475189, -0.10406180302587538, -0.08888688388313833, 0.37496848018573864, -0.05582183188068614, -0.20372641526877747, 0.15054926088695147, -0.11486183204189208, -0.14417462069832254, 0.10131847145800878, 0.054287497752479145, 0.11166480651289541, -0.10167950805875339, 0.147236970477804, -0.06611861075673785, 0.17339386687880115, 0.07188322146040653, 0.0543402558417126, 0.16530632638439005, 0.10181683797314431, 0.12839757783305167, 0.14315239409916103, -0.042435246370067556, -0.15966240666343115, -0.32207933322726084, -0.14376370518584736, -0.19480328868043476, 0.09846450934972902, -0.016668662990144054, -0.18435348630009685, 0.32936580956863637, 0.14796448795511555, 0.208535214836177, 0.025848539506634034, 0.2323044422363247, 0.1517473562593555, 0.09641747052124369, 0.06667003232619859, 0.2930964322604268, 0.14804254211256712, 0.043679236575761546, -0.2349454339460603, 0.018621031431913643, 0.10498275557516276] |
708.297 | Wightman function and scalar Casimir densities for a wedge with two
cylindrical boundaries | Wightman function, the vacuum expectation values of the field square and the
energy-momentum tensor are investigated for a massive scalar field with general
curvature coupling parameter inside a wedge with two coaxial cylindrical
boundaries. It is assumed that the field obeys Dirichlet boundary condition on
bounding surfaces. The application of a variant of the generalized Abel-Plana
formula enables to extract from the expectation values the contribution
corresponding to the geometry of a wedge with a single shell and to present the
interference part in terms of exponentially convergent integrals. The local
properties of the vacuum are investigated in various asymptotic regions of the
parameters. The vacuum forces acting on the boundaries are presented as the sum
of self-action and interaction terms. It is shown that the interaction forces
between the separate parts of the boundary are always attractive. The
generalization to the case of a scalar field with Neumann boundary condition is
discussed.
| hep-th quant-ph | wightman function the vacuum expectation values of the field square and the energymomentum tensor are investigated for a massive scalar field with general curvature coupling parameter inside a wedge with two coaxial cylindrical boundaries it is assumed that the field obeys dirichlet boundary condition on bounding surfaces the application of a variant of the generalized abelplana formula enables to extract from the expectation values the contribution corresponding to the geometry of a wedge with a single shell and to present the interference part in terms of exponentially convergent integrals the local properties of the vacuum are investigated in various asymptotic regions of the parameters the vacuum forces acting on the boundaries are presented as the sum of selfaction and interaction terms it is shown that the interaction forces between the separate parts of the boundary are always attractive the generalization to the case of a scalar field with neumann boundary condition is discussed | [['wightman', 'function', 'the', 'vacuum', 'expectation', 'values', 'of', 'the', 'field', 'square', 'and', 'the', 'energymomentum', 'tensor', 'are', 'investigated', 'for', 'a', 'massive', 'scalar', 'field', 'with', 'general', 'curvature', 'coupling', 'parameter', 'inside', 'a', 'wedge', 'with', 'two', 'coaxial', 'cylindrical', 'boundaries', 'it', 'is', 'assumed', 'that', 'the', 'field', 'obeys', 'dirichlet', 'boundary', 'condition', 'on', 'bounding', 'surfaces', 'the', 'application', 'of', 'a', 'variant', 'of', 'the', 'generalized', 'abelplana', 'formula', 'enables', 'to', 'extract', 'from', 'the', 'expectation', 'values', 'the', 'contribution', 'corresponding', 'to', 'the', 'geometry', 'of', 'a', 'wedge', 'with', 'a', 'single', 'shell', 'and', 'to', 'present', 'the', 'interference', 'part', 'in', 'terms', 'of', 'exponentially', 'convergent', 'integrals', 'the', 'local', 'properties', 'of', 'the', 'vacuum', 'are', 'investigated', 'in', 'various', 'asymptotic', 'regions', 'of', 'the', 'parameters', 'the', 'vacuum', 'forces', 'acting', 'on', 'the', 'boundaries', 'are', 'presented', 'as', 'the', 'sum', 'of', 'selfaction', 'and', 'interaction', 'terms', 'it', 'is', 'shown', 'that', 'the', 'interaction', 'forces', 'between', 'the', 'separate', 'parts', 'of', 'the', 'boundary', 'are', 'always', 'attractive', 'the', 'generalization', 'to', 'the', 'case', 'of', 'a', 'scalar', 'field', 'with', 'neumann', 'boundary', 'condition', 'is', 'discussed']] | [-0.1749686301781741, 0.1395530433301187, -0.07484779869711478, 0.04992055279899729, -0.07942098414744525, -0.09554919145782204, -0.045972065355825036, 0.31822017551509335, -0.22990592877575336, -0.2548868723238021, 0.09782073501150544, -0.2563029074785756, -0.12156204897240779, 0.14738713170164355, -0.003276015844902182, 0.03444410871970772, 0.024300840556974602, 0.09760211281222748, -0.0697203995629512, -0.19002066576378604, 0.388054405122971, 0.011512089742110203, 0.2853757611451537, 0.08490179985110326, 0.09776930908978387, 0.001724628345079087, 0.01949484474056102, 0.051523089351047296, -0.14029117202847735, 0.10374863222058789, 0.1613814771225603, 0.025478491943871324, 0.2405379402597307, -0.4192281290706174, -0.17823640761282172, 0.08727804986833065, 0.10010115182167223, 0.06365233632656776, -0.005853687619236511, -0.282936606365956, 0.04446043506009029, -0.1291012897223137, -0.16751998120590167, -0.024843248033445644, 0.0022578728872235695, -0.0038581094970877947, -0.3203624758893758, 0.09166926219815912, 0.016252828427146072, 0.005877068005003845, -0.10400083922062775, -0.11260679503217996, -0.028583180169221865, 0.11136665750672323, 0.08975057516496604, 0.025134037986087304, 0.14096031025100766, -0.16775070379786436, -0.038492293466868645, 0.34474438594447243, -0.07213789601795059, -0.28866091988572934, 0.15279966698095104, -0.15865132013591482, -0.019888704830591925, 0.12436592369492537, 0.09476589667458647, 0.13751292364516607, -0.14684972379454017, 0.15168481020848845, -0.013490852873218459, 0.09622089909328745, 0.09566868839213272, 0.0182659188456669, 0.19967176502393985, 0.06548538459525778, 0.05823720224031241, 0.21584419560393478, -0.06742506415059704, -0.15441649716371805, -0.40387930675391476, -0.18020334150916076, -0.19952030067052084, 0.03126923700344134, -0.12360675727274784, -0.24224232779446764, 0.3782043353794447, 0.08790392483572408, 0.19158439943604963, 0.0443399818674996, 0.29566254282942395, 0.1410104911352106, 0.10152518931544977, 0.05099020324026545, 0.2757369826556932, 0.20417588203080192, 0.07985452383306194, -0.22247327368149497, 0.004265850267960428, 0.11308875515162214] |
708.2971 | Indo-European languages tree by Levenshtein distance | The evolution of languages closely resembles the evolution of haploid
organisms. This similarity has been recently exploited \cite{GA,GJ} to
construct language trees. The key point is the definition of a distance among
all pairs of languages which is the analogous of a genetic distance. Many
methods have been proposed to define these distances, one of this, used by
glottochronology, compute distance from the percentage of shared ``cognates''.
Cognates are words inferred to have a common historical origin, and subjective
judgment plays a relevant role in the identification process. Here we push
closer the analogy with evolutionary biology and we introduce a genetic
distance among language pairs by considering a renormalized Levenshtein
distance among words with same meaning and averaging on all the words contained
in a Swadesh list \cite{Sw}. The subjectivity of process is consistently
reduced and the reproducibility is highly facilitated. We test our method
against the Indo-European group considering fifty different languages and the
two hundred words of the Swadesh list for any of them. We find out a tree which
closely resembles the one published in \cite{GA} with some significant
differences.
| physics.soc-ph physics.data-an q-bio.PE | the evolution of languages closely resembles the evolution of haploid organisms this similarity has been recently exploited citegagj to construct language trees the key point is the definition of a distance among all pairs of languages which is the analogous of a genetic distance many methods have been proposed to define these distances one of this used by glottochronology compute distance from the percentage of shared cognates cognates are words inferred to have a common historical origin and subjective judgment plays a relevant role in the identification process here we push closer the analogy with evolutionary biology and we introduce a genetic distance among language pairs by considering a renormalized levenshtein distance among words with same meaning and averaging on all the words contained in a swadesh list citesw the subjectivity of process is consistently reduced and the reproducibility is highly facilitated we test our method against the indoeuropean group considering fifty different languages and the two hundred words of the swadesh list for any of them we find out a tree which closely resembles the one published in citega with some significant differences | [['the', 'evolution', 'of', 'languages', 'closely', 'resembles', 'the', 'evolution', 'of', 'haploid', 'organisms', 'this', 'similarity', 'has', 'been', 'recently', 'exploited', 'citegagj', 'to', 'construct', 'language', 'trees', 'the', 'key', 'point', 'is', 'the', 'definition', 'of', 'a', 'distance', 'among', 'all', 'pairs', 'of', 'languages', 'which', 'is', 'the', 'analogous', 'of', 'a', 'genetic', 'distance', 'many', 'methods', 'have', 'been', 'proposed', 'to', 'define', 'these', 'distances', 'one', 'of', 'this', 'used', 'by', 'glottochronology', 'compute', 'distance', 'from', 'the', 'percentage', 'of', 'shared', 'cognates', 'cognates', 'are', 'words', 'inferred', 'to', 'have', 'a', 'common', 'historical', 'origin', 'and', 'subjective', 'judgment', 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708.2972 | The inverse fallacy and quantum formalism | In the present article we consider the inverse fallacy, a well known
cognitive heuristic experimentally tested in cognitive science, which occurs
for intuitive judgments in situations of bounded rationality. We show that the
quantum formalism can be used to describe in a very simple and general way this
fallacy within the quantum formalism. Thus we suggest that in cognitive science
the formalism of quantum mechanics can be used to describe a quantum regime,
the bounded-rationality regime, where the cognitive heuristics are valid.
| physics.gen-ph | in the present article we consider the inverse fallacy a well known cognitive heuristic experimentally tested in cognitive science which occurs for intuitive judgments in situations of bounded rationality we show that the quantum formalism can be used to describe in a very simple and general way this fallacy within the quantum formalism thus we suggest that in cognitive science the formalism of quantum mechanics can be used to describe a quantum regime the boundedrationality regime where the cognitive heuristics are valid | [['in', 'the', 'present', 'article', 'we', 'consider', 'the', 'inverse', 'fallacy', 'a', 'well', 'known', 'cognitive', 'heuristic', 'experimentally', 'tested', 'in', 'cognitive', 'science', 'which', 'occurs', 'for', 'intuitive', 'judgments', 'in', 'situations', 'of', 'bounded', 'rationality', 'we', 'show', 'that', 'the', 'quantum', 'formalism', 'can', 'be', 'used', 'to', 'describe', 'in', 'a', 'very', 'simple', 'and', 'general', 'way', 'this', 'fallacy', 'within', 'the', 'quantum', 'formalism', 'thus', 'we', 'suggest', 'that', 'in', 'cognitive', 'science', 'the', 'formalism', 'of', 'quantum', 'mechanics', 'can', 'be', 'used', 'to', 'describe', 'a', 'quantum', 'regime', 'the', 'boundedrationality', 'regime', 'where', 'the', 'cognitive', 'heuristics', 'are', 'valid']] | [-0.06435866077947316, 0.11627522754914514, -0.12249922878733586, 0.13739104937938065, -0.09285781293448697, -0.1830993491940473, 0.04512134562076137, 0.3683152672403106, -0.2735809198149094, -0.28185298384689705, -0.003919109233609605, -0.15106922473826603, -0.2767442407131922, 0.20723335525850062, -0.1261558530926023, 0.04108673256890076, 0.022792274609389828, 0.0578448599567864, -0.01835220201557116, -0.20351377969164763, 0.270040484554157, 0.04165471872746399, 0.2767171800113851, 0.08271225596346506, 0.06354787361967128, -0.0018829311879150139, 0.03378334813524128, 0.05041755930089006, -0.13912925200352996, 0.10612911880924934, 0.4072244920222679, 0.19960192370614627, 0.2974851911932957, -0.4545960090145832, -0.23996836391118606, 0.04911855095003664, 0.15011368766313465, 0.1388565984756186, -0.00946630440970383, -0.3017052324238892, 0.05019343587521623, -0.20683519081382945, -0.12332536677670915, -0.08415536890260694, -0.03001110433322582, -0.046260292391951494, -0.22642100579673197, 0.051594431568845744, 0.0688134463540869, 0.053661071161580524, -0.027979361319278435, -0.04748975800026617, 0.12838656084169064, 0.11795047331010787, -0.022303266855376976, -0.00791432645467178, 0.14001040566122022, -0.13400714517934476, -0.19760962481406041, 0.43251600641212085, 0.00679894520832998, -0.20452410023568607, 0.17818149084384302, -0.12322651974220829, -0.1722593474622089, -0.013481272178667984, 0.16177785747525533, 0.12230221866970746, -0.15039860541228114, 0.12253506068728023, -0.03253575494206261, 0.12053879881959136, 0.03049266045606445, 0.02777944949083598, 0.1923553144173106, 0.1343333693789091, 0.005691810431549462, 0.13694002790796775, -0.03396198608367363, -0.16662951835243758, -0.33232147331071293, -0.15498870569642417, -0.18940269216190933, 0.09003764557902043, -0.017755469250338003, -0.11789205649913084, 0.3579614084759137, 0.22411126917137242, 0.1332496448260982, 0.07603334670846645, 0.2825666723273149, 0.14758189846676342, 0.022691506597145302, 0.06697992872583067, 0.26066138000204797, 0.09452905309409267, 0.10495749286307794, -0.19341461142672725, 0.07482786816204103, -0.006139439762968899] |
708.2973 | Detecting q-Gaussian distributions and the normalization effect | We show that whenever data are gathered using a device that performs a
normalization-preprocessing, the ensuing normalized input, as recorded by the
measurement device, will always be q-Gaussian distributed if the incoming data
exhibit elliptical symmetry. As a consequence, great care should be exercised
when detecting q-Gaussians. As an example, Gaussian data will appear, after
normalization, in the guise of q-Gaussian records. Moreover, we show that the
value of the resulting parameter q can be deduced from the normalization
technique that characterizes the device.
| cond-mat.stat-mech | we show that whenever data are gathered using a device that performs a normalizationpreprocessing the ensuing normalized input as recorded by the measurement device will always be qgaussian distributed if the incoming data exhibit elliptical symmetry as a consequence great care should be exercised when detecting qgaussians as an example gaussian data will appear after normalization in the guise of qgaussian records moreover we show that the value of the resulting parameter q can be deduced from the normalization technique that characterizes the device | [['we', 'show', 'that', 'whenever', 'data', 'are', 'gathered', 'using', 'a', 'device', 'that', 'performs', 'a', 'normalizationpreprocessing', 'the', 'ensuing', 'normalized', 'input', 'as', 'recorded', 'by', 'the', 'measurement', 'device', 'will', 'always', 'be', 'qgaussian', 'distributed', 'if', 'the', 'incoming', 'data', 'exhibit', 'elliptical', 'symmetry', 'as', 'a', 'consequence', 'great', 'care', 'should', 'be', 'exercised', 'when', 'detecting', 'qgaussians', 'as', 'an', 'example', 'gaussian', 'data', 'will', 'appear', 'after', 'normalization', 'in', 'the', 'guise', 'of', 'qgaussian', 'records', 'moreover', 'we', 'show', 'that', 'the', 'value', 'of', 'the', 'resulting', 'parameter', 'q', 'can', 'be', 'deduced', 'from', 'the', 'normalization', 'technique', 'that', 'characterizes', 'the', 'device']] | [-0.09063878632992146, 0.1376946314298674, -0.1638323013973703, 0.0686384053530553, -0.050358530150793765, -0.1653735561195357, 0.021956792336899834, 0.3949239171861884, -0.2901760280491358, -0.3062737114188901, 0.12842699453088802, -0.2727679096397955, -0.14712566078965922, 0.25564800839624313, -0.09559941727174334, 0.023203936652336495, 0.1219735150842602, 0.07618829329688866, -0.06622713966945927, -0.21563005153403944, 0.2905328351771459, 0.05547308569482292, 0.30644148519733944, -0.014361168126048273, 0.07081439025582274, 0.03447521637272404, 0.006030772066484374, 0.0646085758659854, -0.06612111293291392, 0.014966134144644061, 0.28205790487679105, 0.19143273241548653, 0.2683379403483796, -0.3970605923558574, -0.1863176612497633, 0.1321203468524548, 0.16543538556490317, 0.07945225273921008, -0.04969005951382983, -0.28408050016466396, 0.10780813821019178, -0.17686800538921302, -0.15511452157544084, -0.11020929065756696, 0.007699929665863873, 0.03395768098465829, -0.2993270802291963, 0.08078832309749202, 0.07263248290092382, 0.02045010866776827, -0.03119132122311023, -0.09885059896273067, -0.08561331511710782, 0.12138485006254492, 0.044534817472638856, -0.0012836711739290909, 0.17985540663357824, -0.11130139580086233, -0.07072056060185633, 0.3588013133954212, -0.04633715971518891, -0.18192840172595018, 0.03873768699052463, -0.15364910546039423, -0.11739307529775493, 0.07329995463411491, 0.1365925371198051, 0.030263264955257076, -0.14992669839443531, 0.0382712288613779, -0.06256526043212199, 0.17990512066487088, 0.06368939609390246, 0.030895219644509166, 0.17187049782958375, 0.09699511961136238, 0.046707405787275495, 0.14844970557283252, -0.13930360037631478, -0.0235138381326414, -0.3278716415705451, -0.11531840495944741, -0.24305598038327264, 0.08399835486155767, -0.09073902985238168, -0.10581909667655647, 0.33503885434783365, 0.1533731645539807, 0.25201644146455876, 0.017412221435098404, 0.27288654776492033, 0.16189342067459128, 0.10339835930772755, 0.051589278518278374, 0.20696232129023018, 0.04425390980890896, 0.10779468839741256, -0.15135494714703815, 0.09374477210979212, -0.03149561153679906] |
708.2974 | The Fuzzy Vault for fingerprints is Vulnerable to Brute Force Attack | The \textit{fuzzy vault} approach is one of the best studied and well
accepted ideas for binding cryptographic security into biometric
authentication. The vault has been implemented in connection with fingerprint
data by Uludag and Jain. We show that this instance of the vault is vulnerable
to brute force attack. An interceptor of the vault data can recover both secret
and template data using only generally affordable computational resources. Some
possible alternatives are then discussed and it is suggested that cryptographic
security may be preferable to the one - way function approach to biometric
security.
| cs.CV cs.CR | the textitfuzzy vault approach is one of the best studied and well accepted ideas for binding cryptographic security into biometric authentication the vault has been implemented in connection with fingerprint data by uludag and jain we show that this instance of the vault is vulnerable to brute force attack an interceptor of the vault data can recover both secret and template data using only generally affordable computational resources some possible alternatives are then discussed and it is suggested that cryptographic security may be preferable to the one way function approach to biometric security | [['the', 'textitfuzzy', 'vault', 'approach', 'is', 'one', 'of', 'the', 'best', 'studied', 'and', 'well', 'accepted', 'ideas', 'for', 'binding', 'cryptographic', 'security', 'into', 'biometric', 'authentication', 'the', 'vault', 'has', 'been', 'implemented', 'in', 'connection', 'with', 'fingerprint', 'data', 'by', 'uludag', 'and', 'jain', 'we', 'show', 'that', 'this', 'instance', 'of', 'the', 'vault', 'is', 'vulnerable', 'to', 'brute', 'force', 'attack', 'an', 'interceptor', 'of', 'the', 'vault', 'data', 'can', 'recover', 'both', 'secret', 'and', 'template', 'data', 'using', 'only', 'generally', 'affordable', 'computational', 'resources', 'some', 'possible', 'alternatives', 'are', 'then', 'discussed', 'and', 'it', 'is', 'suggested', 'that', 'cryptographic', 'security', 'may', 'be', 'preferable', 'to', 'the', 'one', 'way', 'function', 'approach', 'to', 'biometric', 'security']] | [-0.10824065793888991, -0.028747891783196183, -0.1328126637387898, 0.12271904835098801, -0.1063743097666692, -0.2885844237938687, 0.059673178961480056, 0.3744338323863653, -0.27773537101981405, -0.32803823750793604, 0.14263143030553033, -0.2889257472284793, -0.1330388059320215, 0.22804825169617657, -0.16396032823863757, 0.15249860413106425, -0.02295760719289819, 0.025020439802044697, 0.040404100503560136, -0.32271726841905285, 0.30104219136698235, 0.08199261273206263, 0.32694408048844925, 0.06617801655390924, 0.04988510276134648, -0.014615281909745146, -0.03359581901599745, -0.04106692737480114, -0.07120986470960945, 0.1278068078170111, 0.32999835391324217, 0.2383969813600633, 0.2884265951259614, -0.38539567241281436, -0.16706986794923687, 0.06220817648560054, 0.14593478789102737, 0.1358161963481497, -0.0893364942908942, -0.30802771071059076, 0.12039831290942626, -0.2386930020178085, -0.07957821098350726, -0.15408482190712794, 0.00520242378115654, -0.011471638665790413, -0.25591572251293687, -0.02108535533361546, 0.01344200126074541, 0.05460069082411272, -0.0003582203663517158, -0.08851157907642178, -0.018775911195776783, 0.14823556659170067, 0.06102674968980744, 0.04219832687362374, 0.15139410738925357, -0.08665817208680232, -0.16358204247880276, 0.39593573399706855, 0.022294691743349637, -0.17539359436493243, 0.17833537891875584, -0.0023603025301881546, -0.14000239842673662, 0.09494611780558314, 0.10650462252957808, 0.0674233753003876, -0.18293958417764242, 0.009120996302034666, -0.045740764311791124, 0.23317377171018622, 0.08136042139933004, 0.05628285866107915, 0.1294940981993472, 0.16077439435808868, 0.050162166817584536, 0.13334092540170098, -0.08716607918696744, -0.10741248406318865, -0.18676326098943968, -0.16180986405483314, -0.23348383557378918, -0.02399157688717593, -0.038011397678369224, -0.1054450326936913, 0.34463701601866836, 0.23037296221565948, 0.11610880293525182, 0.023870157384937935, 0.44120538506943446, 0.047599125581865125, 0.14201226220517368, 0.09501441236160654, 0.22588568702653553, 0.00444650112211213, 0.07105928333987901, -0.09711632491242918, 0.16127472452737474, 0.04352710801074384] |
708.2975 | Neutrino flavor oscillations in background matter | We study the evolution of two mixed Dirac neutrinos in an external
axial-vector field. The dynamics of this system is described in the framework
of relativistic wave equations approach on the basis of the known solutions of
the Dirac equation in an external field with a given initial condition. The
general solution of the initial condition problem, exactly accounting for the
external field, is obtained. Then we consider special form of the external
field which corresponds to the standard model neutrino interactions with the
background matter. In this limit we derive the transition probability and
compare it with the previously known results.
| hep-ph hep-th | we study the evolution of two mixed dirac neutrinos in an external axialvector field the dynamics of this system is described in the framework of relativistic wave equations approach on the basis of the known solutions of the dirac equation in an external field with a given initial condition the general solution of the initial condition problem exactly accounting for the external field is obtained then we consider special form of the external field which corresponds to the standard model neutrino interactions with the background matter in this limit we derive the transition probability and compare it with the previously known results | [['we', 'study', 'the', 'evolution', 'of', 'two', 'mixed', 'dirac', 'neutrinos', 'in', 'an', 'external', 'axialvector', 'field', 'the', 'dynamics', 'of', 'this', 'system', 'is', 'described', 'in', 'the', 'framework', 'of', 'relativistic', 'wave', 'equations', 'approach', 'on', 'the', 'basis', 'of', 'the', 'known', 'solutions', 'of', 'the', 'dirac', 'equation', 'in', 'an', 'external', 'field', 'with', 'a', 'given', 'initial', 'condition', 'the', 'general', 'solution', 'of', 'the', 'initial', 'condition', 'problem', 'exactly', 'accounting', 'for', 'the', 'external', 'field', 'is', 'obtained', 'then', 'we', 'consider', 'special', 'form', 'of', 'the', 'external', 'field', 'which', 'corresponds', 'to', 'the', 'standard', 'model', 'neutrino', 'interactions', 'with', 'the', 'background', 'matter', 'in', 'this', 'limit', 'we', 'derive', 'the', 'transition', 'probability', 'and', 'compare', 'it', 'with', 'the', 'previously', 'known', 'results']] | [-0.16048786405693083, 0.12347526943074841, -0.06080734126518626, 0.08138003269228719, -0.032500596607432646, -0.09281113690367955, -0.008057976789845555, 0.3064921896393393, -0.23869025425793713, -0.3116992706177281, 0.05828422661322881, -0.2429085311082685, -0.1344606904815152, 0.1410837733670704, 0.03695752410053769, 0.0364602806238348, 0.02536315131959889, 0.09969875370563172, -0.07207051391585492, -0.21389494237590434, 0.3977187753508927, 0.02257341873265949, 0.2546762195415795, 0.008735517290986929, 0.11361099175159253, 0.014697628960871668, 0.0051382262277982985, 0.01211063698043718, -0.12123412805308095, 0.05440933299684605, 0.14047272577333977, 0.09692751371995638, 0.21679065733527145, -0.4329696343663861, -0.2152116356289708, 0.09239784932202276, 0.10568494099539284, 0.17004442305701292, -0.05845731711037932, -0.3146174270522726, 0.03421871195428585, -0.16583814449133535, -0.217481455637836, -0.014352210151378577, -0.026081181172391072, 0.022627750418477637, -0.3086723634224458, 0.07740325546439956, 0.047966167339872495, -0.0027570875142427054, -0.1625390626654467, -0.09163656477204651, 0.008013214505113223, 0.08891358580348976, 0.09152752396139298, 0.05437933773888896, 0.07567679777275771, -0.20645519671961665, -0.07352858449003714, 0.41454984141769363, -0.11230020288049299, -0.23970945109384975, 0.13953947937846475, -0.15868129924524063, -0.0935142388768202, 0.10205363659941427, 0.15435864670914323, 0.12880033886461867, -0.19309693426076396, 0.1402291262006032, -0.07001302540790194, 0.11983515114943478, 0.02797089877775779, -0.007434340588196053, 0.19210836667494446, 0.15929704737466047, 0.05167345694887141, 0.14402137939845594, -0.05265618414006324, -0.1041252490489141, -0.36053272990473345, -0.13726830250565328, -0.14767468972679446, 0.07347233259326244, -0.07793677216564081, -0.18805813809455024, 0.4007647889826045, 0.1750168452934161, 0.1502710755859666, 0.004866500988867426, 0.2757291902157971, 0.20199463552083163, -0.0027520691555942976, 0.07762341052305191, 0.27399929361783115, 0.18003567381004126, 0.09519686189699261, -0.23962493342639624, -0.011796871551732514, 0.06499542358020942] |
708.2976 | Voltage and temperature dependencies of conductivity in gated graphene | The resistivity of gated graphene is studied taking into account electron and
hole scattering by short- and long-range structural imperfections the
characteristics of disorder were taken from the scanning tunneling microscopy
data and by acoustic phonons. The calculations are based on the quasiclassical
kinetic equation with the normalization condition fixed by surface charge. The
gate-voltage and temperature effects on the resistance peak, which is centered
at the point of intrinsic conductivity, are found to be in agreement with the
transport measurements.
| cond-mat.mtrl-sci cond-mat.mes-hall | the resistivity of gated graphene is studied taking into account electron and hole scattering by short and longrange structural imperfections the characteristics of disorder were taken from the scanning tunneling microscopy data and by acoustic phonons the calculations are based on the quasiclassical kinetic equation with the normalization condition fixed by surface charge the gatevoltage and temperature effects on the resistance peak which is centered at the point of intrinsic conductivity are found to be in agreement with the transport measurements | [['the', 'resistivity', 'of', 'gated', 'graphene', 'is', 'studied', 'taking', 'into', 'account', 'electron', 'and', 'hole', 'scattering', 'by', 'short', 'and', 'longrange', 'structural', 'imperfections', 'the', 'characteristics', 'of', 'disorder', 'were', 'taken', 'from', 'the', 'scanning', 'tunneling', 'microscopy', 'data', 'and', 'by', 'acoustic', 'phonons', 'the', 'calculations', 'are', 'based', 'on', 'the', 'quasiclassical', 'kinetic', 'equation', 'with', 'the', 'normalization', 'condition', 'fixed', 'by', 'surface', 'charge', 'the', 'gatevoltage', 'and', 'temperature', 'effects', 'on', 'the', 'resistance', 'peak', 'which', 'is', 'centered', 'at', 'the', 'point', 'of', 'intrinsic', 'conductivity', 'are', 'found', 'to', 'be', 'in', 'agreement', 'with', 'the', 'transport', 'measurements']] | [-0.13116012419355505, 0.1743170713975646, -0.08867740231554633, 0.019966096620155888, -0.007705072047372843, -0.154585421729235, 0.049072790775235374, 0.38974014646661137, -0.2596071674316018, -0.2828135285526514, 0.02775828627564795, -0.3855012070249628, -0.08925447741776336, 0.20790033952769948, 0.03477271251886347, 0.04838276599292402, -0.009471336195682302, -0.04603936059262465, -0.06955593355850857, -0.20104990292478492, 0.3221460009729605, 0.08409806035666002, 0.35443675656009604, 0.13205537749569357, 0.06285177760636779, 0.06598854306970298, 0.018575153302079365, 0.08694460740985556, -0.15622768544212537, 0.01740314659697038, 0.20001561106125146, -0.12109270019249783, 0.18490716461437168, -0.5066666943883454, -0.2582450541049633, -0.057752527566741645, 0.08616221885852239, 0.13397097935250465, -0.057492891835324744, -0.2965831908592839, 0.04292719458218342, -0.05887908472415106, -0.054390662217535725, -0.0724207231786424, -0.007845761668350961, 0.034592510407997504, -0.21937205137133045, 0.14988859414042513, 0.009576166318844498, 0.07137476476000976, -0.1290831361713325, -0.10310784876375333, -0.09524048359512731, 0.08421171895216828, 0.06922100943133787, 0.014635748494370484, 0.19880519754736237, -0.08590641993753335, -0.060346665895647474, 0.3511470644562333, -0.04712882341909004, -0.12130221832589602, 0.11589362185137968, -0.20699371298039218, -0.003147805075126666, 0.18945597899203867, 0.090778204365231, 0.04909982462701054, -0.2138815030720039, 0.089903595176077, 0.04298145269952071, 0.14291186285396337, 0.07287364066750915, 0.0813134562239061, 0.24093876631332584, 0.19531230938931307, -0.03759384008460782, 0.0863701854645631, -0.1902807176094804, -0.0025401406886952894, -0.2595281841946237, -0.0969047985430577, -0.21714585760240385, 0.10398804826408993, -0.0793243519218788, -0.16056953249844136, 0.3840408436379131, 0.14216802856111668, 0.23001984347025922, -0.0220936712116164, 0.3055720715826653, 0.18986045728857273, 0.09882289809922193, 0.017767325446101618, 0.22678752331477073, 0.18494831547600987, 0.11033213611715185, -0.3266529741173863, 0.07908557759551907, 0.010872401676520153] |
708.2977 | Two Component Model of Dark Energy | We consider the possibility that the dark energy is made up of two or more
independent components, each having a different equation of state. We fit the
model with supernova and gamma-ray burst (GRB) data from resent observations,
and use the Markov Chain Monte Carlo (MCMC) technique to estimate the allowed
parameter regions. We also use various model selection criteria to compare the
two component model with the LCDM, one component dark energy model with static
or variable w(XCDM), and with other multi-component models. We find that the
two component models can give reasonably good fit to the current data. For some
data sets, and depending somewhat on the model selection criteria, the two
component model can give better fit to the data than XCDM with static w and
XCDM with variable w parameterized by w = w_0 + w_az/(1+z).
| astro-ph | we consider the possibility that the dark energy is made up of two or more independent components each having a different equation of state we fit the model with supernova and gammaray burst grb data from resent observations and use the markov chain monte carlo mcmc technique to estimate the allowed parameter regions we also use various model selection criteria to compare the two component model with the lcdm one component dark energy model with static or variable wxcdm and with other multicomponent models we find that the two component models can give reasonably good fit to the current data for some data sets and depending somewhat on the model selection criteria the two component model can give better fit to the data than xcdm with static w and xcdm with variable w parameterized by w w_0 w_az1z | [['we', 'consider', 'the', 'possibility', 'that', 'the', 'dark', 'energy', 'is', 'made', 'up', 'of', 'two', 'or', 'more', 'independent', 'components', 'each', 'having', 'a', 'different', 'equation', 'of', 'state', 'we', 'fit', 'the', 'model', 'with', 'supernova', 'and', 'gammaray', 'burst', 'grb', 'data', 'from', 'resent', 'observations', 'and', 'use', 'the', 'markov', 'chain', 'monte', 'carlo', 'mcmc', 'technique', 'to', 'estimate', 'the', 'allowed', 'parameter', 'regions', 'we', 'also', 'use', 'various', 'model', 'selection', 'criteria', 'to', 'compare', 'the', 'two', 'component', 'model', 'with', 'the', 'lcdm', 'one', 'component', 'dark', 'energy', 'model', 'with', 'static', 'or', 'variable', 'wxcdm', 'and', 'with', 'other', 'multicomponent', 'models', 'we', 'find', 'that', 'the', 'two', 'component', 'models', 'can', 'give', 'reasonably', 'good', 'fit', 'to', 'the', 'current', 'data', 'for', 'some', 'data', 'sets', 'and', 'depending', 'somewhat', 'on', 'the', 'model', 'selection', 'criteria', 'the', 'two', 'component', 'model', 'can', 'give', 'better', 'fit', 'to', 'the', 'data', 'than', 'xcdm', 'with', 'static', 'w', 'and', 'xcdm', 'with', 'variable', 'w', 'parameterized', 'by', 'w', 'w_0', 'w_az1z']] | [-0.03899991168102989, 0.0820835647515624, -0.09849656998481163, 0.10508802980064716, -0.12336212607538875, -0.21194878058261513, 0.049121833180406076, 0.4207569949383683, -0.2466026597574134, -0.36870028954752554, 0.07752524186542038, -0.2973085738828077, 0.0095131016239654, 0.19113657145541818, 0.05407080698676188, 0.02172117802204893, 0.09281045549056109, -0.013144951368517736, -0.041842199242262935, -0.25079033740364726, 0.32517781587290195, 0.06688279481536216, 0.2530799730677031, -0.06327923897462075, 0.09607671166304499, -0.013349278535529533, -0.06657801364952534, -0.027231495723219055, -0.18546608385258878, 0.0817040690282524, 0.17623791057715554, 0.12924610841406214, 0.18106124264544204, -0.39436863467220545, -0.2579279839787084, 0.17977050392929575, 0.12108544014592874, 0.08862403230673141, 0.006919923225081327, -0.25188729153288636, 0.0342685657173313, -0.2199586557214977, -0.11987042979008573, -0.05228274703532567, -0.04719340231488733, 0.030904397415510817, -0.2795986885971883, 0.10138313613146345, -0.005050416746491785, -0.022817088527303627, -0.09249844571561827, -0.1446067139006439, -0.038865666902411784, 0.025402420443510088, 0.07905444867313183, 0.03802431776763543, 0.08301433564766365, -0.1366498207618647, -0.11372756282798946, 0.37742828959873054, -0.11649752128751596, -0.2038572647554033, 0.2065868516014341, -0.10005818428266246, -0.15368263489525655, 0.08012271292254274, 0.11396215358913384, 0.053435094004003876, -0.16061039795578622, 0.03858793110317921, -0.013570814018534934, 0.19966562575427815, -0.04602609723395504, -0.026532302022668076, 0.2040080293903456, 0.15278226689106839, 0.028135196426881198, 0.11767199673897052, -0.1506590897898765, -0.08560373066746466, -0.30686360746468005, -0.07884235207251657, -0.11792872745119144, 0.010175552814924979, -0.15565701484667763, -0.150350750567775, 0.4116206839612192, 0.16755524533180854, 0.2490975703455179, 0.06485402443692745, 0.29138854754102583, 0.08662536805016263, 0.018661447517736046, 0.07922371176263208, 0.21886848569064407, 0.09539612352005754, 0.05098949577180011, -0.15825299521641092, 0.06500075595720452, -0.003179487443583853] |
708.2978 | Entanglement Entropy in Extended Quantum Systems | After a brief introduction to the concept of entanglement in quantum systems,
I apply these ideas to many-body systems and show that the von Neumann entropy
is an effective way of characterising the entanglement between the degrees of
freedom in different regions of space. Close to a quantum phase transition it
has universal features which serve as a diagnostic of such phenomena. In the
second part I consider the unitary time evolution of such systems following a
`quantum quench' in which a parameter in the hamiltonian is suddenly changed,
and argue that finite regions should effectively thermalise at late times,
after interesting transient effects.
| cond-mat.stat-mech quant-ph | after a brief introduction to the concept of entanglement in quantum systems i apply these ideas to manybody systems and show that the von neumann entropy is an effective way of characterising the entanglement between the degrees of freedom in different regions of space close to a quantum phase transition it has universal features which serve as a diagnostic of such phenomena in the second part i consider the unitary time evolution of such systems following a quantum quench in which a parameter in the hamiltonian is suddenly changed and argue that finite regions should effectively thermalise at late times after interesting transient effects | [['after', 'a', 'brief', 'introduction', 'to', 'the', 'concept', 'of', 'entanglement', 'in', 'quantum', 'systems', 'i', 'apply', 'these', 'ideas', 'to', 'manybody', 'systems', 'and', 'show', 'that', 'the', 'von', 'neumann', 'entropy', 'is', 'an', 'effective', 'way', 'of', 'characterising', 'the', 'entanglement', 'between', 'the', 'degrees', 'of', 'freedom', 'in', 'different', 'regions', 'of', 'space', 'close', 'to', 'a', 'quantum', 'phase', 'transition', 'it', 'has', 'universal', 'features', 'which', 'serve', 'as', 'a', 'diagnostic', 'of', 'such', 'phenomena', 'in', 'the', 'second', 'part', 'i', 'consider', 'the', 'unitary', 'time', 'evolution', 'of', 'such', 'systems', 'following', 'a', 'quantum', 'quench', 'in', 'which', 'a', 'parameter', 'in', 'the', 'hamiltonian', 'is', 'suddenly', 'changed', 'and', 'argue', 'that', 'finite', 'regions', 'should', 'effectively', 'thermalise', 'at', 'late', 'times', 'after', 'interesting', 'transient', 'effects']] | [-0.1177326888562395, 0.21509345026830629, -0.13726594526983368, 0.05370405799252554, 0.013383554411120713, -0.15897235844302207, 0.024649179979370765, 0.29255306393651365, -0.2779936914403851, -0.24227081252432142, 0.08958585887963776, -0.2694161896271488, -0.15540401272189158, 0.1727156043679525, -0.049350637602261625, 0.028412510658829257, 0.037752877231329106, 0.05905978369096724, -0.11013040644600271, -0.2305191490785756, 0.33526029501025245, 0.04168655898068279, 0.23445832874858752, 0.05871300979141289, 0.08479266867596799, -0.003937576785504531, 0.02862626178494583, 0.02724334350848669, -0.13851180433392493, 0.027361551895200346, 0.275528956652404, 0.11423896009532306, 0.2984229846848533, -0.42242144817366634, -0.2454679847623293, 0.0942945855002528, 0.1357613056495141, 0.15913885395499305, -0.005013709798311958, -0.2947786142870497, 0.004076477921514127, -0.19984412454785064, -0.14483528761551356, -0.06267933630890464, 0.0892936417232984, -0.037806959957099304, -0.21461398436804302, 0.08351130968003417, 0.08817620626023899, 0.05330979322584776, -0.006074259419479999, -0.0036684845556290103, 0.017496906140317712, 0.1416515515705284, -0.006409343699208246, 0.010842321624155514, 0.1405630124679122, -0.14149512226308267, -0.09857456863392144, 0.3729102916549891, -0.04161342385878715, -0.11842641584091605, 0.21159908994517396, -0.13067093891843867, -0.15169699687752514, 0.07532116995963196, 0.1398493129751072, 0.09631694439583673, -0.12668049450104052, 0.07004318687988696, 0.03762471736766971, 0.14758978631848899, -0.013472180500125082, 0.10238933149510278, 0.2664450615478787, 0.11415488403648712, 0.07305523581229724, 0.176532160759402, -0.02425552101340145, -0.15448095122925365, -0.3325351988001225, -0.19812436036479014, -0.19897181203570932, 0.07468952551313962, -0.07071344982446484, -0.15135734216220534, 0.4292759735074539, 0.14971950705624365, 0.22975705516560432, -0.028114312458246086, 0.24169092122554922, 0.122692728709528, 0.06266368208106052, 0.06223152636980208, 0.23468579323469804, 0.1134267091894379, 0.10987745134983785, -0.24882462771431443, 0.02090893892231039, 0.08414999378146604] |
708.2979 | Phase coexistence of cluster crystals: beyond the Gibbs phase rule | We report a study of the phase behavior of multiple-occupancy crystals
through simulation. We argue that in order to reproduce the equilibrium
behavior of such crystals it is essential to treat the number of lattice sites
as a constraining thermodynamic variable. The resulting free-energy
calculations thus differ considerably from schemes used for single-occupancy
lattices. Using our approach, we obtain the phase diagram and the bulk modulus
for a generalized exponential model that forms cluster crystals at high
densities. We compare the simulation results with existing theoretical
predictions. We also identify two types of density fluctuations that can lead
to two sound modes and evaluate the corresponding elastic constants.
| cond-mat.soft | we report a study of the phase behavior of multipleoccupancy crystals through simulation we argue that in order to reproduce the equilibrium behavior of such crystals it is essential to treat the number of lattice sites as a constraining thermodynamic variable the resulting freeenergy calculations thus differ considerably from schemes used for singleoccupancy lattices using our approach we obtain the phase diagram and the bulk modulus for a generalized exponential model that forms cluster crystals at high densities we compare the simulation results with existing theoretical predictions we also identify two types of density fluctuations that can lead to two sound modes and evaluate the corresponding elastic constants | [['we', 'report', 'a', 'study', 'of', 'the', 'phase', 'behavior', 'of', 'multipleoccupancy', 'crystals', 'through', 'simulation', 'we', 'argue', 'that', 'in', 'order', 'to', 'reproduce', 'the', 'equilibrium', 'behavior', 'of', 'such', 'crystals', 'it', 'is', 'essential', 'to', 'treat', 'the', 'number', 'of', 'lattice', 'sites', 'as', 'a', 'constraining', 'thermodynamic', 'variable', 'the', 'resulting', 'freeenergy', 'calculations', 'thus', 'differ', 'considerably', 'from', 'schemes', 'used', 'for', 'singleoccupancy', 'lattices', 'using', 'our', 'approach', 'we', 'obtain', 'the', 'phase', 'diagram', 'and', 'the', 'bulk', 'modulus', 'for', 'a', 'generalized', 'exponential', 'model', 'that', 'forms', 'cluster', 'crystals', 'at', 'high', 'densities', 'we', 'compare', 'the', 'simulation', 'results', 'with', 'existing', 'theoretical', 'predictions', 'we', 'also', 'identify', 'two', 'types', 'of', 'density', 'fluctuations', 'that', 'can', 'lead', 'to', 'two', 'sound', 'modes', 'and', 'evaluate', 'the', 'corresponding', 'elastic', 'constants']] | [-0.09309450263662317, 0.1375094060209432, -0.13278242339441013, 0.04755042047374751, -0.029175543065278607, -0.09048868829349631, 0.0879987160605596, 0.3754634521205292, -0.24259378422469458, -0.2820714064395038, 0.06555002069461952, -0.30148340266406815, -0.1457755744790307, 0.18485027916781674, 0.045354809383557085, 0.04856217216491421, 0.03137524121780401, 0.0005808602757403783, -0.10353299691320057, -0.20876881676926234, 0.2870505705201633, 0.029840047095867447, 0.31596719788683353, 0.04375794636538235, 0.05898755801423827, -0.02255072867254091, 0.021699540665216534, 0.06353727820825493, -0.2198700212130827, 0.09769122722157751, 0.23596393937358162, 0.015213251348898232, 0.173457731222995, -0.4463990740934996, -0.2348859156275203, 0.08776143785113487, 0.13505070178691192, 0.15238651400867187, -0.024051742380154187, -0.20103057947827974, 0.08573370371187959, -0.16691879514892038, -0.16632146706856857, -0.14591949633714335, -0.05397539114509927, 0.04995776743575861, -0.25375434140909775, 0.10247357614707228, -0.006874613594437871, 0.020872566872317165, -0.09624821267082034, -0.13075529563319044, -0.020047168125546425, 0.10727160865284294, 0.04113227254863411, -0.008463032043182125, 0.12531422909401427, -0.13097433679867437, -0.11076579934038291, 0.40475634255698906, -0.06631095777592126, -0.1622840124051844, 0.2061461010669297, -0.13598396036900126, -0.13067311224762665, 0.11963163009000437, 0.15535924149346408, 0.09425571479042556, -0.10263689470729817, 0.020194636874344793, -0.0019242576079739032, 0.180904005003536, 0.030703066395613078, 0.049560167287067275, 0.17652276211698914, 0.1492344022001723, -0.005712894257158041, 0.18090044994725385, -0.08702147498326464, -0.12064190462414419, -0.2945650591401853, -0.15769235868981787, -0.16438751601587945, -9.235998215240853e-05, -0.10612800415299581, -0.17628330339581888, 0.38670261487991453, 0.18563372882683632, 0.1996674041979659, 0.06855497912669153, 0.22999578972007625, 0.09832714750892788, 0.0409859635249198, 0.03293731990268957, 0.25192269128442646, 0.12604308308528683, 0.06162430632807245, -0.2577219625051508, 0.05233273744609242, 0.056167153276015666] |
708.298 | Astrophysical Configurations with Background Cosmology: Probing Dark
Energy at Astrophysical Scales | We explore the effects of a positive cosmological constant on astrophysical
and cosmological configurations described by a polytropic equation of state. We
derive the conditions for equilibrium and stability of such configurations and
consider some astrophysical examples where our analysis may be relevant. We
show that in the presence of the cosmological constant the isothermal sphere is
not a viable astrophysical model since the density in this model does not go
asymptotically to zero. The cosmological constant implies that, for polytropic
index smaller than five, the central density has to exceed a certain minimal
value in terms of the vacuum density in order to guarantee the existence of a
finite size object. We examine such configurations together with effects of
$\Lambda$ in other exotic possibilities, such as neutrino and boson stars, and
we compare our results to N-body simulations. The astrophysical properties and
configurations found in this article are specific features resulting from the
existence of a dark energy component. Hence, if found in nature would be an
independent probe of a cosmological constant, complementary to other
observations.
| astro-ph gr-qc | we explore the effects of a positive cosmological constant on astrophysical and cosmological configurations described by a polytropic equation of state we derive the conditions for equilibrium and stability of such configurations and consider some astrophysical examples where our analysis may be relevant we show that in the presence of the cosmological constant the isothermal sphere is not a viable astrophysical model since the density in this model does not go asymptotically to zero the cosmological constant implies that for polytropic index smaller than five the central density has to exceed a certain minimal value in terms of the vacuum density in order to guarantee the existence of a finite size object we examine such configurations together with effects of lambda in other exotic possibilities such as neutrino and boson stars and we compare our results to nbody simulations the astrophysical properties and configurations found in this article are specific features resulting from the existence of a dark energy component hence if found in nature would be an independent probe of a cosmological constant complementary to other observations | [['we', 'explore', 'the', 'effects', 'of', 'a', 'positive', 'cosmological', 'constant', 'on', 'astrophysical', 'and', 'cosmological', 'configurations', 'described', 'by', 'a', 'polytropic', 'equation', 'of', 'state', 'we', 'derive', 'the', 'conditions', 'for', 'equilibrium', 'and', 'stability', 'of', 'such', 'configurations', 'and', 'consider', 'some', 'astrophysical', 'examples', 'where', 'our', 'analysis', 'may', 'be', 'relevant', 'we', 'show', 'that', 'in', 'the', 'presence', 'of', 'the', 'cosmological', 'constant', 'the', 'isothermal', 'sphere', 'is', 'not', 'a', 'viable', 'astrophysical', 'model', 'since', 'the', 'density', 'in', 'this', 'model', 'does', 'not', 'go', 'asymptotically', 'to', 'zero', 'the', 'cosmological', 'constant', 'implies', 'that', 'for', 'polytropic', 'index', 'smaller', 'than', 'five', 'the', 'central', 'density', 'has', 'to', 'exceed', 'a', 'certain', 'minimal', 'value', 'in', 'terms', 'of', 'the', 'vacuum', 'density', 'in', 'order', 'to', 'guarantee', 'the', 'existence', 'of', 'a', 'finite', 'size', 'object', 'we', 'examine', 'such', 'configurations', 'together', 'with', 'effects', 'of', 'lambda', 'in', 'other', 'exotic', 'possibilities', 'such', 'as', 'neutrino', 'and', 'boson', 'stars', 'and', 'we', 'compare', 'our', 'results', 'to', 'nbody', 'simulations', 'the', 'astrophysical', 'properties', 'and', 'configurations', 'found', 'in', 'this', 'article', 'are', 'specific', 'features', 'resulting', 'from', 'the', 'existence', 'of', 'a', 'dark', 'energy', 'component', 'hence', 'if', 'found', 'in', 'nature', 'would', 'be', 'an', 'independent', 'probe', 'of', 'a', 'cosmological', 'constant', 'complementary', 'to', 'other', 'observations']] | [-0.11916353975244787, 0.13747437233362003, -0.08666467477876191, 0.08278312281119439, -0.0756165963150247, -0.10413844084754335, 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708.2981 | A stabilization theorem for dynamics of continuous opinions | A stabilization theorem for processes of opinion dynamics is presented. The
theorem is applicable to a wide class of models of continuous opinion dynamics
based on averaging (like the models of Hegselmann-Krause and
Weisbuch-Deffuant). The analysis detects self-confidence as a driving force of
stabilization.
| physics.soc-ph | a stabilization theorem for processes of opinion dynamics is presented the theorem is applicable to a wide class of models of continuous opinion dynamics based on averaging like the models of hegselmannkrause and weisbuchdeffuant the analysis detects selfconfidence as a driving force of stabilization | [['a', 'stabilization', 'theorem', 'for', 'processes', 'of', 'opinion', 'dynamics', 'is', 'presented', 'the', 'theorem', 'is', 'applicable', 'to', 'a', 'wide', 'class', 'of', 'models', 'of', 'continuous', 'opinion', 'dynamics', 'based', 'on', 'averaging', 'like', 'the', 'models', 'of', 'hegselmannkrause', 'and', 'weisbuchdeffuant', 'the', 'analysis', 'detects', 'selfconfidence', 'as', 'a', 'driving', 'force', 'of', 'stabilization']] | [-0.1365946295078505, 0.08184878206388517, -0.14577842354562812, 0.07471861117201942, -0.04909757503562353, -0.1405488362810998, 0.04398309786550023, 0.32011509009382944, -0.24449492220512845, -0.23141300055960362, 0.14217430018206043, -0.19584310837936672, -0.14431975383988835, 0.23818884377198463, -0.04702306282706559, 0.006378311790864576, 0.03556224890053272, 0.04225669441406022, 0.04477679045786234, -0.18085460117171434, 0.3200468635186553, -0.0005509107537694614, 0.28270425321534276, 0.038174245580607516, 0.16115649755705486, 0.0601846099386669, -0.021560521711680023, 0.0027793376621874895, -0.10669634002260864, 0.10357266617938876, 0.20307194814830093, 0.11820085472638973, 0.3440466487610882, -0.3348341483453458, -0.27222456063397904, 0.10148703012700108, 0.07273686300455169, 0.13322889881039207, -0.02700371403956193, -0.29556336118416354, 0.037526338043707336, -0.1497079530646178, -0.15130989232354544, -0.10282182240520012, 0.03244548187781633, 0.11209394869563932, -0.3121494748206301, 0.10831357701681554, 0.15696230311137202, 0.09114293597469275, -0.11232346304776994, -0.02137800759043206, -0.020223600139037113, 0.12673541935245422, 0.023035073875110935, 0.007107198754304342, 0.19553464026698333, -0.15209624816568315, -0.1914305631917986, 0.4164557614448396, -0.11043362781955776, -0.19861279317939823, 0.21284962564558638, -0.045230003920468415, -0.18692038884513418, 0.1013846006244421, 0.19690866154533895, 0.1676354801695032, -0.12273532086559995, 0.058838972143183295, -0.026754725047133186, 0.19032924063503742, -0.022022014250978827, -0.01694760386916724, 0.14259470331440258, 0.2596508485413241, 0.09049597287296572, 0.10840077219869602, -0.05114612344715914, -0.24805326971479438, -0.27455538289028814, -0.10587221415798095, -0.16837950903837653, 0.05849535126418976, -0.06045801899447476, -0.1990749740877866, 0.41439596824982966, 0.14407281333114952, 0.1433774252972481, 0.09592852102253925, 0.25129311633380974, 0.09916212756599468, 0.020590815036980945, -0.01436093663373454, 0.18910337137905034, 0.15419189568439667, 0.09711589091669091, -0.17806338290789758, 0.09062518169891766, 0.11250512562268837] |
708.2982 | ILC Positron Production Target Simulation | A photon-positron conversion target of the undulator or laser based polarized
positron source is optimized using a modified GEANT-3 program adapted to count
the spin transfer. High intensity positron beam with around 0.75 polarisation
could be achieved choosing tungsten conversion target of 0.3 and 0.7 radiation
lengths for the undulator and laser case respectively.
| physics.ins-det | a photonpositron conversion target of the undulator or laser based polarized positron source is optimized using a modified geant3 program adapted to count the spin transfer high intensity positron beam with around 075 polarisation could be achieved choosing tungsten conversion target of 03 and 07 radiation lengths for the undulator and laser case respectively | [['a', 'photonpositron', 'conversion', 'target', 'of', 'the', 'undulator', 'or', 'laser', 'based', 'polarized', 'positron', 'source', 'is', 'optimized', 'using', 'a', 'modified', 'geant3', 'program', 'adapted', 'to', 'count', 'the', 'spin', 'transfer', 'high', 'intensity', 'positron', 'beam', 'with', 'around', '075', 'polarisation', 'could', 'be', 'achieved', 'choosing', 'tungsten', 'conversion', 'target', 'of', '03', 'and', '07', 'radiation', 'lengths', 'for', 'the', 'undulator', 'and', 'laser', 'case', 'respectively']] | [-0.033089604426421365, 0.20581990933783775, -0.045806663954314195, 0.0630412675233839, -0.01694608360247792, -0.19992139297625366, 0.035166661202345254, 0.5128651906929489, -0.2463707266867442, -0.3649315905739676, 0.0017145716339209169, -0.27640227340864687, 0.1333686458605851, 0.26405584351335354, 0.03189483291979106, 0.07508334970839743, 0.025820702944776782, -0.09818228889906884, -0.06467946286682251, -0.15530281470877663, 0.2008056164771881, 0.1942909389453114, 0.3327668677699172, 0.04625159640849199, 0.18984125055513293, 0.05233374644808893, 0.018122438376523414, -0.07946060991512155, -0.044243333883196956, 0.0843961531085507, 0.2517760311437876, 0.07813261011791117, 0.1493113302397278, -0.37421628634252074, -0.18147190410714104, 0.053037191811456996, 0.10489316669486042, 0.08603092768001107, -0.10124367110888069, -0.2187141737733739, 0.0427844227063206, -0.17172673696054602, -0.11343333471285284, 0.032906728181636556, -0.03975768181723806, 0.07782630058761053, -0.3073199167496191, -0.04712152664707798, 0.0021287955888459145, 0.03510613758819846, -0.07288762580005909, -0.13567643189135026, -0.03461552393745701, -0.01547723181352441, -0.00793274715630654, 0.1695585936694494, 0.23633583079812662, -0.09629178630574695, -0.11614081115936334, 0.370999815487215, -0.10421441527048372, -0.14238210372134763, 0.02551968831937971, -0.2046014848428796, -0.0007798989162833061, 0.26013358127114905, 0.17375136993140122, 0.1386844012853338, -0.09021880461851943, -0.04365328472889608, 0.05509330454844771, 0.2647345341952904, 0.2213475321120811, 0.006412158544474053, 0.2698192179273322, 0.22170576797622554, -0.0014729262593219865, 0.1667544730512847, -0.2655862810195617, 0.056439133255549195, -0.2538238330480625, -0.10171279428913346, -0.15318993788282825, 0.11613604834276901, -0.04131756525185785, -0.04325660836513875, 0.39176423833617624, 0.058500880814807595, 0.10527168361926978, -0.04079878713303017, 0.3314623052148886, 0.13520369993276754, 0.035829968504467104, 0.004396493397301661, 0.2590416523645509, 0.1427262508231303, 0.11354445553613159, -0.2504888318988653, 0.027635182192513964, -0.053256938831423815] |
708.2983 | Velocity fluctuations in a one dimensional Inelastic Maxwell model | We consider the velocity fluctuations of a system of particles described by
the Inelastic Maxwell Model. The present work extends the methods, previously
employed to obtain the one-particle velocity distribution function, to the
study of the two particle correlations. Results regarding both the homogeneous
cooling process and the steady state driven regime are presented. In particular
we obtain the form of the pair correlation function in the scaling region of
the homogeneous cooling process and show that some of its moments diverge. This
fact has repercussions on the behavior of the energy fluctuations of the model.
| cond-mat.stat-mech cond-mat.soft | we consider the velocity fluctuations of a system of particles described by the inelastic maxwell model the present work extends the methods previously employed to obtain the oneparticle velocity distribution function to the study of the two particle correlations results regarding both the homogeneous cooling process and the steady state driven regime are presented in particular we obtain the form of the pair correlation function in the scaling region of the homogeneous cooling process and show that some of its moments diverge this fact has repercussions on the behavior of the energy fluctuations of the model | [['we', 'consider', 'the', 'velocity', 'fluctuations', 'of', 'a', 'system', 'of', 'particles', 'described', 'by', 'the', 'inelastic', 'maxwell', 'model', 'the', 'present', 'work', 'extends', 'the', 'methods', 'previously', 'employed', 'to', 'obtain', 'the', 'oneparticle', 'velocity', 'distribution', 'function', 'to', 'the', 'study', 'of', 'the', 'two', 'particle', 'correlations', 'results', 'regarding', 'both', 'the', 'homogeneous', 'cooling', 'process', 'and', 'the', 'steady', 'state', 'driven', 'regime', 'are', 'presented', 'in', 'particular', 'we', 'obtain', 'the', 'form', 'of', 'the', 'pair', 'correlation', 'function', 'in', 'the', 'scaling', 'region', 'of', 'the', 'homogeneous', 'cooling', 'process', 'and', 'show', 'that', 'some', 'of', 'its', 'moments', 'diverge', 'this', 'fact', 'has', 'repercussions', 'on', 'the', 'behavior', 'of', 'the', 'energy', 'fluctuations', 'of', 'the', 'model']] | [-0.12800171733639823, 0.13312634521571454, -0.11800253488278638, 0.06120063091433773, 0.017400380175483104, -0.0447179372907461, 0.009380917421367485, 0.31451221151898306, -0.26408257011886843, -0.27197953894695576, 0.056952938376828875, -0.2877041285391897, -0.10562376963207498, 0.16582799487150623, 0.05263905145420722, 0.0468274509372956, 0.023963097887948, 0.039786035490881964, -0.055827931045011304, -0.21783701313931184, 0.37013003664227045, 0.06571479652969477, 0.29821105961309513, 0.0582600774068851, 0.1026503741304623, 0.010289595079181405, -0.02494813691494831, 0.012814637383902058, -0.17042723163505494, 0.06565394714319457, 0.14638077038762276, 0.06333520291749058, 0.2310814678009289, -0.404024398594629, -0.2379929231586478, 0.10984769105076946, 0.15057585892403344, 0.09857470418743712, -0.030068275612090172, -0.260241926938761, -0.003144398591151306, -0.1746829650461829, -0.18910708780458663, -0.060038202177869, -0.012883672471313426, 0.07525358175917063, -0.24992905116717642, 0.12547767306872024, 0.11745042880890348, 0.0015196291885028284, -0.09804438182739734, -0.10256389544398796, 0.0008833785880900299, 0.12166670934918027, 0.06352494654189893, 0.008546703871009717, 0.1492997385939816, -0.17307673375338103, -0.07144128438994812, 0.3500746881278853, -0.07708693704383525, -0.19455439058947377, 0.17529025906696916, -0.206904814884183, -0.08955405315888736, 0.12265923003239247, 0.16827889356257705, 0.11676807582261972, -0.15758379508042708, 0.07752074586831743, -0.02854362777240264, 0.12191620942030568, -0.006168846201035194, 0.03229438171668638, 0.1673459560649159, 0.1568731676937508, 0.009872629433327043, 0.1779580347671678, -0.11377695649328719, -0.1414136069943197, -0.32054236546779674, -0.15453854258036395, -0.1893560524622444, 0.01297872539726086, -0.05647458287391297, -0.16398174728965387, 0.396128171790527, 0.1665257434748734, 0.2331366785413896, 0.05805634875044537, 0.25416184455389157, 0.18806570328888483, 0.00407234256757268, 0.07772742817420901, 0.2843189258677133, 0.14720886102441, 0.1280327299440008, -0.2780655312235467, 0.06664232921806008, 0.03766686593007762] |
708.2984 | Are neutron stars with crystalline colour superconducting cores
interesting for the LIGO experiment? | We estimate the maximal deformation that can be sustained by a rotating
neutron star with a crystalline colour superconducting quark core. Our results
suggest that current gravitational-wave data from LIGO have already reached the
level where a detection would have been possible over a wide range of the
poorly constrained QCD parameters. This leads to the non-trivial conclusion
that compact objects \emph{do not} contain maximally strained colour
crystalline cores drawn from this range of parameter space. We discuss the
uncertainties associated with our simple model and how it can be improved in
the future.
| gr-qc astro-ph | we estimate the maximal deformation that can be sustained by a rotating neutron star with a crystalline colour superconducting quark core our results suggest that current gravitationalwave data from ligo have already reached the level where a detection would have been possible over a wide range of the poorly constrained qcd parameters this leads to the nontrivial conclusion that compact objects emphdo not contain maximally strained colour crystalline cores drawn from this range of parameter space we discuss the uncertainties associated with our simple model and how it can be improved in the future | [['we', 'estimate', 'the', 'maximal', 'deformation', 'that', 'can', 'be', 'sustained', 'by', 'a', 'rotating', 'neutron', 'star', 'with', 'a', 'crystalline', 'colour', 'superconducting', 'quark', 'core', 'our', 'results', 'suggest', 'that', 'current', 'gravitationalwave', 'data', 'from', 'ligo', 'have', 'already', 'reached', 'the', 'level', 'where', 'a', 'detection', 'would', 'have', 'been', 'possible', 'over', 'a', 'wide', 'range', 'of', 'the', 'poorly', 'constrained', 'qcd', 'parameters', 'this', 'leads', 'to', 'the', 'nontrivial', 'conclusion', 'that', 'compact', 'objects', 'emphdo', 'not', 'contain', 'maximally', 'strained', 'colour', 'crystalline', 'cores', 'drawn', 'from', 'this', 'range', 'of', 'parameter', 'space', 'we', 'discuss', 'the', 'uncertainties', 'associated', 'with', 'our', 'simple', 'model', 'and', 'how', 'it', 'can', 'be', 'improved', 'in', 'the', 'future']] | [-0.05811925702715946, 0.18830125325141436, -0.09805598349726581, 0.03863798518060766, -0.10649988736382666, -0.054403462932702706, 0.06886615832658247, 0.4091801235174879, -0.20430216182796088, -0.31746336091012556, 0.10518619739524822, -0.2299996289880352, -0.0896415017189785, 0.22141564581691822, -0.06073287656986492, 0.021244629479429507, 0.09968632023702277, 0.0065086949715747475, -0.11033613444120187, -0.2540548509692753, 0.3076617358985575, 0.019611154331211397, 0.22360520060372321, 0.04239064697275295, 0.04353895178312396, -0.05928900195384755, 0.014362245721326388, 0.04061234753765909, -0.1326227163077187, 0.06854240728066639, 0.28493152823029183, 0.10833067032890926, 0.1788025955927182, -0.4025391871803143, -0.26224357252841457, 0.135798370757913, 0.1308033855339671, 0.12058939276500902, -0.06873733741528493, -0.29475383854847637, 0.14353047121945334, -0.24727359946143437, -0.13030461887234546, -0.08551857279157861, 0.010114196458318398, 0.009803998476622547, -0.23264114832891983, 0.05394869431496618, 0.028221594466966517, -0.022072801425894524, -0.056778909321478076, -0.12193708031616629, -0.05748063541869534, 0.07696801918915454, 0.01855931172340593, 0.10910055558030009, 0.1618806130272594, -0.14512541450243047, -0.10470117510301358, 0.3718757158284016, -0.047279476891569, -0.1497892859451314, 0.17378576171951013, -0.18902476563395815, -0.1627385103158613, 0.13157627967859994, 0.1552493614689546, 0.11816058448079894, -0.13143611528187435, 0.046200737495227975, -0.055482383112750076, 0.2188823748023269, 0.048825314823300284, 0.05010677580325369, 0.3172129179806785, 0.20227674567239715, 0.03853156780229604, 0.10260689128289356, -0.12544323002704064, -0.05413324058989677, -0.30432739469936076, -0.07074356026590821, -0.1607107539175752, 0.06375655534871026, -0.11974462280727978, -0.14191342969524098, 0.3716442507141805, 0.16258976159696567, 0.1972795030216072, -0.006518865618458453, 0.23456354748378408, 0.09607826609243737, 0.12787949069938126, 0.062367903831553585, 0.32687699906230766, 0.1059487564910322, 0.05529710182181976, -0.196755186411889, 0.05022338853078954, -0.049530729698512625] |
708.2985 | Suppression of vortex channeling in meandered YBa2Cu3O7-d grain
boundaries | We report on the in-plane magnetic field (H) dependence of the critical
current density (Jc) in meandered and planar single grain boundaries (GBs)
isolated in YBa2Cu3O7-d (YBCO) coated conductors. The Jc(H)properties of the
planar GB are consistent with those previously seen in single GBs of YBCO films
grown on SrTiO3 bi-crystals. In the straight boundary a characteristic flux
channeling regime when H is oriented near the GB plane, associated with a
reduced Jc, is seen. The meandered GB does not show vortex channeling since it
is not possible for a sufficient length of vortex line to lie within it.
| cond-mat.supr-con | we report on the inplane magnetic field h dependence of the critical current density jc in meandered and planar single grain boundaries gbs isolated in yba2cu3o7d ybco coated conductors the jchproperties of the planar gb are consistent with those previously seen in single gbs of ybco films grown on srtio3 bicrystals in the straight boundary a characteristic flux channeling regime when h is oriented near the gb plane associated with a reduced jc is seen the meandered gb does not show vortex channeling since it is not possible for a sufficient length of vortex line to lie within it | [['we', 'report', 'on', 'the', 'inplane', 'magnetic', 'field', 'h', 'dependence', 'of', 'the', 'critical', 'current', 'density', 'jc', 'in', 'meandered', 'and', 'planar', 'single', 'grain', 'boundaries', 'gbs', 'isolated', 'in', 'yba2cu3o7d', 'ybco', 'coated', 'conductors', 'the', 'jchproperties', 'of', 'the', 'planar', 'gb', 'are', 'consistent', 'with', 'those', 'previously', 'seen', 'in', 'single', 'gbs', 'of', 'ybco', 'films', 'grown', 'on', 'srtio3', 'bicrystals', 'in', 'the', 'straight', 'boundary', 'a', 'characteristic', 'flux', 'channeling', 'regime', 'when', 'h', 'is', 'oriented', 'near', 'the', 'gb', 'plane', 'associated', 'with', 'a', 'reduced', 'jc', 'is', 'seen', 'the', 'meandered', 'gb', 'does', 'not', 'show', 'vortex', 'channeling', 'since', 'it', 'is', 'not', 'possible', 'for', 'a', 'sufficient', 'length', 'of', 'vortex', 'line', 'to', 'lie', 'within', 'it']] | [-0.193936877142714, 0.16436646393101131, 0.02050318426157975, -0.05090320793726501, -0.052437848772625535, -0.13699052119342497, 0.04025536824530941, 0.45992277110261576, -0.20669197256923938, -0.28151263161657414, 0.031654957045173765, -0.23922873333058492, -0.04986773085381303, 0.2620064670467103, -0.03261415042904947, 0.03186860889177389, -0.010037593073116578, 0.01609602080045116, -0.0578510084157401, -0.26410290174072193, 0.25559688484467263, 0.02055643378562123, 0.38182762040927704, 0.07634731116514577, 0.013026397974629487, -0.034212998665717184, 0.10110488066174166, 0.08343648208704378, -0.22526028084245567, 0.02613017235333765, 0.22020533768346115, -0.14415975977970782, 0.09700657091844751, -0.47470184421280814, -0.2115400350814191, 0.01741807605615076, 0.1551022447636161, 0.1119453050101138, -0.021907484731446877, -0.20793591513849644, 0.09652038564791485, -0.040242104981170625, -0.14082623562865834, 0.07407493307255208, 0.026303701335564256, 0.0025594516429213844, -0.19001404239739084, 0.06972196683933844, 0.0845317725301245, 0.117665074017298, -0.07150426237577838, -0.1116512155359877, -0.14611267942783177, -0.026810042579998073, -0.009661031380884958, 0.1249032386516848, 0.21233727981108336, -0.15580939809905783, -0.08452641947803144, 0.3209042068076681, -0.01678537255704251, -0.11373778757857805, 0.14487110683516294, -0.2456514278203439, -0.07680198395795816, 0.2357293634879764, 0.0710308279804125, 0.10453511009049811, -0.09393186827159929, 0.1191054342180367, -0.057428082332433183, 0.1644282778725028, 0.13963872910600764, -0.04197583359913254, 0.24364570427533924, 0.2055722300915941, 0.0393472257906533, 0.16346773044301235, -0.17564854636249055, -0.013333771323751924, -0.2673656470760019, -0.20406072698438502, -0.17125425537767802, 0.08456644073291444, -0.08107765040782694, -0.2537527898497575, 0.3062621328447546, 0.11196651803899785, 0.1899222425720892, -0.08370615113336517, 0.2015368670405706, 0.0704277426791995, 0.1538300709798932, 0.08360102169728857, 0.2264576677294752, 0.1712470636287305, 0.13237187080085278, -0.226256237237011, 0.09189461307524115, -0.0139908124478914] |
708.2986 | On the Security of the Ping-Pong Protocol | We briefly review the security of the ping-pong protocol in light of several
attack scenarios suggested by various authors since the proposal of the
protocol. We refute one recent attack on an ideal quantum channel, and show
that a recent claim of falseness of our original security proof is erroneous.
| quant-ph | we briefly review the security of the pingpong protocol in light of several attack scenarios suggested by various authors since the proposal of the protocol we refute one recent attack on an ideal quantum channel and show that a recent claim of falseness of our original security proof is erroneous | [['we', 'briefly', 'review', 'the', 'security', 'of', 'the', 'pingpong', 'protocol', 'in', 'light', 'of', 'several', 'attack', 'scenarios', 'suggested', 'by', 'various', 'authors', 'since', 'the', 'proposal', 'of', 'the', 'protocol', 'we', 'refute', 'one', 'recent', 'attack', 'on', 'an', 'ideal', 'quantum', 'channel', 'and', 'show', 'that', 'a', 'recent', 'claim', 'of', 'falseness', 'of', 'our', 'original', 'security', 'proof', 'is', 'erroneous']] | [-0.18809219679795205, 0.009927808738138992, -0.128373978510499, 0.03719506402732804, -0.02652311881072819, -0.22664263769052923, 0.11067095569800585, 0.30123675033450126, -0.1953995544370264, -0.28220829196274283, 0.13025875537423418, -0.23917173802852632, -0.20096758849918842, 0.21977787708863616, -0.19619263922795654, 0.11614631611853837, 0.044370066393166784, -0.002674761824309826, 0.012404144569300115, -0.37673903841525314, 0.36716748401522636, 0.059069118582410735, 0.3096137438714504, 0.13199929920956494, 0.030132312113419175, 0.038338503949344155, -0.09262999773025513, -0.05451150121050887, -0.13852551725300144, 0.1076352606061846, 0.2038414107169956, 0.23302366520278156, 0.2975094233453274, -0.42908308390527966, -0.20428226036950947, 0.03115613772533834, 0.0959144949587062, 0.19348562022671104, -0.08460856343852356, -0.340000266097486, 0.08519744385033846, -0.2778393978998065, -0.13057704188628122, -0.017487488090991973, 0.018905102722346783, 0.002645725719630718, -0.18680252919672058, -0.02598989880643785, 0.12495603669434786, 0.03782174337655306, 0.023130867339204997, -0.07986762060318142, 0.0615838938136585, 0.03544246885925531, 0.08308755843900144, -0.008297439645975829, 0.1258600449282676, -0.10599669412709772, -0.2348720104759559, 0.29613485738635065, -0.0024196944385766984, -0.11641221918165684, 0.1630586042732466, -0.03221214230172336, -0.17898017719388007, 0.035079015595838425, 0.1127963824942708, 0.08961000161245465, -0.0914179045893252, 0.023694179243175312, -0.11203429846093059, 0.1681787319947034, 0.05615457920357585, 0.07990268518216909, 0.14780820704996586, 0.15198668025783263, 0.04325601888820529, 0.11774528691545129, -0.05200155075173825, -0.1266618450731039, -0.3288099363446236, -0.20195612095296384, -0.22895779171958566, 0.06331156259402633, -0.018443252187862528, -0.06603067938238383, 0.3998048883676529, 0.2657322130352259, 0.16327750807628036, -0.004560228772461415, 0.3770635053515434, -0.006483831617515534, -0.0262439658830408, 0.06713567393831908, 0.2843344647064805, 0.07906785846222192, 0.1099801663029939, -0.15443835224956273, 0.1438129006838426, 0.0407540045119822] |
708.2987 | On the Low-lying zeros of Hasse-Weil L-functions for Elliptic Curves | In this paper, we obtain an unconditional density theorem concerning the
low-lying zeros of Hasse-Weil L-functions for a family of elliptic curves. From
this together with the Riemann hypothesis for these L-functions, we infer the
majorant of 27/14 (which is strictly less than 2) for the average rank of the
elliptic curves in the family under consideration. This upper bound for the
average rank enables us to deduce that, under the same assumption, a positive
proportion of elliptic curves have algebraic ranks equaling their analytic
ranks and finite Tate-Shafarevic group. Statements of this flavor were known
previously under the additional assumptions of GRH for Dirichlet L-functions
and symmetric square L-functions which are removed in the present paper.
| math.NT | in this paper we obtain an unconditional density theorem concerning the lowlying zeros of hasseweil lfunctions for a family of elliptic curves from this together with the riemann hypothesis for these lfunctions we infer the majorant of 2714 which is strictly less than 2 for the average rank of the elliptic curves in the family under consideration this upper bound for the average rank enables us to deduce that under the same assumption a positive proportion of elliptic curves have algebraic ranks equaling their analytic ranks and finite tateshafarevic group statements of this flavor were known previously under the additional assumptions of grh for dirichlet lfunctions and symmetric square lfunctions which are removed in the present paper | [['in', 'this', 'paper', 'we', 'obtain', 'an', 'unconditional', 'density', 'theorem', 'concerning', 'the', 'lowlying', 'zeros', 'of', 'hasseweil', 'lfunctions', 'for', 'a', 'family', 'of', 'elliptic', 'curves', 'from', 'this', 'together', 'with', 'the', 'riemann', 'hypothesis', 'for', 'these', 'lfunctions', 'we', 'infer', 'the', 'majorant', 'of', '2714', 'which', 'is', 'strictly', 'less', 'than', '2', 'for', 'the', 'average', 'rank', 'of', 'the', 'elliptic', 'curves', 'in', 'the', 'family', 'under', 'consideration', 'this', 'upper', 'bound', 'for', 'the', 'average', 'rank', 'enables', 'us', 'to', 'deduce', 'that', 'under', 'the', 'same', 'assumption', 'a', 'positive', 'proportion', 'of', 'elliptic', 'curves', 'have', 'algebraic', 'ranks', 'equaling', 'their', 'analytic', 'ranks', 'and', 'finite', 'tateshafarevic', 'group', 'statements', 'of', 'this', 'flavor', 'were', 'known', 'previously', 'under', 'the', 'additional', 'assumptions', 'of', 'grh', 'for', 'dirichlet', 'lfunctions', 'and', 'symmetric', 'square', 'lfunctions', 'which', 'are', 'removed', 'in', 'the', 'present', 'paper']] | [-0.18085937275840291, 0.043134396595821176, -0.16820433006445268, 0.10653598060739099, -0.07226301547428914, -0.12131608286591504, 0.050809329198994516, 0.2907380714595061, -0.21082120233793453, -0.27023496907525535, 0.12876766966354777, -0.25834271967474265, -0.08128171385233772, 0.2320175981630796, -0.09395688301723065, 0.0767320823566667, -0.0025451109495720475, 0.12323701187390192, -0.13679145845576543, -0.34747354342634307, 0.3969015165729898, -0.03383279009722173, 0.21993775045145944, 0.06704305635164552, 0.04214653989163645, 0.014547899303203127, 0.013518132731029442, -0.1051368230696896, -0.1509304137377732, 0.20688207583212903, 0.26369325364618723, 0.03897571531606132, 0.2331158885057887, -0.3774636091889235, -0.16724538430571556, 0.2110665750735969, 0.1018484541945609, 0.018420472526360816, 0.007527913168375782, -0.23161209602679672, 0.127806972383104, -0.14992947669314413, -0.21834516900206177, -0.05404777611517508, 0.016073323589556945, 0.059303521099379926, -0.3099115288511304, 0.08023419022431662, 0.0974661220218344, 0.16496530590465508, -0.12112068783507907, -0.22698331755036005, 0.01970800759415303, 0.04199914508178059, 0.13155218972704083, -0.009730670549946934, 0.04215033797964711, -0.09493678260658836, -0.04897240806242515, 0.30499736314683606, -0.03465559700333838, -0.20941327935373732, 0.08671303944469526, -0.17406974087372937, -0.19304590109848127, 0.12363449992925121, 0.1575861602724562, 0.1380053202642714, -0.07677292390244789, 0.11295697604735574, -0.17987904356539666, 0.13144058819583232, 0.13748062547729833, -0.034679433375051055, 0.1508499943362228, -0.010386879025990593, 0.11170104799334538, 0.14964402582123074, -0.04313269343552308, -0.05922027328453059, -0.3505225430467519, -0.19587537762959856, -0.13007410442263917, 0.12407238591173343, -0.11021210323865646, -0.1876763408483761, 0.4225915762403145, 0.10371649022422859, 0.16755460173790826, 0.19956620115634247, 0.1963707520225053, 0.13828138884253285, 0.040982185375218375, 0.09132337882103206, 0.16444035770435786, 0.18490302994604432, -0.02144583731745209, -0.14889603068827298, 0.07580146698104538, 0.13993093911116813] |
708.2988 | The in-flight spectroscopic performance of the Swift XRT CCD camera
during 2006-2007 | The Swift X-ray Telescope focal plane camera is a front-illuminated MOS CCD,
providing a spectral response kernel of 135 eV FWHM at 5.9 keV as measured
before launch. We describe the CCD calibration program based on celestial and
on-board calibration sources, relevant in-flight experiences, and developments
in the CCD response model. We illustrate how the revised response model
describes the calibration sources well. Comparison of observed spectra with
models folded through the instrument response produces negative residuals
around and below the Oxygen edge. We discuss several possible causes for such
residuals. Traps created by proton damage on the CCD increase the charge
transfer inefficiency (CTI) over time. We describe the evolution of the CTI
since the launch and its effect on the CCD spectral resolution and the gain.
| astro-ph | the swift xray telescope focal plane camera is a frontilluminated mos ccd providing a spectral response kernel of 135 ev fwhm at 59 kev as measured before launch we describe the ccd calibration program based on celestial and onboard calibration sources relevant inflight experiences and developments in the ccd response model we illustrate how the revised response model describes the calibration sources well comparison of observed spectra with models folded through the instrument response produces negative residuals around and below the oxygen edge we discuss several possible causes for such residuals traps created by proton damage on the ccd increase the charge transfer inefficiency cti over time we describe the evolution of the cti since the launch and its effect on the ccd spectral resolution and the gain | [['the', 'swift', 'xray', 'telescope', 'focal', 'plane', 'camera', 'is', 'a', 'frontilluminated', 'mos', 'ccd', 'providing', 'a', 'spectral', 'response', 'kernel', 'of', '135', 'ev', 'fwhm', 'at', '59', 'kev', 'as', 'measured', 'before', 'launch', 'we', 'describe', 'the', 'ccd', 'calibration', 'program', 'based', 'on', 'celestial', 'and', 'onboard', 'calibration', 'sources', 'relevant', 'inflight', 'experiences', 'and', 'developments', 'in', 'the', 'ccd', 'response', 'model', 'we', 'illustrate', 'how', 'the', 'revised', 'response', 'model', 'describes', 'the', 'calibration', 'sources', 'well', 'comparison', 'of', 'observed', 'spectra', 'with', 'models', 'folded', 'through', 'the', 'instrument', 'response', 'produces', 'negative', 'residuals', 'around', 'and', 'below', 'the', 'oxygen', 'edge', 'we', 'discuss', 'several', 'possible', 'causes', 'for', 'such', 'residuals', 'traps', 'created', 'by', 'proton', 'damage', 'on', 'the', 'ccd', 'increase', 'the', 'charge', 'transfer', 'inefficiency', 'cti', 'over', 'time', 'we', 'describe', 'the', 'evolution', 'of', 'the', 'cti', 'since', 'the', 'launch', 'and', 'its', 'effect', 'on', 'the', 'ccd', 'spectral', 'resolution', 'and', 'the', 'gain']] | [-0.04920212397883006, 0.09133059710802627, -0.061182490335340844, 0.05697255514405697, -0.04518776618351694, -0.11119891769840251, 0.054091630821858416, 0.4550010101229418, -0.195716569049182, -0.40376444306457415, 0.10257917851686216, -0.36446959667955525, -0.07946635481494013, 0.2273394749936415, -0.0997047404434852, 0.03461489424762476, 0.10720512170519214, -0.08308668438985478, -0.07438766674067665, -0.2160726982365304, 0.20695862787397346, 0.17881501572264824, 0.2472374921580922, 0.012540579889900982, 0.14134662239939644, 0.06701817717339509, -0.10141301642215694, -0.006006474985042587, -0.11141120185698128, 0.023687420063652098, 0.21153426051151314, 0.09124328767711631, 0.20482529485889245, -0.4003285210346803, -0.1800425379697117, 0.02563030630699359, 0.061824286090995884, -0.008108923169857007, -0.04544657132191787, -0.25506996249896474, -0.010423859485854337, -0.17482191999079078, -0.14126281998323975, -0.0017361769423587248, 0.0007087454359862022, 0.06484058815931348, -0.17160745194996707, 0.022545332731624512, -0.027808709345663374, 0.08898371691611828, -0.16334950062537246, -0.12504752319000545, -0.0052889052267346415, 0.0927844691232167, -0.02417097758370801, 0.03911334931217425, 0.1841159164760029, -0.10095818185391181, -0.04658239570562728, 0.3429112596786581, -0.06304635159904137, -0.042755799790029414, 0.09180173637219013, -0.18104062115526176, -0.057388844652450643, 0.19084964379726443, 0.1735718837226159, 0.06852009417889349, -0.1733185049633903, 0.03815173491443602, 0.07763689594867174, 0.24980457470701367, 0.08328895031809225, 0.0667787546517502, 0.25816686273719824, 0.17861080283182673, 0.0355706558257225, 0.13612592669142032, -0.3076291910070097, -0.006647909387993423, -0.3010355498845456, -0.09055189607897773, -0.1296534508555851, 0.05868580950118485, -0.04869418380201296, -0.13447376933163468, 0.4557455686626781, 0.17882602861755004, 0.13550607213801413, -0.010746389774794807, 0.35193407272163313, 0.089340559977245, 0.07925051822894602, 0.0277770919019531, 0.29127583930858236, 0.09298500843760849, 0.16631227631569345, -0.25123499252003967, 0.05626745723930071, -0.0025715593874338083] |
708.2989 | Fast optimal CMB power spectrum estimation with Hamiltonian sampling | We present a method for fast optimal estimation of the temperature angular
power spectrum from observations of the cosmic microwave background. We employ
a Hamiltonian Monte Carlo (HMC) sampler to obtain samples from the posterior
probability distribution of all the power spectrum coefficients given a set of
observations. We compare the properties of the HMC and the related Gibbs
sampling approach on low-resolution simulations and find that the HMC method
performs favourably even in the regime of relatively low signal-to-noise. We
also demonstrate the method on high-resolution data by applying it to simulated
WMAP data. Analysis of a WMAP-sized data set is possible in a around eighty
hours on a high-end desktop computer. HMC imposes few conditions on the
distribution to be sampled and provides us with an extremely flexible approach
upon which to build.
| astro-ph | we present a method for fast optimal estimation of the temperature angular power spectrum from observations of the cosmic microwave background we employ a hamiltonian monte carlo hmc sampler to obtain samples from the posterior probability distribution of all the power spectrum coefficients given a set of observations we compare the properties of the hmc and the related gibbs sampling approach on lowresolution simulations and find that the hmc method performs favourably even in the regime of relatively low signaltonoise we also demonstrate the method on highresolution data by applying it to simulated wmap data analysis of a wmapsized data set is possible in a around eighty hours on a highend desktop computer hmc imposes few conditions on the distribution to be sampled and provides us with an extremely flexible approach upon which to build | [['we', 'present', 'a', 'method', 'for', 'fast', 'optimal', 'estimation', 'of', 'the', 'temperature', 'angular', 'power', 'spectrum', 'from', 'observations', 'of', 'the', 'cosmic', 'microwave', 'background', 'we', 'employ', 'a', 'hamiltonian', 'monte', 'carlo', 'hmc', 'sampler', 'to', 'obtain', 'samples', 'from', 'the', 'posterior', 'probability', 'distribution', 'of', 'all', 'the', 'power', 'spectrum', 'coefficients', 'given', 'a', 'set', 'of', 'observations', 'we', 'compare', 'the', 'properties', 'of', 'the', 'hmc', 'and', 'the', 'related', 'gibbs', 'sampling', 'approach', 'on', 'lowresolution', 'simulations', 'and', 'find', 'that', 'the', 'hmc', 'method', 'performs', 'favourably', 'even', 'in', 'the', 'regime', 'of', 'relatively', 'low', 'signaltonoise', 'we', 'also', 'demonstrate', 'the', 'method', 'on', 'highresolution', 'data', 'by', 'applying', 'it', 'to', 'simulated', 'wmap', 'data', 'analysis', 'of', 'a', 'wmapsized', 'data', 'set', 'is', 'possible', 'in', 'a', 'around', 'eighty', 'hours', 'on', 'a', 'highend', 'desktop', 'computer', 'hmc', 'imposes', 'few', 'conditions', 'on', 'the', 'distribution', 'to', 'be', 'sampled', 'and', 'provides', 'us', 'with', 'an', 'extremely', 'flexible', 'approach', 'upon', 'which', 'to', 'build']] | [-0.055276584748957136, 0.042092221765713804, -0.14097600760730677, 0.055951694078715655, -0.06683846055391009, -0.09849662832053963, 0.08810887722569559, 0.4360641409823699, -0.23225795750770328, -0.37413078896117524, 0.11157881688681055, -0.27440467096670573, -0.07085364145824491, 0.2693402696515559, -0.025031963630871318, 0.06387248681771304, 0.12503896369564055, -0.011700888174766702, -0.07593601681300745, -0.22574285277228023, 0.24735122563234016, 0.15378514187994288, 0.2952026616809751, -0.04578689614366462, 0.15037204039112817, -0.03665540364584816, -0.05342212656804764, -0.011998441640232036, -0.13362495855059267, 0.1111098910706229, 0.18588484487315612, 0.159529582625116, 0.2376352348712398, -0.38535965555138996, -0.2019236696425325, 0.08451902313303869, 0.10864835251261716, 0.11465411153952104, -0.04198569154241748, -0.2543143132638965, 0.07254190579640554, -0.17130924245592818, -0.11341836908832192, -0.1317603497960563, -0.08656292127917951, 0.011460843475174103, -0.29322641216385276, 0.08429467106223239, -0.025966774713970832, 0.05056660883684656, -0.034214400825327014, -0.1106427947524935, 0.017232068470303914, 0.07164191083596852, 0.017692869596023446, 0.028579649970686034, 0.12649704299436243, -0.09992153588821416, -0.07233768280286258, 0.35795264985801567, -0.08013038354779858, -0.1710900709227617, 0.19483132045994053, -0.15027195573506405, -0.18420758866357492, 0.15101124471706798, 0.18264229490713618, 0.15245660354466692, -0.1444064187261262, 0.09010445149402559, -0.022715320936647423, 0.19677598929421894, 0.005442856800561743, -0.022145140460873052, 0.18189939559757043, 0.17712394936955464, 0.08703713314677242, 0.1556036091859647, -0.19958877280257198, -0.10055771021479949, -0.2230200219496306, -0.09535796477445471, -0.26835817812486734, 0.04778292741880182, -0.13196844190548943, -0.16869750397224256, 0.3999204280397007, 0.25187204113063305, 0.22859595581861353, 0.10477013479476906, 0.3592095563827611, 0.08217106170716883, 0.04583877750408294, 0.09246083785460066, 0.16021003961257302, 0.1182118575175557, 0.10237059737347178, -0.19920220831409097, 0.00894831190817058, -0.002823479361519384] |
708.299 | Quantum gravity and charge renormalization | We study the question of the gauge dependence of the quantum gravity
contribution to the running gauge coupling constant for electromagnetism. The
calculations are performed using dimensional regularization in a manifestly
gauge invariant and gauge condition independent formulation of the effective
action. It is shown that there is no quantum gravity contribution to the
running charge, and hence there is no alteration to asymptotic freedom at high
energies as predicted by Robinson and Wilczek.
| hep-th | we study the question of the gauge dependence of the quantum gravity contribution to the running gauge coupling constant for electromagnetism the calculations are performed using dimensional regularization in a manifestly gauge invariant and gauge condition independent formulation of the effective action it is shown that there is no quantum gravity contribution to the running charge and hence there is no alteration to asymptotic freedom at high energies as predicted by robinson and wilczek | [['we', 'study', 'the', 'question', 'of', 'the', 'gauge', 'dependence', 'of', 'the', 'quantum', 'gravity', 'contribution', 'to', 'the', 'running', 'gauge', 'coupling', 'constant', 'for', 'electromagnetism', 'the', 'calculations', 'are', 'performed', 'using', 'dimensional', 'regularization', 'in', 'a', 'manifestly', 'gauge', 'invariant', 'and', 'gauge', 'condition', 'independent', 'formulation', 'of', 'the', 'effective', 'action', 'it', 'is', 'shown', 'that', 'there', 'is', 'no', 'quantum', 'gravity', 'contribution', 'to', 'the', 'running', 'charge', 'and', 'hence', 'there', 'is', 'no', 'alteration', 'to', 'asymptotic', 'freedom', 'at', 'high', 'energies', 'as', 'predicted', 'by', 'robinson', 'and', 'wilczek']] | [-0.15956862295845625, 0.20553324778086027, -0.1160257778168228, 0.09234418363681667, -0.07712397110220548, -0.16004987280639643, 0.005772524554206914, 0.32633746657017115, -0.16995179715465653, -0.33601126059688424, 0.03197459825408972, -0.27186656725668423, -0.1552633276662311, 0.09939489495072111, -0.018041996801322378, 0.04432539884126871, -0.0032694174820003478, 0.054388731290158386, -0.06848514900303672, -0.2522074597686328, 0.2946722857446435, 0.09606365226775508, 0.26273850444704294, 0.13145673383857953, 0.16483198959581755, 0.0032839721849037182, -0.02535980851767031, 0.02261124868449327, -0.10917963238318555, 0.04920055045167337, 0.21749681203210777, 0.03263849787470315, 0.2056353331505749, -0.3735823908669723, -0.21052098972722888, 0.075044340340773, 0.08554213634390082, 0.1552105934636013, -0.06676623541777706, -0.2557666298580935, 0.07264608308370854, -0.13995973448696974, -0.12034110777627526, -0.10392538265551667, 0.036536344327032566, -0.17898806159674013, -0.2711703919524774, 0.05894886931786754, 0.021284966125480226, 0.06841927199422719, -0.033885325122674975, -0.07433165681573588, -0.03410420223844011, 0.0687826981679914, 0.17106577810969809, 0.10438004994097896, 0.13582285725813661, -0.1538323325690431, -0.11759500713339327, 0.4194935208589241, -0.12238106856475005, -0.26342585921992323, 0.1876462352952945, -0.1171848269594783, -0.15707687415635666, 0.09749747569219687, 0.07146706852457814, 0.10804262138097673, -0.1263035973282279, 0.20910356154530058, 0.0002877798208312408, 0.13353420032276395, 0.09165412100107484, 0.06551794497912901, 0.19168359953658404, 0.06138107399582057, 0.050738738937857186, 0.08749852689436159, 0.03381988270258581, -0.1270493980673318, -0.3817101146119672, -0.13370362722088355, -0.1933388989167036, 0.09506996264807074, -0.11240902744375982, -0.14093326710005655, 0.35769601677217194, 0.14955927764546956, 0.11027021040963764, 0.04018220062543814, 0.2404308517249553, 0.1571072110169995, 0.09830781899870851, 0.07666733968575057, 0.2972611897480297, 0.1934289007000877, 0.057844747808082284, -0.30487483692028233, -0.049102432314759574, 0.12481261498445796] |
708.2991 | Shape resonances in modified effective range theory for
electron-molecule collisions | We develop a simple model of shape resonances in electron-molecule collisions
that is based on the modified effective-range expansion and analytical
solutions of the Schrodinger equation for the long-range part of the
interaction potential. We apply our model to electron scattering on N$_2$ and
CO$_2$. The parameters of the effective-range expansion (i.e. the scattering
length and the effective range) are determined from experimental, integral
elastic cross sections in the 0.1 - 1.0 eV energy range. For both molecular
targets our treatment predicts shape resonances that appear slightly higher
than experimentally known resonances in total cross sections. Agreement with
the experiment can be improved by assuming the position of the resonance in a
given partial wave. Influence of quadrupole potential on resonances is also
discussed: it can be disregarded for N$_2$ but gets significant for CO$_2$. In
conclusion, our model developed within the effective range formalism reproduces
well both the very low-energy behavior of the integral cross section as well as
the presence of resonances in the few eV range.
| physics.atom-ph | we develop a simple model of shape resonances in electronmolecule collisions that is based on the modified effectiverange expansion and analytical solutions of the schrodinger equation for the longrange part of the interaction potential we apply our model to electron scattering on n_2 and co_2 the parameters of the effectiverange expansion ie the scattering length and the effective range are determined from experimental integral elastic cross sections in the 01 10 ev energy range for both molecular targets our treatment predicts shape resonances that appear slightly higher than experimentally known resonances in total cross sections agreement with the experiment can be improved by assuming the position of the resonance in a given partial wave influence of quadrupole potential on resonances is also discussed it can be disregarded for n_2 but gets significant for co_2 in conclusion our model developed within the effective range formalism reproduces well both the very lowenergy behavior of the integral cross section as well as the presence of resonances in the few ev range | [['we', 'develop', 'a', 'simple', 'model', 'of', 'shape', 'resonances', 'in', 'electronmolecule', 'collisions', 'that', 'is', 'based', 'on', 'the', 'modified', 'effectiverange', 'expansion', 'and', 'analytical', 'solutions', 'of', 'the', 'schrodinger', 'equation', 'for', 'the', 'longrange', 'part', 'of', 'the', 'interaction', 'potential', 'we', 'apply', 'our', 'model', 'to', 'electron', 'scattering', 'on', 'n_2', 'and', 'co_2', 'the', 'parameters', 'of', 'the', 'effectiverange', 'expansion', 'ie', 'the', 'scattering', 'length', 'and', 'the', 'effective', 'range', 'are', 'determined', 'from', 'experimental', 'integral', 'elastic', 'cross', 'sections', 'in', 'the', '01', '10', 'ev', 'energy', 'range', 'for', 'both', 'molecular', 'targets', 'our', 'treatment', 'predicts', 'shape', 'resonances', 'that', 'appear', 'slightly', 'higher', 'than', 'experimentally', 'known', 'resonances', 'in', 'total', 'cross', 'sections', 'agreement', 'with', 'the', 'experiment', 'can', 'be', 'improved', 'by', 'assuming', 'the', 'position', 'of', 'the', 'resonance', 'in', 'a', 'given', 'partial', 'wave', 'influence', 'of', 'quadrupole', 'potential', 'on', 'resonances', 'is', 'also', 'discussed', 'it', 'can', 'be', 'disregarded', 'for', 'n_2', 'but', 'gets', 'significant', 'for', 'co_2', 'in', 'conclusion', 'our', 'model', 'developed', 'within', 'the', 'effective', 'range', 'formalism', 'reproduces', 'well', 'both', 'the', 'very', 'lowenergy', 'behavior', 'of', 'the', 'integral', 'cross', 'section', 'as', 'well', 'as', 'the', 'presence', 'of', 'resonances', 'in', 'the', 'few', 'ev', 'range']] | [-0.07915649252875785, 0.1243419431210939, -0.050338762876067665, 0.10294272695873155, -0.006452956785713988, -0.07665701833043602, 0.002238066345896749, 0.36027156386435744, -0.20101736859760422, -0.33166478433746044, 0.014703648864746182, -0.3148610025112118, -0.10554592940302211, 0.19493035574781797, 0.05964286182383408, 0.05799507275168296, 0.05645928966363759, 0.04415660229833087, -0.0186249228676648, -0.17291351431603766, 0.28514753349701916, 0.07637870534589249, 0.20381133157172285, 0.16392869138369515, 0.050733369116815516, 0.0635657900503637, 0.042815860628338885, -0.023022445029623452, -0.1511356437491659, 0.09673668646930655, 0.2458143344961822, 0.021548953084718613, 0.1502159050072632, -0.41417572689464405, -0.21795775199730305, 0.038234421393662205, 0.17839749557398527, 0.11946158804598131, -0.04132224992957033, -0.269893895396741, 0.02564950163752569, -0.19173903362492897, -0.1586693311969395, -0.07635637299141049, 0.03643917341971593, 0.027919286260536563, -0.2932081862153219, 0.1278935532285513, -0.00043648940932360434, 0.02848093136951017, -0.12317721163604542, -0.18547746781925006, -0.011081443578448324, 0.054783001597527234, 0.03766635261611858, -0.0013831528319445039, 0.1623251936232139, -0.11752179144241381, -0.051163413162742345, 0.40951578975433395, -0.12629271122126998, -0.1875283893042208, 0.13433925585593984, -0.1736973520684322, -0.05364668150182946, 0.19198816922670675, 0.16175718593374422, 0.11995881151579808, -0.13563652470475063, 0.08649291758809427, -0.008145293211089751, 0.1737222581591812, 0.09024790060080011, 0.01745229323599536, 0.16963211741815376, 0.16506885166191274, 0.000671982346656954, 0.05849946098585081, -0.11837366362141481, -0.10586907851254745, -0.3259319892330539, -0.088840842282891, -0.14668963539380847, 0.011776769592220912, -0.06522982579112327, -0.11890940832589487, 0.382202926894284, 0.1296418110917633, 0.24582047294825315, 0.026601754977101728, 0.2846928691890623, 0.17062138452629802, 0.07502896692936442, 0.0006083504385536625, 0.3196043887319753, 0.14127015777506, 0.08119870816950597, -0.2376512796715057, 0.05638110307786735, 0.013387645088923386] |
708.2992 | Quantum private queries | We propose a cheat sensitive quantum protocol to perform a private search on
a classical database which is efficient in terms of communication complexity.
It allows a user to retrieve an item from the server in possession of the
database without revealing which item she retrieved: if the server tries to
obtain information on the query, the person querying the database can find it
out. Furthermore our protocol ensures perfect data privacy of the database,
i.e. the information that the user can retrieve in a single queries is bounded
and does not depend on the size of the database. With respect to the known
(quantum and classical) strategies for private information retrieval, our
protocol displays an exponential reduction both in communication complexity and
in running-time computational complexity.
| quant-ph | we propose a cheat sensitive quantum protocol to perform a private search on a classical database which is efficient in terms of communication complexity it allows a user to retrieve an item from the server in possession of the database without revealing which item she retrieved if the server tries to obtain information on the query the person querying the database can find it out furthermore our protocol ensures perfect data privacy of the database ie the information that the user can retrieve in a single queries is bounded and does not depend on the size of the database with respect to the known quantum and classical strategies for private information retrieval our protocol displays an exponential reduction both in communication complexity and in runningtime computational complexity | [['we', 'propose', 'a', 'cheat', 'sensitive', 'quantum', 'protocol', 'to', 'perform', 'a', 'private', 'search', 'on', 'a', 'classical', 'database', 'which', 'is', 'efficient', 'in', 'terms', 'of', 'communication', 'complexity', 'it', 'allows', 'a', 'user', 'to', 'retrieve', 'an', 'item', 'from', 'the', 'server', 'in', 'possession', 'of', 'the', 'database', 'without', 'revealing', 'which', 'item', 'she', 'retrieved', 'if', 'the', 'server', 'tries', 'to', 'obtain', 'information', 'on', 'the', 'query', 'the', 'person', 'querying', 'the', 'database', 'can', 'find', 'it', 'out', 'furthermore', 'our', 'protocol', 'ensures', 'perfect', 'data', 'privacy', 'of', 'the', 'database', 'ie', 'the', 'information', 'that', 'the', 'user', 'can', 'retrieve', 'in', 'a', 'single', 'queries', 'is', 'bounded', 'and', 'does', 'not', 'depend', 'on', 'the', 'size', 'of', 'the', 'database', 'with', 'respect', 'to', 'the', 'known', 'quantum', 'and', 'classical', 'strategies', 'for', 'private', 'information', 'retrieval', 'our', 'protocol', 'displays', 'an', 'exponential', 'reduction', 'both', 'in', 'communication', 'complexity', 'and', 'in', 'runningtime', 'computational', 'complexity']] | [-0.12051649874178913, -0.019149113415078606, -0.10061283251747313, 0.05236318475185475, -0.12220056814519234, -0.23422819881619314, 0.17364713497364556, 0.33991731627015614, -0.3184091089601357, -0.35599120323386735, 0.0855587825436795, -0.32351034408351353, -0.07768935690575286, 0.18424470459228368, -0.16267073171957594, 0.0626618138067131, 0.0398613609388236, 0.15222245374122473, -0.009577330970022035, -0.3411018651539797, 0.2661887557102793, 0.054573718515246755, 0.305662622301304, 0.03465763906999601, 0.06462240866000404, 0.05377472227981945, -0.06587742935814785, -0.0278981769064214, -0.10326130194874805, 0.11612721262719687, 0.30304720013688397, 0.2472774997595551, 0.27835271812564744, -0.39746385522362754, -0.12667891390870992, 0.08374256872678337, 0.13098270811991194, 0.15164182915014957, -0.05578472418802255, -0.29949558261730597, 0.08424157830409881, -0.14707109831478887, 0.004388823144607187, -0.09465021674161939, -0.01754803066398567, -0.024003362508608014, -0.3197255042660248, -0.020656985674405427, 0.03907568848097888, 0.033042045409138514, -0.003396612288170003, -0.002573936871494951, 0.0019604361187079995, 0.19645656375251125, -0.032778105968022796, 0.040627517900612996, 0.15149679215712927, -0.14820510962259348, -0.1707079243891154, 0.4143804956198208, -0.028753919811098008, -0.1925728555116069, 0.12768318826208022, -0.0759664535170465, -0.11692348122963403, 0.12396479455211501, 0.17877812623449668, 0.08438476454833244, -0.149710533619807, 0.08536899042742943, -0.09182436194446847, 0.2993344667506969, 0.042353535520635165, 0.09407734080753107, 0.13311542925520206, 0.14376542276490156, 0.10463226021278474, 0.16125873600932086, -0.07176038995935163, -0.137445309470723, -0.21864449506896863, -0.1921967923747537, -0.2436284453087435, 0.013553343084572051, -0.12949533008121955, -0.17404456729964007, 0.36235337280924984, 0.19922194594983011, 0.14479144599186036, 0.08066049842053921, 0.36499666956466015, 0.026881871292162247, 0.09458740600421438, 0.1727119785520742, 0.14585124275199776, -0.024291463379608833, 0.17133308356026494, -0.20327557874000154, 0.19533923224685348, -0.003340327413408929] |
708.2993 | Quantum-like Description of Probabilistic Data from Shafir-Tversky
Experiments: evidence of trigonometric and hyperbolic (!) interference | In this paper we present quantum-like (QL) representation of the
Shafir-Tversky statistical effect. We apply so called contextual approach. The
Shafir-Tversky effect is considered as a consequence of combination of a number
of incompatible contexts which are involved e.g. in Prisoner's Dilemma or in
more general games inducing the disjunction effect. As a consequence, the law
of total probability is violated for experimental data obtained by Shafir and
Tversky (1992) as well as Tversky and Shafir (1992). Moreover, we can find a
numerical measure of contextual incompatibility (so called coefficient of
interference) as well as represent contexts which are involved in Prisoner's
Dilemma (PD) by probability amplitudes -- normalized vectors (``mental wave
functions''). We remark that statistical data from Shafir and Tversky (1992)
and Tversky and Shafir (1992) experiments differ crucially from the point of
view of mental interference. The second one exhibits the conventional
trigonometric ($\cos$-type) interference, but the first one exhibits so called
hyperbolic ($\cosh$-type) interference. We discuss QL processing of information
by cognitive systems, in particular, QL decision making as well as classical
and QL rationality.
| physics.gen-ph | in this paper we present quantumlike ql representation of the shafirtversky statistical effect we apply so called contextual approach the shafirtversky effect is considered as a consequence of combination of a number of incompatible contexts which are involved eg in prisoners dilemma or in more general games inducing the disjunction effect as a consequence the law of total probability is violated for experimental data obtained by shafir and tversky 1992 as well as tversky and shafir 1992 moreover we can find a numerical measure of contextual incompatibility so called coefficient of interference as well as represent contexts which are involved in prisoners dilemma pd by probability amplitudes normalized vectors mental wave functions we remark that statistical data from shafir and tversky 1992 and tversky and shafir 1992 experiments differ crucially from the point of view of mental interference the second one exhibits the conventional trigonometric costype interference but the first one exhibits so called hyperbolic coshtype interference we discuss ql processing of information by cognitive systems in particular ql decision making as well as classical and ql rationality | [['in', 'this', 'paper', 'we', 'present', 'quantumlike', 'ql', 'representation', 'of', 'the', 'shafirtversky', 'statistical', 'effect', 'we', 'apply', 'so', 'called', 'contextual', 'approach', 'the', 'shafirtversky', 'effect', 'is', 'considered', 'as', 'a', 'consequence', 'of', 'combination', 'of', 'a', 'number', 'of', 'incompatible', 'contexts', 'which', 'are', 'involved', 'eg', 'in', 'prisoners', 'dilemma', 'or', 'in', 'more', 'general', 'games', 'inducing', 'the', 'disjunction', 'effect', 'as', 'a', 'consequence', 'the', 'law', 'of', 'total', 'probability', 'is', 'violated', 'for', 'experimental', 'data', 'obtained', 'by', 'shafir', 'and', 'tversky', '1992', 'as', 'well', 'as', 'tversky', 'and', 'shafir', '1992', 'moreover', 'we', 'can', 'find', 'a', 'numerical', 'measure', 'of', 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0.1103774823195168, -0.16074867279800986, 0.11226572995872369, 0.028482726759144237] |
708.2994 | Surface electric potential dynamic on graphite | We observe variations on the surface potential of graphite samples that we
attribute to the adsorption physisorption of tetracene isomers.
| cond-mat.mtrl-sci | we observe variations on the surface potential of graphite samples that we attribute to the adsorption physisorption of tetracene isomers | [['we', 'observe', 'variations', 'on', 'the', 'surface', 'potential', 'of', 'graphite', 'samples', 'that', 'we', 'attribute', 'to', 'the', 'adsorption', 'physisorption', 'of', 'tetracene', 'isomers']] | [-0.05729361418634653, 0.07956918841227889, -0.09327916130423546, 0.027450141590088607, 0.06184369260445237, -0.08726393850520253, 0.15256910879397764, 0.540305270254612, -0.24183782786130906, -0.2803830146789551, -0.09141344171948732, -0.34861104637384416, -0.15640957280993462, 0.07789633511565626, -0.018711318867281078, -0.06119341384619474, 0.052828889433294536, -0.10101423673331737, -0.04688941714121029, -0.24194339495152234, 0.2886219460517168, 0.042912325076758864, 0.29192825704813, 0.2121666394174099, 0.01653288472443819, -0.07247640346176923, 0.14204912036657333, -0.00264833839610219, -0.22678882611398876, 0.19082863107323647, 0.21406647944822907, -0.11462049197871238, 0.11490735867992044, -0.4955325469374657, -0.2352994441986084, 0.05203153286129236, 0.03863652292639017, 0.19760992750525475, -0.06731407957267947, -0.21245111655443907, 0.04618836771696806, -0.06261514667421579, -0.025076670502312482, -0.09505207592155784, 0.07417887523770332, 0.047810987336561084, -0.17094116291264072, 0.08735904707573354, -0.0054803815670311454, 0.09566529272124172, -0.22310244385153055, -0.2049844795372337, -0.14580917754210532, 0.04008367136120796, 0.10337726976722479, -0.06203062669374049, 0.3314200934488326, -0.06288954159826972, -0.05477870858740062, 0.44697769097983836, -0.12159006264992059, -0.050749107357114555, 0.25359614156186583, -0.16969398690853268, -0.16871860735118388, 0.18559054024517535, 0.1244273291900754, 0.15775431767106057, -0.06845322581939399, 0.014649214502424002, -0.002868606150150299, 0.224106502532959, 0.1382804920896888, -0.011689612618647515, 0.16453232504427434, 0.20529227051883936, 0.05893067042343318, 0.1735907604917884, -0.26265596350422127, 0.001119435066357255, -0.18869361691176892, -0.2419563239440322, -0.1821686000097543, 0.06317885043099522, -0.01328499405644834, -0.24173752409406007, 0.403941601049155, 0.1169624556787312, 0.1993913620710373, -0.019008263666182756, 0.15417585643008352, -0.02401841413229704, 0.08124595731496811, -0.09051052769646048, 0.226161477714777, 0.11816091565415263, -0.00960667950566858, -0.3102516828104854, 0.15912472998024896, -0.02471573301590979] |
708.2995 | On the conjecture of Kevin Walker | In 1985 Kevin Walker in his study of topology of polygon spaces raised an
interesting conjecture in the spirit of the well-known question "Can you hear
the shape of a drum?" of Marc Kac. Roughly, Walker's conjecture asks if one can
recover relative lengths of the bars of a linkage from intrinsic algebraic
properties of the cohomology algebra of its configuration space. In this paper
we prove that the conjecture is true for polygon spaces in R^3. We also prove
that for planar polygon spaces the conjecture holds is several modified forms:
(a) if one takes into account the action of a natural involution on cohomology,
(b) if the cohomology algebra of the involution's orbit space is known, or (c)
if the length vector is normal. Some of our results allow the length vector to
be non-generic, the corresponding polygon spaces have singularities. Our main
tool is the study of the natural involution and its action on cohomology. A
crucial role in our proof plays the solution of the isomorphism problem for
monoidal rings due to J. Gubeladze.
| math.AT math.GT | in 1985 kevin walker in his study of topology of polygon spaces raised an interesting conjecture in the spirit of the wellknown question can you hear the shape of a drum of marc kac roughly walkers conjecture asks if one can recover relative lengths of the bars of a linkage from intrinsic algebraic properties of the cohomology algebra of its configuration space in this paper we prove that the conjecture is true for polygon spaces in r3 we also prove that for planar polygon spaces the conjecture holds is several modified forms a if one takes into account the action of a natural involution on cohomology b if the cohomology algebra of the involutions orbit space is known or c if the length vector is normal some of our results allow the length vector to be nongeneric the corresponding polygon spaces have singularities our main tool is the study of the natural involution and its action on cohomology a crucial role in our proof plays the solution of the isomorphism problem for monoidal rings due to j gubeladze | [['in', '1985', 'kevin', 'walker', 'in', 'his', 'study', 'of', 'topology', 'of', 'polygon', 'spaces', 'raised', 'an', 'interesting', 'conjecture', 'in', 'the', 'spirit', 'of', 'the', 'wellknown', 'question', 'can', 'you', 'hear', 'the', 'shape', 'of', 'a', 'drum', 'of', 'marc', 'kac', 'roughly', 'walkers', 'conjecture', 'asks', 'if', 'one', 'can', 'recover', 'relative', 'lengths', 'of', 'the', 'bars', 'of', 'a', 'linkage', 'from', 'intrinsic', 'algebraic', 'properties', 'of', 'the', 'cohomology', 'algebra', 'of', 'its', 'configuration', 'space', 'in', 'this', 'paper', 'we', 'prove', 'that', 'the', 'conjecture', 'is', 'true', 'for', 'polygon', 'spaces', 'in', 'r3', 'we', 'also', 'prove', 'that', 'for', 'planar', 'polygon', 'spaces', 'the', 'conjecture', 'holds', 'is', 'several', 'modified', 'forms', 'a', 'if', 'one', 'takes', 'into', 'account', 'the', 'action', 'of', 'a', 'natural', 'involution', 'on', 'cohomology', 'b', 'if', 'the', 'cohomology', 'algebra', 'of', 'the', 'involutions', 'orbit', 'space', 'is', 'known', 'or', 'c', 'if', 'the', 'length', 'vector', 'is', 'normal', 'some', 'of', 'our', 'results', 'allow', 'the', 'length', 'vector', 'to', 'be', 'nongeneric', 'the', 'corresponding', 'polygon', 'spaces', 'have', 'singularities', 'our', 'main', 'tool', 'is', 'the', 'study', 'of', 'the', 'natural', 'involution', 'and', 'its', 'action', 'on', 'cohomology', 'a', 'crucial', 'role', 'in', 'our', 'proof', 'plays', 'the', 'solution', 'of', 'the', 'isomorphism', 'problem', 'for', 'monoidal', 'rings', 'due', 'to', 'j', 'gubeladze']] | [-0.17463906260018938, 0.06724570850389447, -0.11960715772531759, 0.08312051285782912, -0.10397520714983595, -0.1485722333459665, 0.0007476954468463161, 0.3132724039507716, -0.3307445201881523, -0.22360140622038854, 0.0932882623289178, -0.23646809140303998, -0.17239120549370607, 0.18316748037311678, -0.17991244846306156, -0.02390033659705725, 0.08625540860635594, 0.1002481674626365, -0.03615085348314239, -0.31087325338151284, 0.39048631830151415, -0.012099693092423376, 0.21744063211388473, 0.08447860226066511, 0.09960605942492447, 0.05590655476252517, 0.0024143219716177226, -0.017191010268648374, -0.15011256644046103, 0.11548435974805982, 0.24513200509853744, 0.10066985860244591, 0.23012364198704868, -0.3815723454149367, -0.11621330520452074, 0.16907992979754913, 0.12876631626126805, 0.05272040070620564, 0.004147942202804045, -0.2668571832872341, 0.10317581666507915, -0.11459447103264753, -0.19854065029243573, -0.021653600460902023, 0.11656367970013133, -0.02665033797325378, -0.22410771815044794, -0.0037510089716531357, 0.16094488771835877, 0.0715479701338859, -0.0839922603028774, -0.06500774372455381, -0.04808800944435839, 0.12376891920118059, 0.014635601629021713, 0.0857547503945763, 0.08427460490790682, -0.08333806275374392, -0.14038726232757562, 0.40844173525365884, -0.017566544005092694, -0.21494867360700717, 0.09928292093871768, -0.17347154938720502, -0.16704865689572532, 0.07792330455568651, 0.07674911421740996, 0.14767407737096794, -0.013408449949340874, 0.19095607388083133, -0.15853912241003487, 0.07718894897248554, 0.13960537917747193, -0.021345750413039762, 0.17519417549535798, 0.10023277721713099, 0.07712657791379253, 0.1457881087579848, -0.011620479520787014, -0.05982268085112021, -0.3057602259109393, -0.2212107986881492, -0.14689547175625234, 0.10167555070319997, -0.11681744635745744, -0.16159208393210986, 0.3877000841783004, 0.10705037452699093, 0.19269944342596226, 0.09325309585926406, 0.21686717878315556, 0.04846629950811752, 0.05059055380459111, 0.05927122816746908, 0.16598008205578532, 0.20166102999800375, 0.020744103755215914, -0.16121029100129694, 0.04349951494453747, 0.2144893533981855] |
708.2996 | Structure and Nuclear Composition of General Relativistic,
Magnetohydrodynamic Outflows from Neutrino-Cooled Disks | We compute the structure and degree of neutronization of general relativistic
magnetohydrodynamic (GRMHD) outflows originating from the inner region of
neutrino-cooled disks. We consider both, outflows expelled from a hydrostatic
disk corona and outflows driven by disk turbulence. We show that in outflows
driven thermally from a static disk the electron fraction quickly evolves to
its equilibrium value which is dominated by neutrino capture. Those outflows
are generally proton rich and, under certain conditions, can be magnetically
dominated. They may also provide sites for effective production of 56Ni.
Centrifugally driven outflows and outflows driven by disk turbulence, on the
other hand, can preserve the large in-disk neutron excess. Those outflows are,
quite generally, subrelativistic by virtue of the large mass flux driven by the
additional forces.
| astro-ph | we compute the structure and degree of neutronization of general relativistic magnetohydrodynamic grmhd outflows originating from the inner region of neutrinocooled disks we consider both outflows expelled from a hydrostatic disk corona and outflows driven by disk turbulence we show that in outflows driven thermally from a static disk the electron fraction quickly evolves to its equilibrium value which is dominated by neutrino capture those outflows are generally proton rich and under certain conditions can be magnetically dominated they may also provide sites for effective production of 56ni centrifugally driven outflows and outflows driven by disk turbulence on the other hand can preserve the large indisk neutron excess those outflows are quite generally subrelativistic by virtue of the large mass flux driven by the additional forces | [['we', 'compute', 'the', 'structure', 'and', 'degree', 'of', 'neutronization', 'of', 'general', 'relativistic', 'magnetohydrodynamic', 'grmhd', 'outflows', 'originating', 'from', 'the', 'inner', 'region', 'of', 'neutrinocooled', 'disks', 'we', 'consider', 'both', 'outflows', 'expelled', 'from', 'a', 'hydrostatic', 'disk', 'corona', 'and', 'outflows', 'driven', 'by', 'disk', 'turbulence', 'we', 'show', 'that', 'in', 'outflows', 'driven', 'thermally', 'from', 'a', 'static', 'disk', 'the', 'electron', 'fraction', 'quickly', 'evolves', 'to', 'its', 'equilibrium', 'value', 'which', 'is', 'dominated', 'by', 'neutrino', 'capture', 'those', 'outflows', 'are', 'generally', 'proton', 'rich', 'and', 'under', 'certain', 'conditions', 'can', 'be', 'magnetically', 'dominated', 'they', 'may', 'also', 'provide', 'sites', 'for', 'effective', 'production', 'of', '56ni', 'centrifugally', 'driven', 'outflows', 'and', 'outflows', 'driven', 'by', 'disk', 'turbulence', 'on', 'the', 'other', 'hand', 'can', 'preserve', 'the', 'large', 'indisk', 'neutron', 'excess', 'those', 'outflows', 'are', 'quite', 'generally', 'subrelativistic', 'by', 'virtue', 'of', 'the', 'large', 'mass', 'flux', 'driven', 'by', 'the', 'additional', 'forces']] | [-0.10749847261375556, 0.24600326633154754, -0.00468038768684935, 0.1554861168112857, -0.07912225930929362, -0.07904305986991698, -0.02889798880214729, 0.3999665409385685, -0.2734401876860786, -0.2929842704167915, 0.05278849151513968, -0.2681702157807729, 0.015414938600438218, 0.22885693101182816, 0.017655673593657814, -0.04683122211847351, 0.0471170495360321, -0.1573302181498129, -0.030399310664044662, -0.14822154474677518, 0.4045402594206352, 0.11760923953815586, 0.11888515094243404, -0.008060421477282597, 0.06274759688503331, -0.18214044481560232, -0.01480877030380292, 0.04007247655901001, -0.15501745991966187, 0.046932625899249354, 0.16598154535694493, 0.07448628360021209, 0.2030401118376869, -0.48348130178563886, -0.24998584151681927, 0.04389652233415594, 0.19957770070519357, 0.07218105906328659, -0.10650523113814878, -0.24284180454791537, 0.05627249784782411, -0.24592864820985438, -0.14630329139560225, -0.03229531585719318, -0.00728490131921948, 0.05796534313990306, -0.28745721873969565, 0.12897769847398785, 0.08104118399159421, 0.051626521040729824, -0.09724876018784319, -0.031198263485243335, -0.1242008518634571, 0.028637402838776038, 0.10644726553979876, 0.07719006559198043, 0.30807007771791034, -0.17861946851074223, -0.02731066452161897, 0.4094068230765443, -0.045351014607438137, -0.09061940477067043, 0.24154997358305585, -0.2550149954049774, -0.10648584617523565, 0.2462661986716003, 0.1682784575229836, 0.1304404527375785, -0.13502352480039312, -0.006261786869135759, -0.05292486519153629, 0.1371789299125325, 0.027372388183952323, 0.004591403324397222, 0.36345910521904157, 0.0744043708051784, 0.02113570225340063, 0.13198578543914852, -0.14418503514394934, -0.1086680027175813, -0.24229352302952772, -0.060111035840467564, -0.1068734252226672, 0.14329472705647942, -0.09301873059926688, -0.10560031584094441, 0.2753225357848264, 0.07404084181845454, 0.1822086038319246, -0.06021399636630945, 0.29456530860255636, 0.12234132772677445, 0.0632083889813946, 0.24399906278787448, 0.33778181781489697, 0.16441835080354755, 0.1193921524940783, -0.2539211099668007, 0.12383950852589416, 0.04414812679077306] |
708.2997 | Topology of randon linkages | Betti numbers of configuration spaces of mechanical linkages (known also as
polygon spaces) depend on a large number of parameters -- the lengths of the
bars of the linkage. Motivated by applications in topological robotics,
statistical shape theory and molecular biology, we view these lengths as random
variables and study asymptotic values of the average Betti numbers as the
number of links n tends to infinity. We establish a surprising fact that for a
reasonably ample class of sequences of probability measures the asymptotic
values of the average Betti numbers are independent of the choice of the
measure. The main results of the paper apply to planar linkages as well as for
linkages in R^3. We also prove results about higher moments of Betti numbers.
| math.AT math.PR | betti numbers of configuration spaces of mechanical linkages known also as polygon spaces depend on a large number of parameters the lengths of the bars of the linkage motivated by applications in topological robotics statistical shape theory and molecular biology we view these lengths as random variables and study asymptotic values of the average betti numbers as the number of links n tends to infinity we establish a surprising fact that for a reasonably ample class of sequences of probability measures the asymptotic values of the average betti numbers are independent of the choice of the measure the main results of the paper apply to planar linkages as well as for linkages in r3 we also prove results about higher moments of betti numbers | [['betti', 'numbers', 'of', 'configuration', 'spaces', 'of', 'mechanical', 'linkages', 'known', 'also', 'as', 'polygon', 'spaces', 'depend', 'on', 'a', 'large', 'number', 'of', 'parameters', 'the', 'lengths', 'of', 'the', 'bars', 'of', 'the', 'linkage', 'motivated', 'by', 'applications', 'in', 'topological', 'robotics', 'statistical', 'shape', 'theory', 'and', 'molecular', 'biology', 'we', 'view', 'these', 'lengths', 'as', 'random', 'variables', 'and', 'study', 'asymptotic', 'values', 'of', 'the', 'average', 'betti', 'numbers', 'as', 'the', 'number', 'of', 'links', 'n', 'tends', 'to', 'infinity', 'we', 'establish', 'a', 'surprising', 'fact', 'that', 'for', 'a', 'reasonably', 'ample', 'class', 'of', 'sequences', 'of', 'probability', 'measures', 'the', 'asymptotic', 'values', 'of', 'the', 'average', 'betti', 'numbers', 'are', 'independent', 'of', 'the', 'choice', 'of', 'the', 'measure', 'the', 'main', 'results', 'of', 'the', 'paper', 'apply', 'to', 'planar', 'linkages', 'as', 'well', 'as', 'for', 'linkages', 'in', 'r3', 'we', 'also', 'prove', 'results', 'about', 'higher', 'moments', 'of', 'betti', 'numbers']] | [-0.17731773363231051, 0.1336912764686971, -0.04554824881826437, 0.1027260938464033, -0.041817209841082656, -0.05439127528018529, 0.06856537936818635, 0.31582532294334903, -0.25664111315798493, -0.31363766893909706, 0.09178802429420513, -0.2577707696736099, -0.1839372766853851, 0.2128581335062101, -0.11672736050170515, 0.06241774548341768, 0.04113528068222466, 0.0811700948003319, -0.015086570615230518, -0.2621656586763434, 0.325887962683825, -0.0040067920776745, 0.2480065340416566, 0.04324950238749865, 0.08679997817577509, -0.003938731831318188, -0.010268332149397822, 0.06763876772076342, -0.20094354241372192, 0.15519562844494958, 0.24385885443658598, 0.10349150878538503, 0.2232140840722188, -0.40385713650574606, -0.12839937415875255, 0.14016867372406377, 0.13911227206324017, 0.0655298012744395, 0.02196116094391102, -0.21419283977499412, 0.0968409874100959, -0.12190585898520846, -0.21133132253007422, -0.07863572224666696, 0.07421351397211003, 0.13741175291661714, -0.24169791978783906, 0.024684591041859088, 0.055875084788215554, 0.12796726813089224, -0.03639135343368135, -0.18297444566551055, -0.04358771579122291, 0.1611813533104836, 0.0861119998603939, -0.019725505243836632, 0.09696118710111946, -0.14466087690849352, -0.15184998269673558, 0.3510594588794535, -0.008431306088178029, -0.21518492746737697, 0.1447639390450692, -0.17124163532899994, -0.17391872004560766, 0.09873949210610121, 0.15868689656640672, 0.1473364228863389, -0.008373538666825381, 0.08690401338577841, -0.08750683755281516, 0.12354215604042815, 0.11631571731695364, 0.0770772492190102, 0.1669637630280528, 0.10961338903589715, 0.08311366430397386, 0.16014135950395175, -0.06817370116327619, -0.11952961856150068, -0.34315453714600974, -0.20489562953627038, -0.22468568967475044, 0.08672169636702165, -0.1726387635907515, -0.20677497601436992, 0.3653902457764132, 0.10528382681865966, 0.24759608009950287, 0.15569560971832083, 0.25581560731534997, 0.03536004974457976, 0.008543788757730996, 0.014058069213323535, 0.15297427574818534, 0.21291020431653446, 0.04719245785494305, -0.1280535016839783, 0.08138890270023577, 0.11868747643705818] |
708.2998 | Relative non-relativistic mechanics | Dynamic equations of non-relativistic mechanics are written in
covariant-coordinate form in terms of relative velocities and accelerations
with respect to an arbitrary reference frame. The notions of the
non-relativistic reference frame, inertial force, free motion equation, and
inertial frame are discussed.
| math-ph gr-qc math.MP | dynamic equations of nonrelativistic mechanics are written in covariantcoordinate form in terms of relative velocities and accelerations with respect to an arbitrary reference frame the notions of the nonrelativistic reference frame inertial force free motion equation and inertial frame are discussed | [['dynamic', 'equations', 'of', 'nonrelativistic', 'mechanics', 'are', 'written', 'in', 'covariantcoordinate', 'form', 'in', 'terms', 'of', 'relative', 'velocities', 'and', 'accelerations', 'with', 'respect', 'to', 'an', 'arbitrary', 'reference', 'frame', 'the', 'notions', 'of', 'the', 'nonrelativistic', 'reference', 'frame', 'inertial', 'force', 'free', 'motion', 'equation', 'and', 'inertial', 'frame', 'are', 'discussed']] | [-0.15500057672616094, 0.18155324078725243, -0.07008422746002907, -0.004397075902670622, -0.030030329804867507, -0.09724474193062634, -0.15474639711901544, 0.3871298442129046, -0.2825318745337427, -0.28135136966157004, -0.06969095676322468, -0.22817932826001197, 0.009715818299446255, 0.1517357293283567, -0.12049386776052415, 0.10872096144594252, 0.08519343756488525, 0.1681186877656728, -0.1314327845815569, -0.11059662161860614, 0.26091597764752805, 0.0752662867307663, 0.25817046221345663, -0.10321511365473271, 0.18635715497657657, 0.0015017844969406724, -0.07624797066673636, 0.10597806905861944, -0.1350693434244022, 0.09181908341124653, 0.22203978123143314, 0.04923259895294905, 0.25020852824673057, -0.41679670475423336, -0.16033755331300198, -0.007994260475970804, 0.10027477468829601, 0.1500763947609812, 0.02523229136131704, -0.35279135424643754, -0.0192774657625705, -0.20815849550999702, -0.17083383947610856, -0.05796038645785302, 0.11394086289219559, 0.12042740378528834, -0.20126975309103728, 0.15327688148245217, 0.048052234523675, 0.0935015785973519, -0.22101418632082642, -0.04082674728706479, 0.054156596586108205, 0.10192790031433105, 0.09353749299771152, 0.06729900918435305, 0.1922524288762361, -0.0976787704974413, -0.08314941027201712, 0.5929266246035695, -0.09797165079507977, -0.37715295078232886, 0.18821383430622518, -0.11172910127788782, -0.017291911889333277, 0.09680337868630887, 0.17835852676071226, 0.10077922737691551, -0.18846223265863954, 0.09484663493640255, 0.018298851139843465, 0.06845130738802255, 0.18329367646947503, 0.07858779266243801, 0.1772395224776119, -0.002062684670090675, -0.003096048580482602, 0.030957196187227965, -0.025392346759326757, -0.19087103577330708, -0.45206506811082364, -0.19586877084802837, -0.11069100899621845, 0.0016903367824852467, -0.10006065724810469, -0.13306215731427073, 0.2796063626592513, 0.14871895683463662, 0.13630133960396051, 0.03767255283892155, 0.3069912280887365, 0.1556132161989808, -0.011880992632359266, 0.09833875613985583, 0.30444143994245676, 0.1717315322603099, 0.12344020586460829, -0.22403833884745836, -0.054042984044644984, 0.17053153120796197] |
708.2999 | On the estimation of a parameter with incomplete knowledge on a nuisance
parameter | In this paper we consider the problem of estimating a parameter of a
probability distribution when we have some prior information on a nuisance
parameter. We start by the very simple case where we know perfectly the value
of the nuisance parameter. The complete likelihood is the classical tool in
this case. Then, progressively, we consider the case where we are given a prior
probability distribution on this nuisance parameter. The marginal likelihood is
then the classical tool in this case. Then, we consider the case where we only
have a fixed number of its moments. Here, we may use the maximum entropy (ME)
principle to assign a prior law and thus go back to the previous case. Finally,
we consider the case where we know only its median. In our knowledge, there is
not any classical tool for this case. We propose then a new tool for this case
based on a recently proposed alternative distribution to the marginal
probability distribution. This new criterion is obtained by first remarking
that the marginal distribution can be considered as the mean value of the
original distribution over the prior probability law of the nuisance parameter,
and then, by using the median in place of the mean. In this paper, we first
summarize the classical tools used for the three first cases, then we give the
precise definition of this new criterion and its properties and, finally,
present a few examples to show the differences of these cases.
Key Words: Nuisance parameter, Bayesian inference, Maximum Entropy,
Marginalization, Incomplete knowledge, Mean and Median of the Likelihood over
the prior distribution
| physics.data-an | in this paper we consider the problem of estimating a parameter of a probability distribution when we have some prior information on a nuisance parameter we start by the very simple case where we know perfectly the value of the nuisance parameter the complete likelihood is the classical tool in this case then progressively we consider the case where we are given a prior probability distribution on this nuisance parameter the marginal likelihood is then the classical tool in this case then we consider the case where we only have a fixed number of its moments here we may use the maximum entropy me principle to assign a prior law and thus go back to the previous case finally we consider the case where we know only its median in our knowledge there is not any classical tool for this case we propose then a new tool for this case based on a recently proposed alternative distribution to the marginal probability distribution this new criterion is obtained by first remarking that the marginal distribution can be considered as the mean value of the original distribution over the prior probability law of the nuisance parameter and then by using the median in place of the mean in this paper we first summarize the classical tools used for the three first cases then we give the precise definition of this new criterion and its properties and finally present a few examples to show the differences of these cases key words nuisance parameter bayesian inference maximum entropy marginalization incomplete knowledge mean and median of the likelihood over the prior distribution | [['in', 'this', 'paper', 'we', 'consider', 'the', 'problem', 'of', 'estimating', 'a', 'parameter', 'of', 'a', 'probability', 'distribution', 'when', 'we', 'have', 'some', 'prior', 'information', 'on', 'a', 'nuisance', 'parameter', 'we', 'start', 'by', 'the', 'very', 'simple', 'case', 'where', 'we', 'know', 'perfectly', 'the', 'value', 'of', 'the', 'nuisance', 'parameter', 'the', 'complete', 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-0.015813618015248523, 0.0621232775010322, 0.23264829100300174, 0.09602388779263009, 0.04580294851855504, -0.13169081395314064, 0.11419773990923211, 0.025620104813048345] |
708.3 | The Physical Properties of LBGs at z>5: Outflows and the "pre-enrichment
problem" | We discuss the properties of Lyman Break galaxies (LBGs) at z>5 as determined
from disparate fields covering approximately 500 sq. arcmin. While the broad
characteristics of the LBG population has been discussed extensively in the
literature, such as luminosity functions and clustering amplitude, we focus on
the detailed physical properties of the sources in this large survey (>100 with
spectroscopic redshifts). Specifically, we discuss ensemble mass estimates,
stellar mass surface densities, core phase space densities, star-formation
intensities, characteristics of their stellar populations, etc as obtained from
multi-wavelength data (rest-frame UV through optical) for a subsample of these
galaxies. In particular, we focus on evidence that these galaxies drive
vigorous outflows and speculate that this population may solve the so-called
``pre-enrichment problem''. The general picture that emerges from these studies
is that these galaxies, observed about 1 Gyr after the Big Bang, have
properties consistent with being the progenitors of the densest stellar systems
in the local Universe -- the centers of old bulges and early type galaxies.
| astro-ph | we discuss the properties of lyman break galaxies lbgs at z5 as determined from disparate fields covering approximately 500 sq arcmin while the broad characteristics of the lbg population has been discussed extensively in the literature such as luminosity functions and clustering amplitude we focus on the detailed physical properties of the sources in this large survey 100 with spectroscopic redshifts specifically we discuss ensemble mass estimates stellar mass surface densities core phase space densities starformation intensities characteristics of their stellar populations etc as obtained from multiwavelength data restframe uv through optical for a subsample of these galaxies in particular we focus on evidence that these galaxies drive vigorous outflows and speculate that this population may solve the socalled preenrichment problem the general picture that emerges from these studies is that these galaxies observed about 1 gyr after the big bang have properties consistent with being the progenitors of the densest stellar systems in the local universe the centers of old bulges and early type galaxies | [['we', 'discuss', 'the', 'properties', 'of', 'lyman', 'break', 'galaxies', 'lbgs', 'at', 'z5', 'as', 'determined', 'from', 'disparate', 'fields', 'covering', 'approximately', '500', 'sq', 'arcmin', 'while', 'the', 'broad', 'characteristics', 'of', 'the', 'lbg', 'population', 'has', 'been', 'discussed', 'extensively', 'in', 'the', 'literature', 'such', 'as', 'luminosity', 'functions', 'and', 'clustering', 'amplitude', 'we', 'focus', 'on', 'the', 'detailed', 'physical', 'properties', 'of', 'the', 'sources', 'in', 'this', 'large', 'survey', '100', 'with', 'spectroscopic', 'redshifts', 'specifically', 'we', 'discuss', 'ensemble', 'mass', 'estimates', 'stellar', 'mass', 'surface', 'densities', 'core', 'phase', 'space', 'densities', 'starformation', 'intensities', 'characteristics', 'of', 'their', 'stellar', 'populations', 'etc', 'as', 'obtained', 'from', 'multiwavelength', 'data', 'restframe', 'uv', 'through', 'optical', 'for', 'a', 'subsample', 'of', 'these', 'galaxies', 'in', 'particular', 'we', 'focus', 'on', 'evidence', 'that', 'these', 'galaxies', 'drive', 'vigorous', 'outflows', 'and', 'speculate', 'that', 'this', 'population', 'may', 'solve', 'the', 'socalled', 'preenrichment', 'problem', 'the', 'general', 'picture', 'that', 'emerges', 'from', 'these', 'studies', 'is', 'that', 'these', 'galaxies', 'observed', 'about', '1', 'gyr', 'after', 'the', 'big', 'bang', 'have', 'properties', 'consistent', 'with', 'being', 'the', 'progenitors', 'of', 'the', 'densest', 'stellar', 'systems', 'in', 'the', 'local', 'universe', 'the', 'centers', 'of', 'old', 'bulges', 'and', 'early', 'type', 'galaxies']] | [-0.031016878399742678, 0.11178400273805103, -0.0663378296997847, 0.15641428835070076, -0.07531955481102937, -0.017443655220039905, 0.03976438092123941, 0.46953102044693856, -0.13306507365834191, -0.34590652011649076, 0.06927637802436948, -0.28654271564572625, -0.04281935009387243, 0.19024853209168258, -0.014653170629999185, -0.013166003403287515, 0.03233898608911648, -0.11777756516877787, -0.05085545908154763, -0.30487803574539274, 0.3541966041056327, 0.03838404338156064, 0.19543089223913399, -0.053846518874465746, 0.0734030348929038, -0.09823351093646453, -0.08523137790343095, -0.02523472528089068, -0.20316896211101354, 0.0198992044413855, 0.25450696226725555, 0.18202760670732437, 0.2736359039456191, -0.37099596098379556, -0.2361429672273078, 0.09379058825314965, 0.22008884409779167, 0.07073526301965431, -0.10482226554248257, -0.2524232524924025, 0.05350699215701007, -0.13440935222813524, -0.1716079336411533, 0.06953353823600225, 0.023058083350559786, 0.0567320269242866, -0.14398202694340956, 0.16947321039876978, -0.0018219272038024143, 0.1253232626617516, -0.11592533014762406, -0.11752049094949658, -0.07051262505498367, 0.07671895902323346, 0.030700182725944703, 0.03767542999955904, 0.2065912678119648, -0.18520817318819013, -0.01989805304616443, 0.39612434139609876, -0.021105147006147237, 0.047394626031395506, 0.23250857391675195, -0.214788663363735, -0.2147215455461922, 0.09713435976651037, 0.17592520299241374, 0.09061232938414372, -0.1728226528816831, 0.029674609659130248, -0.02572747526959662, 0.20608029223302468, 0.011968788614774302, 0.11917153384476194, 0.3278300423618316, 0.09831351808592094, 0.02687300122988197, 0.06439577655779781, -0.17356180096345292, -0.05133184289043567, -0.23579784202759704, -0.07465087416503265, -0.11590882635630488, 0.1312729257961219, -0.16220209532929655, -0.10249323091793705, 0.3737162723436009, 0.13744589244015515, 0.25289238218627647, 0.09508143514338656, 0.2774671283943287, 0.08145183570899002, 0.13032381455392958, 0.08442464255985904, 0.30324551972549363, 0.16475964365358722, 0.07695579767670392, -0.21189208982192564, 0.03542897866264614, -0.0008957033474783761] |
708.3001 | Anomaly induced effects in a magnetic field | We consider a modification of electrodynamics by an additional light massive
vector field, interacting with the photon via Chern-Simons-like coupling. This
theory predicts observable effects for the experiments studying the propagation
of light in an external magnetic field, very similar to those, predicted by
theories of axion and axion-like particles. We discuss a possible microscopic
origin of this theory from a theory with non-trivial gauge anomaly cancellation
between massive and light particles (including, for example, millicharged
fermions). Due to the conservation of the gauge current, the production of the
new vector field is suppressed at high energies. As a result, this theory can
avoid both stellar bounds (which exist for axions) and the bounds from CMB
considered recently, allowing for positive results in experiments like ALPS,
LIPPS, OSQAR, PVLAS-2, BMV, Q&A, etc.
| hep-ph hep-th | we consider a modification of electrodynamics by an additional light massive vector field interacting with the photon via chernsimonslike coupling this theory predicts observable effects for the experiments studying the propagation of light in an external magnetic field very similar to those predicted by theories of axion and axionlike particles we discuss a possible microscopic origin of this theory from a theory with nontrivial gauge anomaly cancellation between massive and light particles including for example millicharged fermions due to the conservation of the gauge current the production of the new vector field is suppressed at high energies as a result this theory can avoid both stellar bounds which exist for axions and the bounds from cmb considered recently allowing for positive results in experiments like alps lipps osqar pvlas2 bmv qa etc | [['we', 'consider', 'a', 'modification', 'of', 'electrodynamics', 'by', 'an', 'additional', 'light', 'massive', 'vector', 'field', 'interacting', 'with', 'the', 'photon', 'via', 'chernsimonslike', 'coupling', 'this', 'theory', 'predicts', 'observable', 'effects', 'for', 'the', 'experiments', 'studying', 'the', 'propagation', 'of', 'light', 'in', 'an', 'external', 'magnetic', 'field', 'very', 'similar', 'to', 'those', 'predicted', 'by', 'theories', 'of', 'axion', 'and', 'axionlike', 'particles', 'we', 'discuss', 'a', 'possible', 'microscopic', 'origin', 'of', 'this', 'theory', 'from', 'a', 'theory', 'with', 'nontrivial', 'gauge', 'anomaly', 'cancellation', 'between', 'massive', 'and', 'light', 'particles', 'including', 'for', 'example', 'millicharged', 'fermions', 'due', 'to', 'the', 'conservation', 'of', 'the', 'gauge', 'current', 'the', 'production', 'of', 'the', 'new', 'vector', 'field', 'is', 'suppressed', 'at', 'high', 'energies', 'as', 'a', 'result', 'this', 'theory', 'can', 'avoid', 'both', 'stellar', 'bounds', 'which', 'exist', 'for', 'axions', 'and', 'the', 'bounds', 'from', 'cmb', 'considered', 'recently', 'allowing', 'for', 'positive', 'results', 'in', 'experiments', 'like', 'alps', 'lipps', 'osqar', 'pvlas2', 'bmv', 'qa', 'etc']] | [-0.13971344489926615, 0.2690762521396839, -0.054818949163801825, 0.13029399334202305, -0.08380086274387745, -0.14006215527008933, 0.024537722762817373, 0.29424786392885904, -0.20093112088954793, -0.36563864283693526, 0.02587374881662142, -0.27859302590816065, -0.1296613464776713, 0.18759110342138088, 0.027353521049595795, 0.021805869401074374, 0.0018249674037528725, 0.045829322192674646, -0.02911349806549529, -0.20931483972369908, 0.3100145293041491, 0.0743660412943707, 0.23906618860335305, 0.10793589188788946, 0.10351278048295241, 0.02408997958812576, -0.02640488898838297, 0.00452680318759611, -0.08804368277868399, 0.09721989394076025, 0.1699824801216332, 0.07940066727952888, 0.17063427376202667, -0.44228147599273004, -0.2361375110797011, 0.12366422408690246, 0.13446932142743698, 0.149774565471587, -0.14214441388702162, -0.31542130738066937, 0.045713451008598964, -0.14268803036986635, -0.15220075425369523, -0.06509973598787418, -0.037312594809247035, -0.03613094456064014, -0.2961176992035829, 0.05440485070531185, 0.007173120316404563, 0.028649713527053023, -0.06599820626075738, -0.08036531852916456, 0.01792321629070032, 0.0243630928811259, 0.14587077758579442, 0.05000831922068476, 0.13022264535538852, -0.21174191177571908, -0.16000898418446574, 0.4184170042666105, -0.15365051940226784, -0.16230069739170946, 0.1908218745303412, -0.1235695514852593, -0.14143251633683507, 0.1116391800227575, 0.18930658888644897, 0.11066039370981832, -0.1303524765293472, 0.13710299525275613, -0.039569492315730224, 0.12261203308052455, 0.05707934512577664, 0.06956730277205889, 0.3037422314286232, 0.12481120233424008, 0.015572288105837427, 0.0944964257373403, -0.055877770064398646, -0.0826722955765525, -0.33716202625431696, -0.15032175519288732, -0.1213244853541255, 0.06480470091068688, -0.10386904636006175, -0.13703903474737533, 0.34507465552037153, 0.16073042935548493, 0.17338041750212702, 0.005060116005524133, 0.2853925067107551, 0.11627491059838437, 0.08090873217353454, 0.028383680096325966, 0.31839749422998953, 0.1789012239350436, 0.09666158477020172, -0.23373559422638768, -0.06489084423877872, 0.04078371012583375] |
708.3002 | Twisting all the way: from Classical Mechanics to Quantum Fields | We discuss the effects that a noncommutative geometry induced by a Drinfeld
twist has on physical theories. We systematically deform all products and
symmetries of the theory. We discuss noncommutative classical mechanics, in
particular its deformed Poisson bracket and hence time evolution and
symmetries. The twisting is then extended to classical fields, and then to the
main interest of this work: quantum fields. This leads to a geometric
formulation of quantization on noncommutative spacetime, i.e. we establish a
noncommutative correspondence principle from *-Poisson brackets to
*-commutators. In particular commutation relations among creation and
annihilation operators are deduced.
| hep-th math-ph math.MP math.QA | we discuss the effects that a noncommutative geometry induced by a drinfeld twist has on physical theories we systematically deform all products and symmetries of the theory we discuss noncommutative classical mechanics in particular its deformed poisson bracket and hence time evolution and symmetries the twisting is then extended to classical fields and then to the main interest of this work quantum fields this leads to a geometric formulation of quantization on noncommutative spacetime ie we establish a noncommutative correspondence principle from poisson brackets to commutators in particular commutation relations among creation and annihilation operators are deduced | [['we', 'discuss', 'the', 'effects', 'that', 'a', 'noncommutative', 'geometry', 'induced', 'by', 'a', 'drinfeld', 'twist', 'has', 'on', 'physical', 'theories', 'we', 'systematically', 'deform', 'all', 'products', 'and', 'symmetries', 'of', 'the', 'theory', 'we', 'discuss', 'noncommutative', 'classical', 'mechanics', 'in', 'particular', 'its', 'deformed', 'poisson', 'bracket', 'and', 'hence', 'time', 'evolution', 'and', 'symmetries', 'the', 'twisting', 'is', 'then', 'extended', 'to', 'classical', 'fields', 'and', 'then', 'to', 'the', 'main', 'interest', 'of', 'this', 'work', 'quantum', 'fields', 'this', 'leads', 'to', 'a', 'geometric', 'formulation', 'of', 'quantization', 'on', 'noncommutative', 'spacetime', 'ie', 'we', 'establish', 'a', 'noncommutative', 'correspondence', 'principle', 'from', 'poisson', 'brackets', 'to', 'commutators', 'in', 'particular', 'commutation', 'relations', 'among', 'creation', 'and', 'annihilation', 'operators', 'are', 'deduced']] | [-0.13401223811052126, 0.16352076404583976, -0.1142209107344298, 0.12520991957424804, -0.12368922691897864, -0.08939894509127307, -0.007415088971347078, 0.323874933126661, -0.34152421554473716, -0.2423917747741162, 0.04809847600114791, -0.21524190046277242, -0.21075551432663017, 0.15810229516943397, -0.14078929823551437, -0.012472718493825728, -0.0018554224450256407, 0.07245543774591816, -0.18315411598383227, -0.24370103898294962, 0.41511861461013094, 0.04493587249385903, 0.25779995820773094, 0.006719536533262389, 0.11386198681039908, 0.05071687627314907, -0.048713530452211495, 0.013464744189590906, -0.16758563778803925, 0.14301668012457103, 0.20992401486128262, 0.041578713996508684, 0.15022828443379133, -0.4404056587054865, -0.18158692955375486, 0.10619436315328036, 0.10905346079950326, 0.10645003624490856, -0.03614292805774387, -0.31003720050236, 0.02827254172472149, -0.1903553407389632, -0.14112278941500278, -0.09746837657732293, 0.034941121599800194, -0.016919558483761612, -0.20844004093909385, 0.05090534188736653, 0.10437255706062022, 0.03897109748699616, -0.08659104017430398, -0.020468910493571118, -0.031027709916426043, 0.05952439654484084, 0.023712870556880365, -0.015010656884957835, 0.14043461048457118, -0.09863468234129634, -0.1772820735158226, 0.3882839853572899, 0.019021751311098792, -0.2598331298333468, 0.12468657999769929, -0.1630106619367203, -0.20168180713794895, 0.023353029776979044, 0.10785130663899724, 0.10569316132435787, -0.12322611135632261, 0.2041426383255328, -0.025334361484562307, 0.030912364069756466, 0.12269512189014517, 0.06195986283146152, 0.19914462755328602, 0.02195661837119878, 0.03416475031486491, 0.13643561170158006, -0.02090854335518688, -0.20471437146272703, -0.38856894561310407, -0.20192051989856877, -0.09932250980427008, 0.15741747704372963, -0.11876818759906341, -0.14582882122587912, 0.37192582757663484, 0.1565753444393175, 0.16404642746363737, 0.03348392627163569, 0.22406741653655454, 0.15881580306389897, 0.09340749650271897, -0.004414390028483167, 0.20908257582215303, 0.2784238937478897, 0.060725882783839384, -0.16300690517107927, -0.08309853419219863, 0.1660254966544429] |
708.3003 | The dynamics of vortex generation in superfluid 3He-B | A profound change occurs in the stability of quantized vortices in externally
applied flow of superfluid 3He-B at temperatures ~ 0.6 Tc, owing to the rapidly
decreasing damping in vortex motion with decreasing temperature. At low damping
an evolving vortex may become unstable and generate a new independent vortex
loop. This single-vortex instability is the generic precursor to turbulence. We
investigate the instability with non-invasive NMR measurements on a rotating
cylindrical sample in the intermediate temperature regime (0.3 - 0.6) Tc. From
comparisons with numerical calculations we interpret that the instability
occurs at the container wall, when the vortex end moves along the wall in
applied flow.
| cond-mat.stat-mech cond-mat.supr-con | a profound change occurs in the stability of quantized vortices in externally applied flow of superfluid 3heb at temperatures 06 tc owing to the rapidly decreasing damping in vortex motion with decreasing temperature at low damping an evolving vortex may become unstable and generate a new independent vortex loop this singlevortex instability is the generic precursor to turbulence we investigate the instability with noninvasive nmr measurements on a rotating cylindrical sample in the intermediate temperature regime 03 06 tc from comparisons with numerical calculations we interpret that the instability occurs at the container wall when the vortex end moves along the wall in applied flow | [['a', 'profound', 'change', 'occurs', 'in', 'the', 'stability', 'of', 'quantized', 'vortices', 'in', 'externally', 'applied', 'flow', 'of', 'superfluid', '3heb', 'at', 'temperatures', '06', 'tc', 'owing', 'to', 'the', 'rapidly', 'decreasing', 'damping', 'in', 'vortex', 'motion', 'with', 'decreasing', 'temperature', 'at', 'low', 'damping', 'an', 'evolving', 'vortex', 'may', 'become', 'unstable', 'and', 'generate', 'a', 'new', 'independent', 'vortex', 'loop', 'this', 'singlevortex', 'instability', 'is', 'the', 'generic', 'precursor', 'to', 'turbulence', 'we', 'investigate', 'the', 'instability', 'with', 'noninvasive', 'nmr', 'measurements', 'on', 'a', 'rotating', 'cylindrical', 'sample', 'in', 'the', 'intermediate', 'temperature', 'regime', '03', '06', 'tc', 'from', 'comparisons', 'with', 'numerical', 'calculations', 'we', 'interpret', 'that', 'the', 'instability', 'occurs', 'at', 'the', 'container', 'wall', 'when', 'the', 'vortex', 'end', 'moves', 'along', 'the', 'wall', 'in', 'applied', 'flow']] | [-0.19341400417366197, 0.2858245415847272, -0.08143933977310856, 0.011990688133630014, -0.04964310217515699, -0.13862845734914853, 0.04932376431256887, 0.33140560192543833, -0.2653140191698358, -0.24178532273508607, 0.08832235530107505, -0.26059850644142857, -0.022461089367667834, 0.18402624981965693, -0.010375390725121612, 0.019683808203609217, 0.0006402643175706977, 0.00970635673286216, -0.0750701739563651, -0.1398376356721634, 0.2717080664954015, 0.04087816336014796, 0.3493946539149398, 0.03662130400715839, 0.03118017405726104, -0.08525028870284414, 0.05680112774882998, 0.0653490740717167, -0.2263516282333599, -0.056509829486631566, 0.21233728719165637, -0.08908396329283104, 0.23059229912413728, -0.4529804326590411, -0.20910782742180994, 0.01122755247744776, 0.22736530813521572, 0.1845822261202903, -0.07455050790754501, -0.22888228372182876, 0.04671103668709596, -0.14471481540905579, -0.200619165909787, -0.03412173381075263, 0.040765031935491906, -0.0019115852241936538, -0.24641004762656632, 0.13629312237192479, 0.05596791633537838, 0.1274135507977224, -0.11428078262224084, -0.04026479157840922, -0.06505287341063931, 0.026287837671614918, 0.0787275299141627, 0.12919019422981712, 0.21635692219826438, -0.1536256585530715, -0.020576005269374167, 0.3231452211294146, -0.08547214088917134, -0.10663224433859189, 0.21537952023070484, -0.1975570531961109, -0.054194326605647804, 0.2423299840403377, 0.1800154703802296, 0.07620594084451329, -0.024210527196243805, -0.030211275179837165, 0.005784584865683601, 0.1579736630038713, 0.12022616668116479, -0.03937169804370829, 0.30579172793243614, 0.22983306477489393, 0.023605533973092126, 0.18564135241654833, -0.1538758197799325, -0.0957109053308765, -0.2648459583565238, -0.11432618084141896, -0.1428211524062568, 0.021330654190941937, -0.07036062102928381, -0.17544004714027756, 0.34459204069737875, 0.16370083685809125, 0.20875709594471292, -0.03339613396896138, 0.28218610088917473, 0.1281299694651915, 0.08121767620156918, 0.1190556367903593, 0.2912958064781768, 0.1890900198281521, 0.20221544476225972, -0.32059301670330265, 0.007117887532582418, 0.006123684129367272] |
708.3004 | The Far-Infrared Surveyor (FIS) for AKARI | The Far-Infrared Surveyor (FIS) is one of two focal plane instruments on the
AKARI satellite. FIS has four photometric bands at 65, 90, 140, and 160 um, and
uses two kinds of array detectors. The FIS arrays and optics are designed to
sweep the sky with high spatial resolution and redundancy. The actual scan
width is more than eight arcmin, and the pixel pitch is matches the diffraction
limit of the telescope. Derived point spread functions (PSFs) from observations
of asteroids are similar to the optical model. Significant excesses, however,
are clearly seen around tails of the PSFs, whose contributions are about 30% of
the total power. All FIS functions are operating well in orbit, and its
performance meets the laboratory characterizations, except for the two longer
wavelength bands, which are not performing as well as characterized.
Furthermore, the FIS has a spectroscopic capability using a Fourier transform
spectrometer (FTS). Because the FTS takes advantage of the optics and detectors
of the photometer, it can simultaneously make a spectral map. This paper
summarizes the in-flight technical and operational performance of the FIS.
| astro-ph | the farinfrared surveyor fis is one of two focal plane instruments on the akari satellite fis has four photometric bands at 65 90 140 and 160 um and uses two kinds of array detectors the fis arrays and optics are designed to sweep the sky with high spatial resolution and redundancy the actual scan width is more than eight arcmin and the pixel pitch is matches the diffraction limit of the telescope derived point spread functions psfs from observations of asteroids are similar to the optical model significant excesses however are clearly seen around tails of the psfs whose contributions are about 30 of the total power all fis functions are operating well in orbit and its performance meets the laboratory characterizations except for the two longer wavelength bands which are not performing as well as characterized furthermore the fis has a spectroscopic capability using a fourier transform spectrometer fts because the fts takes advantage of the optics and detectors of the photometer it can simultaneously make a spectral map this paper summarizes the inflight technical and operational performance of the fis | [['the', 'farinfrared', 'surveyor', 'fis', 'is', 'one', 'of', 'two', 'focal', 'plane', 'instruments', 'on', 'the', 'akari', 'satellite', 'fis', 'has', 'four', 'photometric', 'bands', 'at', '65', '90', '140', 'and', '160', 'um', 'and', 'uses', 'two', 'kinds', 'of', 'array', 'detectors', 'the', 'fis', 'arrays', 'and', 'optics', 'are', 'designed', 'to', 'sweep', 'the', 'sky', 'with', 'high', 'spatial', 'resolution', 'and', 'redundancy', 'the', 'actual', 'scan', 'width', 'is', 'more', 'than', 'eight', 'arcmin', 'and', 'the', 'pixel', 'pitch', 'is', 'matches', 'the', 'diffraction', 'limit', 'of', 'the', 'telescope', 'derived', 'point', 'spread', 'functions', 'psfs', 'from', 'observations', 'of', 'asteroids', 'are', 'similar', 'to', 'the', 'optical', 'model', 'significant', 'excesses', 'however', 'are', 'clearly', 'seen', 'around', 'tails', 'of', 'the', 'psfs', 'whose', 'contributions', 'are', 'about', '30', 'of', 'the', 'total', 'power', 'all', 'fis', 'functions', 'are', 'operating', 'well', 'in', 'orbit', 'and', 'its', 'performance', 'meets', 'the', 'laboratory', 'characterizations', 'except', 'for', 'the', 'two', 'longer', 'wavelength', 'bands', 'which', 'are', 'not', 'performing', 'as', 'well', 'as', 'characterized', 'furthermore', 'the', 'fis', 'has', 'a', 'spectroscopic', 'capability', 'using', 'a', 'fourier', 'transform', 'spectrometer', 'fts', 'because', 'the', 'fts', 'takes', 'advantage', 'of', 'the', 'optics', 'and', 'detectors', 'of', 'the', 'photometer', 'it', 'can', 'simultaneously', 'make', 'a', 'spectral', 'map', 'this', 'paper', 'summarizes', 'the', 'inflight', 'technical', 'and', 'operational', 'performance', 'of', 'the', 'fis']] | [-0.1079628061008087, 0.07513239620775394, -0.09815652340722199, 0.05770377663941542, -0.05032970915563855, -0.09188229052073599, 0.018024227707288586, 0.4476488215418962, -0.19341586062500438, -0.36619807673352106, 0.1285472007968545, -0.346163064558673, -0.07144294023657075, 0.25177954230329613, -0.03713913290866313, 0.06203884606033431, 0.042364094812540685, -0.07451430367623138, -0.05478979562534592, -0.2226910727190693, 0.24146574203968868, 0.12486101181635244, 0.28132528406542284, -0.040508293718161, 0.15252156014257406, -0.009606618255090255, -0.09395689416451605, -0.01956413483124349, -0.08305201889911237, 0.06324350733340688, 0.27120591044441317, 0.09811375189411382, 0.18677980232994063, -0.3494368798386019, -0.16231057296137985, 0.041560350106210335, 0.10156448951482282, -0.029112866394615803, 0.05275454890047863, -0.28236389833318254, 0.03966345572089367, -0.1160176630146852, -0.11046014067327993, -0.005986900499940001, 0.0034574201908781307, 0.05425347596762579, -0.21061739200408888, -0.01119231402613018, 0.015097192392664051, 0.13334530703007028, -0.09376552018175761, -0.16197123759487583, -0.053583916538308, 0.1287451139625653, -0.04263691563903774, 0.04007664751031201, 0.13765733731798008, -0.10688386498157262, -0.04749191876828343, 0.36943607083086827, -0.04423154455107179, -0.07729304353495456, 0.1840628962669583, -0.2266187819928586, -0.09817007871902456, 0.20617750882693045, 0.08773217953109581, 0.06415521750334717, -0.20773263143728599, 0.07104551802123231, 0.021568027346722453, 0.2129596825441215, 0.12867214504097188, 0.13845169372283495, 0.26237709115382163, 0.16338777899163887, 0.07095905989159032, 0.15144170982159347, -0.3168353259417607, -0.04425999924865459, -0.27233663614734416, -0.11320440764001642, -0.1620288758006479, -0.004891701302267892, -0.06500934867590032, -0.10258808964671526, 0.41370943767417756, 0.15460988066343406, 0.15789507562166674, 0.05539224370559268, 0.3497660596046474, 0.07842225675947023, 0.1661713498716171, 0.008448447272242917, 0.28848808621578326, 0.0595576898489086, 0.11920252810731265, -0.14929246661831513, 0.0031120828045839138, -0.011883303432873768] |
708.3005 | The Struve-Sahade effect in the optical spectra of O-type binaries I.
Main-sequence systems | We present a spectroscopic analysis of four massive binary systems that are
known or are good candidates to display the Struve-Sahade effect (defined as
the apparent strengthening of the secondary spectrum of the binary when the
star is approaching, and the corresponding weakening of the lines when it is
receding).
We use high resolution optical spectra to determine new orbital solutions and
spectral types of HD 165052, HD 100213, HD 159176 and DH Cep. As good knowledge
of the fundamental parameters of the considered systems is necessary to examine
the Struve-Sahade effect. We then study equivalent width variations in the
lines of both components of these binaries during their orbital cycle.
In the case of these four systems, variations appear in the equivalent widths
of some lines during the orbital cycle, but the definition given above can any
longer be valid, since it is now clear that the effect modifies the primary
spectrum as much as the secondary spectrum. Furthermore, the lines affected,
and the way in which they are affected, depend on the considered system. For at
least two of them (HD 100213 and HD 159176) these variations probably reflect
the ellipsoidal variable nature of the system.
| astro-ph | we present a spectroscopic analysis of four massive binary systems that are known or are good candidates to display the struvesahade effect defined as the apparent strengthening of the secondary spectrum of the binary when the star is approaching and the corresponding weakening of the lines when it is receding we use high resolution optical spectra to determine new orbital solutions and spectral types of hd 165052 hd 100213 hd 159176 and dh cep as good knowledge of the fundamental parameters of the considered systems is necessary to examine the struvesahade effect we then study equivalent width variations in the lines of both components of these binaries during their orbital cycle in the case of these four systems variations appear in the equivalent widths of some lines during the orbital cycle but the definition given above can any longer be valid since it is now clear that the effect modifies the primary spectrum as much as the secondary spectrum furthermore the lines affected and the way in which they are affected depend on the considered system for at least two of them hd 100213 and hd 159176 these variations probably reflect the ellipsoidal variable nature of the system | [['we', 'present', 'a', 'spectroscopic', 'analysis', 'of', 'four', 'massive', 'binary', 'systems', 'that', 'are', 'known', 'or', 'are', 'good', 'candidates', 'to', 'display', 'the', 'struvesahade', 'effect', 'defined', 'as', 'the', 'apparent', 'strengthening', 'of', 'the', 'secondary', 'spectrum', 'of', 'the', 'binary', 'when', 'the', 'star', 'is', 'approaching', 'and', 'the', 'corresponding', 'weakening', 'of', 'the', 'lines', 'when', 'it', 'is', 'receding', 'we', 'use', 'high', 'resolution', 'optical', 'spectra', 'to', 'determine', 'new', 'orbital', 'solutions', 'and', 'spectral', 'types', 'of', 'hd', '165052', 'hd', '100213', 'hd', '159176', 'and', 'dh', 'cep', 'as', 'good', 'knowledge', 'of', 'the', 'fundamental', 'parameters', 'of', 'the', 'considered', 'systems', 'is', 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708.3006 | Ihara's lemma for imaginary quadratic fields | An analogue over imaginary quadratic fields of a result in algebraic number
theory known as Ihara's lemma is established. More precisely, we show that for
a prime ideal P of the ring of integers of an imaginary quadratic field F, the
kernel of the sum of the two standard P-degeneracy maps between the cuspidal
sheaf cohomology H^1_!(X_0, M_0)^2 --> H^1_!(X_1, M_1) is Eisenstein. Here X_0
and X_1 are analogues over F of the modular curves X_0(N) and X_0(Np),
respectively. To prove our theorem we use the method of modular symbols and the
congruence subgroup property for the group SL(2) which is due to Serre.
| math.NT | an analogue over imaginary quadratic fields of a result in algebraic number theory known as iharas lemma is established more precisely we show that for a prime ideal p of the ring of integers of an imaginary quadratic field f the kernel of the sum of the two standard pdegeneracy maps between the cuspidal sheaf cohomology h1_x_0 m_02 h1_x_1 m_1 is eisenstein here x_0 and x_1 are analogues over f of the modular curves x_0n and x_0np respectively to prove our theorem we use the method of modular symbols and the congruence subgroup property for the group sl2 which is due to serre | [['an', 'analogue', 'over', 'imaginary', 'quadratic', 'fields', 'of', 'a', 'result', 'in', 'algebraic', 'number', 'theory', 'known', 'as', 'iharas', 'lemma', 'is', 'established', 'more', 'precisely', 'we', 'show', 'that', 'for', 'a', 'prime', 'ideal', 'p', 'of', 'the', 'ring', 'of', 'integers', 'of', 'an', 'imaginary', 'quadratic', 'field', 'f', 'the', 'kernel', 'of', 'the', 'sum', 'of', 'the', 'two', 'standard', 'pdegeneracy', 'maps', 'between', 'the', 'cuspidal', 'sheaf', 'cohomology', 'h1_x_0', 'm_02', 'h1_x_1', 'm_1', 'is', 'eisenstein', 'here', 'x_0', 'and', 'x_1', 'are', 'analogues', 'over', 'f', 'of', 'the', 'modular', 'curves', 'x_0n', 'and', 'x_0np', 'respectively', 'to', 'prove', 'our', 'theorem', 'we', 'use', 'the', 'method', 'of', 'modular', 'symbols', 'and', 'the', 'congruence', 'subgroup', 'property', 'for', 'the', 'group', 'sl2', 'which', 'is', 'due', 'to', 'serre']] | [-0.25518706135423574, 0.04637693995027803, -0.14783122514684996, 0.05974769744565805, -0.09611581854352896, -0.11831078532556391, -0.01885603232699625, 0.2899671305121497, -0.3698839278458947, -0.2009240196773199, 0.06084754703110178, -0.25240253868531626, -0.16573945068838922, 0.27086158261888404, -0.10009247957813469, 0.018826628190869787, -0.012291218605682705, 0.13361468815451694, -0.07485498533809953, -0.3121124904125346, 0.3931777613411535, -0.05329572328488634, 0.1797559573315084, 0.008569042489986228, 0.0856096966479049, 0.04790348723304994, 0.012991332928791191, -0.10898702926087109, -0.11669455423771528, 0.1312208307079143, 0.3049634192515202, 0.050492047565057874, 0.23373029175957646, -0.3501528644219342, -0.09288862063032058, 0.22855823852634527, 0.12575517775904801, -0.030038343823627765, 0.01788668480694101, -0.23184379329434548, 0.14608114110447015, -0.1534140986776111, -0.17894157573505484, -0.07963128723768574, 0.09177450936950857, 0.007342953766423343, -0.3046470562447653, 0.021406521719664034, 0.12974205284468793, 0.18787089575345467, -0.058747812686958396, -0.14949957350377144, -0.04437714614529125, 0.03869354604940974, 0.0242663124844319, 0.07244613237980038, 0.07201742937299188, -0.09403047676790845, -0.095666538666454, 0.3470175357939995, -0.09665521107275378, -0.17150639215333743, 0.07688455643470991, -0.17953335116570346, -0.14387107462354118, 0.10913942313066335, 0.06299797663784991, 0.16029369120363784, -0.0064845868866100454, 0.21092315226372313, -0.15108278758748614, 0.08834803824529353, 0.1239822458409977, -0.007270483079018316, 0.13840648143862685, 0.00033427656844559344, 0.06362592809477285, 0.13960095587765065, 0.001563352636165089, 0.001447340976823159, -0.37275876453842477, -0.22666985895766906, -0.1724351580452287, 0.1462529036710321, -0.12662160928749758, -0.16948614983508983, 0.38974098575235616, 0.06281565942312356, 0.16923085880004848, 0.16778163022168846, 0.23273986375076647, 0.1055627921643206, 0.07973276563176904, 0.04935426544868434, 0.10342497885714619, 0.2631488061049069, -0.0609077975422031, -0.14418186751109632, -0.062112400938540396, 0.17649073284025293] |
708.3007 | On the measurement of B(E2, 0+ -> 2+) using intermediate-energy Coulomb
excitation | Coulomb excitation is a standard method used to extract quadrupole excitation
strengths of even-even nuclei. In typical analyses the reaction is assumed to
be one-step, Coulomb only, and is treated within a semi-classical model. In
this work, fully-quantal coupled-channel calculations are performed for three
test cases in order to determine the importance of multi-step effects, nuclear
contributions, feeding from other states and corrections to the semi-classical
approximation. We study the excitation of 30S, 58Ni and 78Kr on 197Au at ~ 50
AMeV. We find that nuclear effects may contribute more than 10% and that
feeding contributions can be larger than 15%. These corrections do not alter
significantly the published B(E2) values, however an additional theoretical
error of up to 13% should be added to the experimental uncertainty if the
semi-classical model is used. This theoretical error is reduced to less than 7%
when performing a quantal coupled-channel analysis.
| nucl-th nucl-ex | coulomb excitation is a standard method used to extract quadrupole excitation strengths of eveneven nuclei in typical analyses the reaction is assumed to be onestep coulomb only and is treated within a semiclassical model in this work fullyquantal coupledchannel calculations are performed for three test cases in order to determine the importance of multistep effects nuclear contributions feeding from other states and corrections to the semiclassical approximation we study the excitation of 30s 58ni and 78kr on 197au at 50 amev we find that nuclear effects may contribute more than 10 and that feeding contributions can be larger than 15 these corrections do not alter significantly the published be2 values however an additional theoretical error of up to 13 should be added to the experimental uncertainty if the semiclassical model is used this theoretical error is reduced to less than 7 when performing a quantal coupledchannel analysis | [['coulomb', 'excitation', 'is', 'a', 'standard', 'method', 'used', 'to', 'extract', 'quadrupole', 'excitation', 'strengths', 'of', 'eveneven', 'nuclei', 'in', 'typical', 'analyses', 'the', 'reaction', 'is', 'assumed', 'to', 'be', 'onestep', 'coulomb', 'only', 'and', 'is', 'treated', 'within', 'a', 'semiclassical', 'model', 'in', 'this', 'work', 'fullyquantal', 'coupledchannel', 'calculations', 'are', 'performed', 'for', 'three', 'test', 'cases', 'in', 'order', 'to', 'determine', 'the', 'importance', 'of', 'multistep', 'effects', 'nuclear', 'contributions', 'feeding', 'from', 'other', 'states', 'and', 'corrections', 'to', 'the', 'semiclassical', 'approximation', 'we', 'study', 'the', 'excitation', 'of', '30s', '58ni', 'and', '78kr', 'on', '197au', 'at', '50', 'amev', 'we', 'find', 'that', 'nuclear', 'effects', 'may', 'contribute', 'more', 'than', '10', 'and', 'that', 'feeding', 'contributions', 'can', 'be', 'larger', 'than', '15', 'these', 'corrections', 'do', 'not', 'alter', 'significantly', 'the', 'published', 'be2', 'values', 'however', 'an', 'additional', 'theoretical', 'error', 'of', 'up', 'to', '13', 'should', 'be', 'added', 'to', 'the', 'experimental', 'uncertainty', 'if', 'the', 'semiclassical', 'model', 'is', 'used', 'this', 'theoretical', 'error', 'is', 'reduced', 'to', 'less', 'than', '7', 'when', 'performing', 'a', 'quantal', 'coupledchannel', 'analysis']] | [-0.0052201602957211435, 0.1435730410653066, -0.08139753828246994, 0.14613108811437547, -0.009050350725548724, -0.12758655010161232, 0.04495873578109664, 0.36199616067979024, -0.18754604654003904, -0.30824843552346304, -0.00435332187103771, -0.3344275204413762, -0.04012340541342146, 0.19605401086490218, 0.018781611911174268, 0.031024103036269145, 0.06687658710073527, 0.01986924968404721, -0.0950312785093022, -0.2015482082856143, 0.2554877276567436, 0.10636442048755819, 0.21585891295658194, 0.09029153994705579, -0.01135512758429124, -0.016646995225104773, 0.008398126370643508, -0.016422668957440618, -0.1169443840854873, 0.09553934201998444, 0.2629666510723812, 0.03118021116107192, 0.248325946179461, -0.4497616551688885, -0.20345692216635566, 0.08841769311462261, 0.18686444625858065, 0.1942381640937664, 0.007721697325058351, -0.26156148640438914, 0.09615130101136021, -0.2222455567871667, -0.10707205205466853, -0.1124083859756691, 0.016867362540087676, -0.024932514607415166, -0.29421527279311255, 0.09038221909447688, 0.0041744431244745235, 0.05004766554214269, -0.09305195201647608, -0.20992740782692212, -0.006444553500168944, 0.09804976806341598, 0.04741997143719345, 0.04659796647798455, 0.2020472141225146, -0.07113554902464049, -0.0794341239331877, 0.4223612453150627, -0.02947223203466832, -0.18516429447989963, 0.13159397584649302, -0.1665340385221149, -0.11936193655088723, 0.19338138416020378, 0.16810239661382895, 0.12437175379305351, -0.15966616420297364, 0.016246909187940806, 0.04484341439969634, 0.2087620270074894, 0.058370862689390714, 0.01159809944411255, 0.10181321138643647, 0.16313090335660652, -0.031676811251425734, 0.05453289129048879, -0.13922980063027154, -0.13051790951859615, -0.3043373833754904, -0.041765607210922324, -0.12929206415022124, 0.0724928728584878, -0.03036488629582542, -0.06460095561677208, 0.3584057605073449, 0.1562649339560279, 0.17993648440500543, 0.006315989855179334, 0.29003731989340015, 0.12512897127244163, 0.09988922797532573, 0.049162043575899136, 0.3495999856992331, 0.15290660894003838, 0.029204769815917905, -0.2556343209189809, 0.05816923010430924, 0.012728556371868064] |
708.3008 | Exciting Maser Science with New Instruments - the Promise of the EVLA | In the near future, the Expanded Very Large Array (EVLA) will allow surveys
for maser sources with unprecedented sensitivity, spectral coverage and
spectroscopic capabilities. In particular, comprehensive surveys for many maser
species with simultaneous sensitive continuum imaging and absorption studies
will give a comprehensive radio picture of star formation in the Galactic plane
and elsewhere. Very efficient EVLA surveys for H2O megamasers in Active Galacic
Nuclei will be possible to practically arbitrary redshifts.
EVLA and Atacama Large Millimeter Array (ALMA) studies of H2O and SiO masers
will serve as high resolution probes of the innermost envelopes of oxygen-rich
evolved stars and HCN masers of carbon-rich stars.
Farther in the future, the Square Kilometer Array (SKA) promises the
detection of OH gigamasers at all conceivable redshifts and maser astrometry
with unprecedented accuracy.
| astro-ph | in the near future the expanded very large array evla will allow surveys for maser sources with unprecedented sensitivity spectral coverage and spectroscopic capabilities in particular comprehensive surveys for many maser species with simultaneous sensitive continuum imaging and absorption studies will give a comprehensive radio picture of star formation in the galactic plane and elsewhere very efficient evla surveys for h2o megamasers in active galacic nuclei will be possible to practically arbitrary redshifts evla and atacama large millimeter array alma studies of h2o and sio masers will serve as high resolution probes of the innermost envelopes of oxygenrich evolved stars and hcn masers of carbonrich stars farther in the future the square kilometer array ska promises the detection of oh gigamasers at all conceivable redshifts and maser astrometry with unprecedented accuracy | [['in', 'the', 'near', 'future', 'the', 'expanded', 'very', 'large', 'array', 'evla', 'will', 'allow', 'surveys', 'for', 'maser', 'sources', 'with', 'unprecedented', 'sensitivity', 'spectral', 'coverage', 'and', 'spectroscopic', 'capabilities', 'in', 'particular', 'comprehensive', 'surveys', 'for', 'many', 'maser', 'species', 'with', 'simultaneous', 'sensitive', 'continuum', 'imaging', 'and', 'absorption', 'studies', 'will', 'give', 'a', 'comprehensive', 'radio', 'picture', 'of', 'star', 'formation', 'in', 'the', 'galactic', 'plane', 'and', 'elsewhere', 'very', 'efficient', 'evla', 'surveys', 'for', 'h2o', 'megamasers', 'in', 'active', 'galacic', 'nuclei', 'will', 'be', 'possible', 'to', 'practically', 'arbitrary', 'redshifts', 'evla', 'and', 'atacama', 'large', 'millimeter', 'array', 'alma', 'studies', 'of', 'h2o', 'and', 'sio', 'masers', 'will', 'serve', 'as', 'high', 'resolution', 'probes', 'of', 'the', 'innermost', 'envelopes', 'of', 'oxygenrich', 'evolved', 'stars', 'and', 'hcn', 'masers', 'of', 'carbonrich', 'stars', 'farther', 'in', 'the', 'future', 'the', 'square', 'kilometer', 'array', 'ska', 'promises', 'the', 'detection', 'of', 'oh', 'gigamasers', 'at', 'all', 'conceivable', 'redshifts', 'and', 'maser', 'astrometry', 'with', 'unprecedented', 'accuracy']] | [-0.07629451132737673, 0.07910864499684137, 0.048528584841495526, 0.037965086446358605, -0.12814039155984155, -0.08987083008709865, 0.042281045203708345, 0.4852331238583876, -0.1067872112007955, -0.29888035704453403, 0.12296173158612804, -0.2850672569090071, 0.005720118594427522, 0.18058916453558665, 0.04171572057888485, -0.026179393065663484, 0.14860276342727818, -0.22812624123269834, -0.01729768250325623, -0.21617211963121707, 0.1549604241700413, 0.2379352657804982, 0.16027803431050136, 0.0098616945458791, 0.04339054954560617, -0.20440723287084928, -0.14054939321325108, -0.036938717115957004, -0.1542971115572772, 0.08838089228822635, 0.44102220850495194, 0.17257892462210014, 0.19039901978192994, -0.3718430084319642, -0.21475900682047583, 0.05407893569566882, 0.2125772025400343, 0.08083927168940695, 0.003802775233410872, -0.3190930689434306, -0.006233665616197798, -0.18998903170801126, -0.29038929896285903, 0.026796903181821107, 0.05835534571311795, 0.11551341242694224, -0.21240810375177085, 0.05058028948170921, -0.07228564059814044, 0.14634011002400746, -0.11031810760211486, -0.1834184353812956, -0.023939684389803845, 0.0905573028112905, -0.09998826035656608, 0.07872234323921685, 0.14014822301956323, -0.17413933927981326, -0.03251239717938006, 0.40622140736713147, -0.12988457520035668, 0.009394451617621459, 0.275823251129343, -0.3091985609382391, -0.32458469927167666, 0.21406252872771941, 0.18964673813125746, 0.12133406384203296, -0.1321209131453473, -0.03435109435679176, 0.021061993418977812, 0.22729159616507016, 0.08666455010713364, 0.19568316838345848, 0.43431011826659627, 0.1514313033889406, 0.16471824915318464, 0.11715114220681314, -0.33158260366091363, 0.016386423526385512, -0.2233092170674354, -0.10235183867625892, -0.1245662701011707, 0.13719993721908674, -0.13628590730155477, -0.037068656351542675, 0.30233293677178713, 0.10437686232393249, 0.08598819163878663, -0.00282332064727178, 0.3278308863250109, -0.06423794228243283, 0.12524906205676067, 0.020871677772643475, 0.3484573905463689, 0.151918367554362, 0.17258637810054306, -0.18959801161769205, 0.046652937300789815, -0.058151824886982256] |
708.3009 | BMW algebra, quantized coordinate algebra and type C Schur--Weyl duality | We prove an integral version of the Schur--Weyl duality between the
specialized Birman--Murakami--Wenzl algebra $B_n(-q^{2m+1},q)$ and the quantum
algebra associated to the symplectic Lie algebra sp_{2m}. In particular, we
deduce that this Schur--Weyl duality holds over arbitrary (commutative) ground
rings, which answers a question of Lehrer and Zhang [Strongly multiplicity free
modules for Lie algebras and quantum groups, J. Algebra (1) 306 (2006),
138--174] in the symplectic case. As a byproduct, we show that, as
$Z[q,q^{-1}]$-algebra, the quantized coordinate algebra defined by Kashiwara is
isomorphic to the quantized coordinate algebra arising from a generalized
Faddeev--Reshetikhin--Takhtajan's construction.
| math.QA math.RT | we prove an integral version of the schurweyl duality between the specialized birmanmurakamiwenzl algebra b_nq2m1q and the quantum algebra associated to the symplectic lie algebra sp_2m in particular we deduce that this schurweyl duality holds over arbitrary commutative ground rings which answers a question of lehrer and zhang strongly multiplicity free modules for lie algebras and quantum groups j algebra 1 306 2006 138174 in the symplectic case as a byproduct we show that as zqq1algebra the quantized coordinate algebra defined by kashiwara is isomorphic to the quantized coordinate algebra arising from a generalized faddeevreshetikhintakhtajans construction | [['we', 'prove', 'an', 'integral', 'version', 'of', 'the', 'schurweyl', 'duality', 'between', 'the', 'specialized', 'birmanmurakamiwenzl', 'algebra', 'b_nq2m1q', 'and', 'the', 'quantum', 'algebra', 'associated', 'to', 'the', 'symplectic', 'lie', 'algebra', 'sp_2m', 'in', 'particular', 'we', 'deduce', 'that', 'this', 'schurweyl', 'duality', 'holds', 'over', 'arbitrary', 'commutative', 'ground', 'rings', 'which', 'answers', 'a', 'question', 'of', 'lehrer', 'and', 'zhang', 'strongly', 'multiplicity', 'free', 'modules', 'for', 'lie', 'algebras', 'and', 'quantum', 'groups', 'j', 'algebra', '1', '306', '2006', '138174', 'in', 'the', 'symplectic', 'case', 'as', 'a', 'byproduct', 'we', 'show', 'that', 'as', 'zqq1algebra', 'the', 'quantized', 'coordinate', 'algebra', 'defined', 'by', 'kashiwara', 'is', 'isomorphic', 'to', 'the', 'quantized', 'coordinate', 'algebra', 'arising', 'from', 'a', 'generalized', 'faddeevreshetikhintakhtajans', 'construction']] | [-0.18873784227964832, 0.06130567963033252, -0.08330747997894397, 0.06762453854785037, -0.1425926850339317, -0.16812778467251716, -0.04444976826451476, 0.3147933201196239, -0.41340884378650633, -0.20369085639148302, 0.08716902316993345, -0.17915551632177085, -0.1690541783641295, 0.18429664666157053, -0.19056352111510932, -0.09313096733429753, 0.06696433055659999, 0.10561134560418356, -0.13555476990143728, -0.27191321009203145, 0.4000716923290621, 0.03782726055309784, 0.2589364040673979, -0.00426913948689142, 0.14629742973635945, 0.11769553064874819, -0.018532016765042816, -0.025662235267784283, -0.16024833015225062, 0.10725322989468544, 0.36236630629181216, 0.04470252389159134, 0.16980220885536412, -0.33872490493661683, -0.030958420462569768, 0.14188213388779727, 0.16582951117458794, 0.0399072662985418, -0.039340590844601495, -0.2839835598968658, 0.053623080557293215, -0.2781732418047993, -0.12993398029863348, -0.053318315408314054, 0.07635453680489698, -0.03804636934934103, -0.2358591686124387, 0.027501846410577065, 0.1208245536039138, 0.15810226963873467, -0.11187457226459747, -0.07893770938718934, -0.07554793940938037, 0.04182494926246126, -0.12052158559115765, 0.063679359544514, 0.11935446945236712, -0.05531831615877783, -0.23898904568151288, 0.31712924197073217, 0.011859157365625319, -0.21918203122913837, 0.12986267956338174, -0.18107029721242093, -0.21424647275252146, 0.04119614619032844, 0.01344296902053706, 0.12225414590869585, -0.020885331991493054, 0.24418985735404852, -0.18947797233198324, -0.01054201497817817, 0.10254215343814829, 0.004419012248273129, 0.10603468486553301, 0.004966692591551691, 0.05189911839957147, 0.14392450500441634, 0.07806709147521558, -0.08249086793512106, -0.3715642036708153, -0.24276879143618987, -0.1285903177796053, 0.20206566536596612, -0.08027680785064308, -0.12520732613452507, 0.3691688386075523, 0.0991229911451228, 0.16377520574378254, 0.11209050997327406, 0.14822756499052048, 0.09777535689215217, 0.11204482852886229, 0.07136466696671129, 0.10090613608127055, 0.34438221053594886, 0.027975220044659774, -0.14990560379152632, -0.1526750308390626, 0.27791708514458785] |
708.301 | Prospects of Open Charm Production at GSI-FAIR and J-PARC | We present a detailed phenomenological study of the prospects of open charm
physics at the future $\bar{p}p$ and $pp$ facilities GSI-FAIR and J-PARC,
respectively. In particular, we concentrate on differential cross sections and
the charge and longitudinal double-spin asymmetries at next-to-leading order
accuracy. Theoretical uncertainties for the proposed observables are estimated
by varying the charm quark mass and the renormalization and factorization
scales.
| hep-ph | we present a detailed phenomenological study of the prospects of open charm physics at the future barpp and pp facilities gsifair and jparc respectively in particular we concentrate on differential cross sections and the charge and longitudinal doublespin asymmetries at nexttoleading order accuracy theoretical uncertainties for the proposed observables are estimated by varying the charm quark mass and the renormalization and factorization scales | [['we', 'present', 'a', 'detailed', 'phenomenological', 'study', 'of', 'the', 'prospects', 'of', 'open', 'charm', 'physics', 'at', 'the', 'future', 'barpp', 'and', 'pp', 'facilities', 'gsifair', 'and', 'jparc', 'respectively', 'in', 'particular', 'we', 'concentrate', 'on', 'differential', 'cross', 'sections', 'and', 'the', 'charge', 'and', 'longitudinal', 'doublespin', 'asymmetries', 'at', 'nexttoleading', 'order', 'accuracy', 'theoretical', 'uncertainties', 'for', 'the', 'proposed', 'observables', 'are', 'estimated', 'by', 'varying', 'the', 'charm', 'quark', 'mass', 'and', 'the', 'renormalization', 'and', 'factorization', 'scales']] | [-0.0717873327796244, 0.1845488657967912, -0.08880530726460237, 0.14969112187446582, -0.025621044937343823, -0.06255947922666867, 0.03421201844078799, 0.33631643024273217, -0.17686816318965856, -0.2666950787654117, 0.006843898502651543, -0.3842283659392879, 0.06896739466381925, 0.15581861629136026, 0.11221792035928321, 0.17926493499221074, 0.09873024192416952, -0.05156113376604423, -0.09478599863452097, -0.2079599266723981, 0.3213105680095771, 0.09402592375224071, 0.21078199345529788, 0.2639672786647838, 0.06277970996286188, 0.04255661159931194, -0.13288237843366843, -0.059444772426985086, -0.17896986091906752, 0.06940702318734977, 0.2854205100115256, 0.034037337783494936, 0.11178316885886329, -0.38113859402281897, -0.07943752945755564, 0.045074516419498695, 0.12106037550857143, 0.09601790163784273, -0.05463312713185414, -0.30498035973499693, 0.07840724103429932, -0.2165593687326662, -0.13254958276622117, -0.10550590571282166, 0.018057138245138857, -0.016592353789342776, -0.30652793187884586, 0.10329081833599106, -0.11291529149526641, 0.07943698416449248, 0.024841907825912276, -0.2748411540829, -0.033690069155353636, 0.03439681061233083, 0.09141949777092252, 0.0686025973668115, 0.17475441214998091, -0.1825598843380927, -0.1978654840162822, 0.3777316076207965, -0.040648732302961725, -0.15614126069796463, 0.09755979771060604, -0.2619583963653043, -0.16842092384052063, 0.05897841939613933, 0.30921020454889725, 0.08550618142480888, -0.1864202461456732, 0.12193377657667807, 0.018557752595312657, 0.1343019948588566, 0.062349933816770474, 0.05883979833027023, 0.1780825238822708, 0.25584382096320274, -0.039742991490851316, -0.023628676310181618, -0.1559738565369376, -0.06663380548476226, -0.4370611880329393, -0.08264175503115569, -0.0027934273941412806, 0.03363323899074679, -0.06369275244050807, -0.00992815348777979, 0.40941892236116384, 0.13583340458278562, 0.2725227458757304, 0.01010802827243294, 0.3474608270954045, 0.08025427468653236, 0.011143063239398458, 0.08137730977660607, 0.284651298818755, 0.18721381903419065, 0.18305678922121252, -0.3083632332938058, 0.03291241626536089, 0.01777755766220036] |
708.3011 | The design and performance of the ZEUS Micro Vertex detector | In order to extend the tracking acceptance, to improve the primary and
secondary vertex reconstruction and thus enhancing the tagging capabilities for
short lived particles, the ZEUS experiment at the HERA Collider at DESY
installed a silicon strip vertex detector. The barrel part of the detector is a
63 cm long cylinder with silicon sensors arranged around an elliptical
beampipe. The forward part consists of four circular shaped disks. In total
just over 200k channels are read out using $2.9 {\rm m^2}$ of silicon. In this
report a detailed overview of the design and construction of the detector is
given and the performance of the completed system is reviewed.
| physics.ins-det | in order to extend the tracking acceptance to improve the primary and secondary vertex reconstruction and thus enhancing the tagging capabilities for short lived particles the zeus experiment at the hera collider at desy installed a silicon strip vertex detector the barrel part of the detector is a 63 cm long cylinder with silicon sensors arranged around an elliptical beampipe the forward part consists of four circular shaped disks in total just over 200k channels are read out using 29 rm m2 of silicon in this report a detailed overview of the design and construction of the detector is given and the performance of the completed system is reviewed | [['in', 'order', 'to', 'extend', 'the', 'tracking', 'acceptance', 'to', 'improve', 'the', 'primary', 'and', 'secondary', 'vertex', 'reconstruction', 'and', 'thus', 'enhancing', 'the', 'tagging', 'capabilities', 'for', 'short', 'lived', 'particles', 'the', 'zeus', 'experiment', 'at', 'the', 'hera', 'collider', 'at', 'desy', 'installed', 'a', 'silicon', 'strip', 'vertex', 'detector', 'the', 'barrel', 'part', 'of', 'the', 'detector', 'is', 'a', '63', 'cm', 'long', 'cylinder', 'with', 'silicon', 'sensors', 'arranged', 'around', 'an', 'elliptical', 'beampipe', 'the', 'forward', 'part', 'consists', 'of', 'four', 'circular', 'shaped', 'disks', 'in', 'total', 'just', 'over', '200k', 'channels', 'are', 'read', 'out', 'using', '29', 'rm', 'm2', 'of', 'silicon', 'in', 'this', 'report', 'a', 'detailed', 'overview', 'of', 'the', 'design', 'and', 'construction', 'of', 'the', 'detector', 'is', 'given', 'and', 'the', 'performance', 'of', 'the', 'completed', 'system', 'is', 'reviewed']] | [-0.11181437799604524, 0.11208035324931405, -0.03713494819512061, -0.025662632327988197, -0.01222181098467303, -0.1387322740832241, -0.04462763188628975, 0.3661115850373214, -0.17093855066549615, -0.3393178445654451, 0.09300848222316302, -0.3752798948847099, 0.01768646119247883, 0.16569124323469714, -0.00712464534498136, 0.0755694447461208, 0.1267710353905728, 0.010620463381034381, -0.0762554838774948, -0.24304501905101736, 0.21271501287151504, 0.18204221464351777, 0.2574375562472354, 0.054507622922505806, 0.1576636434284919, 0.0491655029403473, -0.07837984390736241, -0.039672803120909754, -0.1039207962281797, 0.0607538983106203, 0.284111944375423, 0.07220774621984691, 0.19291693731766502, -0.44774767084884537, -0.0814269005701185, 0.03659154840856107, 0.12730713144645367, 0.008719506331745092, -0.06507231235299088, -0.2904358329550457, 0.12192344130230469, -0.20245171810389248, -0.1498447678782422, 0.09615447369634832, 0.026903356070878036, -0.010337884657495066, -0.2171640322936716, -0.05977414662355916, 0.03885258473626791, 0.056108333563449186, -0.0032628256434557635, -0.16308123813493502, 0.023967411127710423, 0.09532167559592139, -0.04920828748930143, 0.05358314010476984, 0.2038915916046965, -0.11450384277636784, -0.1037359404048686, 0.3045656663715976, -0.019862244605223452, -0.12748623299284265, 0.1640745680159761, -0.22038223333827672, -0.06059156311675906, 0.19823156900857702, 0.2222428486656842, 0.0901425214347626, -0.19584955015313735, 0.04924637177284089, 0.005275384819886963, 0.17883699612879972, 0.1158497631122623, 0.05038330568547506, 0.25176177817448087, 0.29863600023389886, 0.0549859494289144, 0.16393806005148814, -0.1855185681039792, -0.014445303240790963, -0.376575605208994, -0.13395211105517948, -0.09775191722993115, 0.003295562952039165, 0.0016115950596723876, -0.09339126665999584, 0.3966473356965895, 0.06349934752466618, 0.2057676310010186, -0.012785778968347185, 0.29498538192054, 0.007093898012140476, 0.13226036452223683, 0.031192613721140575, 0.2932067763470455, 0.12855807965228316, 0.1820310197477955, -0.20431719172250376, -0.0031711438952714477, 0.026855094556978674] |
708.3012 | Perturbation Expansion for Option Pricing with Stochastic Volatility | We fit the volatility fluctuations of the S&P 500 index well by a Chi
distribution, and the distribution of log-returns by a corresponding
superposition of Gaussian distributions. The Fourier transform of this is,
remarkably, of the Tsallis type. An option pricing formula is derived from the
same superposition of Black-Scholes expressions. An explicit analytic formula
is deduced from a perturbation expansion around a Black-Scholes formula with
the mean volatility. The expansion has two parts. The first takes into account
the non-Gaussian character of the stock-fluctuations and is organized by powers
of the excess kurtosis, the second is contract based, and is organized by the
moments of moneyness of the option. With this expansion we show that for the
Dow Jones Euro Stoxx 50 option data, a Delta-hedging strategy is close to being
optimal.
| q-fin.PR cond-mat.stat-mech math-ph math.MP physics.data-an physics.soc-ph | we fit the volatility fluctuations of the sp 500 index well by a chi distribution and the distribution of logreturns by a corresponding superposition of gaussian distributions the fourier transform of this is remarkably of the tsallis type an option pricing formula is derived from the same superposition of blackscholes expressions an explicit analytic formula is deduced from a perturbation expansion around a blackscholes formula with the mean volatility the expansion has two parts the first takes into account the nongaussian character of the stockfluctuations and is organized by powers of the excess kurtosis the second is contract based and is organized by the moments of moneyness of the option with this expansion we show that for the dow jones euro stoxx 50 option data a deltahedging strategy is close to being optimal | [['we', 'fit', 'the', 'volatility', 'fluctuations', 'of', 'the', 'sp', '500', 'index', 'well', 'by', 'a', 'chi', 'distribution', 'and', 'the', 'distribution', 'of', 'logreturns', 'by', 'a', 'corresponding', 'superposition', 'of', 'gaussian', 'distributions', 'the', 'fourier', 'transform', 'of', 'this', 'is', 'remarkably', 'of', 'the', 'tsallis', 'type', 'an', 'option', 'pricing', 'formula', 'is', 'derived', 'from', 'the', 'same', 'superposition', 'of', 'blackscholes', 'expressions', 'an', 'explicit', 'analytic', 'formula', 'is', 'deduced', 'from', 'a', 'perturbation', 'expansion', 'around', 'a', 'blackscholes', 'formula', 'with', 'the', 'mean', 'volatility', 'the', 'expansion', 'has', 'two', 'parts', 'the', 'first', 'takes', 'into', 'account', 'the', 'nongaussian', 'character', 'of', 'the', 'stockfluctuations', 'and', 'is', 'organized', 'by', 'powers', 'of', 'the', 'excess', 'kurtosis', 'the', 'second', 'is', 'contract', 'based', 'and', 'is', 'organized', 'by', 'the', 'moments', 'of', 'moneyness', 'of', 'the', 'option', 'with', 'this', 'expansion', 'we', 'show', 'that', 'for', 'the', 'dow', 'jones', 'euro', 'stoxx', '50', 'option', 'data', 'a', 'deltahedging', 'strategy', 'is', 'close', 'to', 'being', 'optimal']] | [-0.08215159886855293, 0.07357220516198802, -0.18459752906170307, 0.12255377008202203, -0.0655316814998955, -0.07968608305126315, 0.04521785593224746, 0.32736970867368986, -0.2794197455796441, -0.26829010136795906, 0.12602896338582717, -0.3006517758776406, -0.10143293743727333, 0.18933588202873414, -0.049221644453196364, -0.0004255956278718782, -0.036076783731749114, 0.034594060951900305, -0.01534788616470795, -0.22497415896081788, 0.2765205323845624, 0.07107000167580378, 0.29185063076544215, -0.004182273141905722, 0.12785866848196636, 0.0001939689849898445, -0.05118156193136449, -0.04371557515784816, -0.12265976198983536, 0.16804747871003312, 0.18365846006869987, 0.07807332728142766, 0.2798084915284011, -0.36674826073629613, -0.1461885661789865, 0.08581542081171364, 0.07516146869271655, 0.04249687456511751, 0.006977640438091123, -0.25965060920906113, 0.01762476747601547, -0.2499869067475877, -0.1573842470251927, -0.06093847685295976, 0.07714124283555782, 0.04908784585087701, -0.34548970633609727, 0.11779090143902453, 0.050437823089658086, 0.02993262050519909, -0.055902602826597904, -0.15523471477949483, -0.001950592146551406, 0.07898314126456778, 0.10118281500675066, -0.04334738063731824, 0.08857193071162328, -0.11369747886739347, -0.11974098236180108, 0.3792970112214486, -0.13715743034316058, -0.15889624976129693, 0.026389494559473613, -0.18609861502861322, -0.05653989436034339, 0.16278247531524606, 0.09566739126052143, 0.06606009797983323, -0.16825006889518013, 0.09925939070605884, -0.05287781408740998, 0.13329933147267156, 0.08209248524949406, -0.06138275759506293, 0.17765613966692012, 0.11630652571329847, 0.042694876697196654, 0.17781097189237532, -0.1017651196964311, -0.14749855989816063, -0.33216392146564566, -0.15895067029773738, -0.23476129599536458, 0.04595431710141852, -0.17298954526268062, -0.15580005231172298, 0.4084135787561536, 0.07551397338234396, 0.17385965126127165, 0.10949292844937493, 0.2864530269254112, 0.22792312192420164, 0.02002538093912528, 0.0920209548573687, 0.15540461243962814, 0.1032720825310345, 0.10699855569912346, -0.15687271093470787, 0.13822079237875048, 0.06136176327356335] |
708.3013 | Bayesian segmentation of hyperspectral images | In this paper we consider the problem of joint segmentation of hyperspectral
images in the Bayesian framework. The proposed approach is based on a Hidden
Markov Modeling (HMM) of the images with common segmentation, or equivalently
with common hidden classification label variables which is modeled by a Potts
Markov Random Field. We introduce an appropriate Markov Chain Monte Carlo
(MCMC) algorithm to implement the method and show some simulation results.
| physics.data-an | in this paper we consider the problem of joint segmentation of hyperspectral images in the bayesian framework the proposed approach is based on a hidden markov modeling hmm of the images with common segmentation or equivalently with common hidden classification label variables which is modeled by a potts markov random field we introduce an appropriate markov chain monte carlo mcmc algorithm to implement the method and show some simulation results | [['in', 'this', 'paper', 'we', 'consider', 'the', 'problem', 'of', 'joint', 'segmentation', 'of', 'hyperspectral', 'images', 'in', 'the', 'bayesian', 'framework', 'the', 'proposed', 'approach', 'is', 'based', 'on', 'a', 'hidden', 'markov', 'modeling', 'hmm', 'of', 'the', 'images', 'with', 'common', 'segmentation', 'or', 'equivalently', 'with', 'common', 'hidden', 'classification', 'label', 'variables', 'which', 'is', 'modeled', 'by', 'a', 'potts', 'markov', 'random', 'field', 'we', 'introduce', 'an', 'appropriate', 'markov', 'chain', 'monte', 'carlo', 'mcmc', 'algorithm', 'to', 'implement', 'the', 'method', 'and', 'show', 'some', 'simulation', 'results']] | [-0.01873044805335147, 0.05110258146243203, -0.06625625743929829, 0.08144899880945948, -0.08737992005688804, -0.1603634910524956, 0.03391917876267273, 0.48693303726613524, -0.2995687452011875, -0.31663719232061077, 0.12433073859595295, -0.20865129136613436, -0.1660080267282735, 0.11493056360299565, -0.07886024968964712, 0.10619224714381355, 0.1297135034043874, 0.049556274459298166, -0.03816372492084546, -0.22460131968504615, 0.2795953413405057, 0.04866165590605565, 0.31341679262529526, -0.08735744639998302, 0.19548026327309864, 0.08400149935457324, -0.05170379293683384, -0.017181319051555226, -0.11728124656781022, 0.15190914160006547, 0.26573180319475276, 0.16931506745916391, 0.3263509971222707, -0.37906562137816635, -0.27591588735314354, 0.14476347769211445, 0.13890703562647105, 0.1207108177061725, -0.021341241791378706, -0.37265750600823333, 0.06497007399863963, -0.15924737622429216, -0.00500265424738505, -0.08503695703111588, -0.14411942213773726, -0.004800993257335254, -0.33079572029943977, 0.06362440797633358, 0.07038295614267034, 0.07313261388667992, -0.01814537118854267, -0.10432885545638523, 0.028830046499414102, 0.05795375377804573, 0.044650194364865975, 0.03663241327740252, 0.08915941008100552, -0.11074589078115034, -0.22200539352904472, 0.3046323624040399, -0.05627220763957926, -0.27578404173254967, 0.16224673150572927, -0.0197589765502406, -0.242396967505504, 0.13075208171004696, 0.19083733589255383, 0.18683082549167532, -0.1974193986638316, 0.08641678607673384, -0.08344590231510145, 0.17755622477935892, -0.07060299822395401, -0.09838182516396046, 0.15853836206453187, 0.260689830620374, 0.01853367048149396, 0.2336589597265369, -0.18263148151870284, -0.15141527711280756, -0.24291501581901684, -0.1523939006562744, -0.24516584133463246, -0.018374253516750677, -0.1451302718236028, -0.2533753185399941, 0.36571405097576126, 0.2954584117592276, 0.19312753351405262, 0.11464562659717298, 0.3212316003428506, 0.09397510131821037, -0.0012670607971293586, 0.08455769663144436, 0.06914300787736595, 0.12479105682577937, 0.031515817909634536, -0.1629399458279035, 0.09506455868416067, 0.11358988217335926] |
708.3014 | Explicit formulas for efficient multiplication in F_{3^{6m}} | Efficient computation of the Tate pairing is an important part of
pairing-based cryptography. Recently with the introduction of the Duursma-Lee
method special attention has been given to the fields of characteristic 3.
Especially multiplication in F_{3^{6m}}, where m is prime, is an important
operation in the above method. In this paper we propose a new method to reduce
the number of F_{3^m} multiplications for multiplication in F_{3^{6m}} from 18
in recent implementations to 15. The method is based on the fast Fourier
tranmsform and explicit formulas are given. The execution times of our software
implementations for F_{3^{6m}} show the efficiency of our results.
| cs.CR cs.CC | efficient computation of the tate pairing is an important part of pairingbased cryptography recently with the introduction of the duursmalee method special attention has been given to the fields of characteristic 3 especially multiplication in f_36m where m is prime is an important operation in the above method in this paper we propose a new method to reduce the number of f_3m multiplications for multiplication in f_36m from 18 in recent implementations to 15 the method is based on the fast fourier tranmsform and explicit formulas are given the execution times of our software implementations for f_36m show the efficiency of our results | [['efficient', 'computation', 'of', 'the', 'tate', 'pairing', 'is', 'an', 'important', 'part', 'of', 'pairingbased', 'cryptography', 'recently', 'with', 'the', 'introduction', 'of', 'the', 'duursmalee', 'method', 'special', 'attention', 'has', 'been', 'given', 'to', 'the', 'fields', 'of', 'characteristic', '3', 'especially', 'multiplication', 'in', 'f_36m', 'where', 'm', 'is', 'prime', 'is', 'an', 'important', 'operation', 'in', 'the', 'above', 'method', 'in', 'this', 'paper', 'we', 'propose', 'a', 'new', 'method', 'to', 'reduce', 'the', 'number', 'of', 'f_3m', 'multiplications', 'for', 'multiplication', 'in', 'f_36m', 'from', '18', 'in', 'recent', 'implementations', 'to', '15', 'the', 'method', 'is', 'based', 'on', 'the', 'fast', 'fourier', 'tranmsform', 'and', 'explicit', 'formulas', 'are', 'given', 'the', 'execution', 'times', 'of', 'our', 'software', 'implementations', 'for', 'f_36m', 'show', 'the', 'efficiency', 'of', 'our', 'results']] | [-0.13218447234015912, 0.040557845400471706, -0.08033586638979613, 0.015747243211371824, -0.04696667377604172, -0.10969050639774651, -8.876216015778482e-05, 0.3799444491788745, -0.23711610224097968, -0.32177366465330126, 0.12059531796141527, -0.19890600586979418, -0.16700942961499096, 0.28473584957188, -0.12502536927248, 0.06366717989789322, 0.023698086163494735, 0.06485676903277636, -0.08840508370660245, -0.3085762799717486, 0.2979482196457684, 0.06530447015538812, 0.26338874735403806, 0.06569680658169091, 0.06790184097364545, -0.0027251905808225274, -0.061737851575016975, -0.07839087499305605, -0.053286099527031186, 0.17234584941063077, 0.2571120427362621, 0.13386975140543655, 0.2892085927352309, -0.4065962022356689, -0.13601391105912625, 0.09468925370485522, 0.13736704928800464, 0.10351299366913735, -0.08091792136081494, -0.21333798874169588, 0.13325901819393038, -0.18818421280942857, -0.07891279630392091, -0.09929416926112027, 0.07364858047105372, 0.030159767530858517, -0.2717268559522927, 0.006408358295448125, 0.07007714297855273, 0.0748182666581124, -0.01225637404160807, -0.15163619244471194, 0.07137025373056531, 0.08669370295945555, 0.0355187561456114, 0.040739407180808485, 0.06600358489435167, -0.11779243773082271, -0.12440793849527836, 0.3623630766198039, -0.024308383795432747, -0.1551163377868943, 0.1410480730677955, -0.0896560602588579, -0.16202980577712878, 0.1490033331385348, 0.15996593663468958, 0.15097072150558233, -0.07794765801168978, 0.12387199888878968, -0.03661465322598815, 0.14408184428233653, 0.03385280263144523, 0.00848867816850543, 0.10997950973920524, 0.19630433686077595, 0.05288916447199881, 0.14423518860479817, -0.08436826481716707, -0.07222453635185958, -0.2918569561839104, -0.21000034537166357, -0.19353372184094042, 0.03268705796450377, -0.06534070136942319, -0.12731413712259382, 0.41336024036630986, 0.1751686887606047, 0.18119792795274406, 0.04531641249544918, 0.34797899102792146, 0.11881351550342516, 0.11510303619957994, 0.10288126839324832, 0.17366013599559665, 0.14020658808760345, 0.0870868112007156, -0.17469539241632448, 0.02927951872930862, 0.09119028793182224] |
708.3015 | Decreasing elliptic flow at the LHC: Calculations in a parton
recombination approach | We apply the parton recombination approach to study the energy dependence of
the elliptic flow, v_2 in heavy ion collisions from AGS to LHC energies. The
relevant input quantities ($T, \mu_B, \eta_T$) at the various center of mass
energies are obtained from fits to the available data. The model yields a good
description of the integrated v_2 data for charged particles at midrapidity
from AGS to RHIC energies. In stark contrast to the current expectations, we
observe a decrease of the integrated v_2 values above the highest RHIC energy.
Thus, we predict a decrease of v_2 at LHC energies compared to the RHIC
results. This drop is attributed to negative v_2 values for the underlying
parton distributions at low to moderate transverse momenta that develops if the
transverse flow velocity is high enough. At energies above the LHC regime, the
present approach predicts even negative values for the integrated v_2.
| nucl-th | we apply the parton recombination approach to study the energy dependence of the elliptic flow v_2 in heavy ion collisions from ags to lhc energies the relevant input quantities t mu_b eta_t at the various center of mass energies are obtained from fits to the available data the model yields a good description of the integrated v_2 data for charged particles at midrapidity from ags to rhic energies in stark contrast to the current expectations we observe a decrease of the integrated v_2 values above the highest rhic energy thus we predict a decrease of v_2 at lhc energies compared to the rhic results this drop is attributed to negative v_2 values for the underlying parton distributions at low to moderate transverse momenta that develops if the transverse flow velocity is high enough at energies above the lhc regime the present approach predicts even negative values for the integrated v_2 | [['we', 'apply', 'the', 'parton', 'recombination', 'approach', 'to', 'study', 'the', 'energy', 'dependence', 'of', 'the', 'elliptic', 'flow', 'v_2', 'in', 'heavy', 'ion', 'collisions', 'from', 'ags', 'to', 'lhc', 'energies', 'the', 'relevant', 'input', 'quantities', 't', 'mu_b', 'eta_t', 'at', 'the', 'various', 'center', 'of', 'mass', 'energies', 'are', 'obtained', 'from', 'fits', 'to', 'the', 'available', 'data', 'the', 'model', 'yields', 'a', 'good', 'description', 'of', 'the', 'integrated', 'v_2', 'data', 'for', 'charged', 'particles', 'at', 'midrapidity', 'from', 'ags', 'to', 'rhic', 'energies', 'in', 'stark', 'contrast', 'to', 'the', 'current', 'expectations', 'we', 'observe', 'a', 'decrease', 'of', 'the', 'integrated', 'v_2', 'values', 'above', 'the', 'highest', 'rhic', 'energy', 'thus', 'we', 'predict', 'a', 'decrease', 'of', 'v_2', 'at', 'lhc', 'energies', 'compared', 'to', 'the', 'rhic', 'results', 'this', 'drop', 'is', 'attributed', 'to', 'negative', 'v_2', 'values', 'for', 'the', 'underlying', 'parton', 'distributions', 'at', 'low', 'to', 'moderate', 'transverse', 'momenta', 'that', 'develops', 'if', 'the', 'transverse', 'flow', 'velocity', 'is', 'high', 'enough', 'at', 'energies', 'above', 'the', 'lhc', 'regime', 'the', 'present', 'approach', 'predicts', 'even', 'negative', 'values', 'for', 'the', 'integrated', 'v_2']] | [-0.035898322728462516, 0.23726769958622754, -0.1552831554443886, 0.13050417514905954, 0.004780183240460853, -0.10630320778116584, -0.0765888227429241, 0.378006184771657, -0.2433169646343837, -0.3015215555050721, -0.06479333096959938, -0.38516309260701137, 0.1284278710046783, 0.17953032398596405, 0.05783578022072713, 0.0764519951720528, 0.14046797136000047, 0.03692537057989587, -0.06243980543067058, -0.1739341186483701, 0.2696077853169603, 0.12046703054977115, 0.2734211429922531, 0.1971424388582818, 0.09687531694304198, 0.023840068209295472, 0.04747925422775249, 0.03799721838440746, -0.18341654125974552, 0.09994791755316934, 0.30573974361332756, -0.02671692391857505, 0.16107848472117137, -0.3175117666895191, -0.12248677326599136, 0.12343091144536933, 0.09949646285269409, 0.13915749498953423, -0.05621289642527699, -0.16944375449170668, 0.11009347084599237, -0.21312174669001252, -0.16572729686197515, -0.04672039141102383, -0.013253138891110818, 0.024520968613214792, -0.32072927633610865, 0.16761729763199887, -0.03918827047881981, 0.052174603156745436, -0.06495942133013159, -0.2308255830228639, -0.11414819416978086, 0.013532935831074913, 0.11317708844862258, 0.09289954703534022, 0.16526131719040374, -0.1768971949412177, -0.11549717175929497, 0.37363858928903937, -0.010673999103407066, -0.09294421595521271, 0.17513168569654225, -0.24930653447285295, -0.11123514148717126, 0.21024189285623532, 0.2709154068197434, 0.06285943212918937, -0.13046788895813127, 0.03842719559421918, 5.306032796700795e-05, 0.1574376307301039, 0.085736256170397, -0.007778435194243987, 0.17472071007514994, 0.14581794672335188, 0.037330611137052376, 0.0665632656031327, -0.10189055304663877, -0.059461263028594356, -0.3895998044125736, -0.055157541253914436, -0.1393664622772485, 0.03259070491418242, -0.09015344415791332, -0.04456157394995292, 0.38562168550367154, 0.16707413673556099, 0.36173795236895484, 0.04721950814127922, 0.3043904072418809, 0.15497612772509456, 0.07086374036346872, 0.12440218267031014, 0.2800185724076194, 0.12827412112926442, 0.26838662924245, -0.2632817234735315, 0.03663448572934916, 0.056592666199430826] |
708.3016 | Star and Planet Formation with ALMA: an Overview | Submillimeter observations with ALMA will be the essential next step in our
understanding of how stars and planets form. Key projects range from detailed
imaging of the collapse of pre-stellar cores and measuring the accretion rate
of matter onto deeply embedded protostars, to unravelling the chemistry and
dynamics of high-mass star-forming clusters and high-spatial resolution studies
of protoplanetary disks down to the 1 AU scale.
| astro-ph | submillimeter observations with alma will be the essential next step in our understanding of how stars and planets form key projects range from detailed imaging of the collapse of prestellar cores and measuring the accretion rate of matter onto deeply embedded protostars to unravelling the chemistry and dynamics of highmass starforming clusters and highspatial resolution studies of protoplanetary disks down to the 1 au scale | [['submillimeter', 'observations', 'with', 'alma', 'will', 'be', 'the', 'essential', 'next', 'step', 'in', 'our', 'understanding', 'of', 'how', 'stars', 'and', 'planets', 'form', 'key', 'projects', 'range', 'from', 'detailed', 'imaging', 'of', 'the', 'collapse', 'of', 'prestellar', 'cores', 'and', 'measuring', 'the', 'accretion', 'rate', 'of', 'matter', 'onto', 'deeply', 'embedded', 'protostars', 'to', 'unravelling', 'the', 'chemistry', 'and', 'dynamics', 'of', 'highmass', 'starforming', 'clusters', 'and', 'highspatial', 'resolution', 'studies', 'of', 'protoplanetary', 'disks', 'down', 'to', 'the', '1', 'au', 'scale']] | [-0.03770111434591504, 0.1247528807976498, -0.06089492090619528, 0.04996129977875031, -0.07606251316789825, 0.008051588174958641, 0.011691956623242452, 0.3868522482422682, -0.1811816857411311, -0.35592085959819647, 0.0896719958113793, -0.21926358036267068, -0.024466241792274208, 0.13969944932569678, 0.03462794506205962, 0.025143171588961895, 0.13677005240192208, -0.19778393615896886, -0.009498091987692393, -0.23589863109474, 0.36029050949817665, 0.12814605155816444, 0.05660961419343948, -0.010648695114426888, 0.02449761337529008, -0.20078162930261056, -0.0729807246189851, -0.10214733121773371, -0.2429081101113787, 0.06967955025790545, 0.32225943299440235, 0.17847262160995833, 0.2580511552389138, -0.46334561817348, -0.21966718620298287, 0.018995513967596567, 0.2334808574273036, 0.0075004559583388844, -0.030920279427216604, -0.29324413848181186, 0.08172400666830631, -0.11434151090036791, -0.18032776885307752, 0.03252055220879041, 0.04630221859551966, 0.02676938558713748, -0.1946691976573605, 0.076868009662184, 0.04693581526382611, 0.06866840526748162, -0.1284142520278692, -0.0983884540744699, -0.05004615783333205, 0.14542300205570288, -0.033119114029866, 0.1014359164911394, 0.2821006389764639, -0.21783801239843553, -0.02696107177851865, 0.4138560782294147, -0.051555179877994725, -0.026958879455924033, 0.29964944021059914, -0.3022005242313473, -0.23177657285705208, 0.15815786202079973, 0.1887797337455245, 0.1664857251712909, -0.11179803125560284, -0.029964781548971166, 0.016264719430070657, 0.2571181953813021, 0.06653908237438792, 0.09517894693865225, 0.43274545211058396, 0.23879351668919507, -0.008674970116967766, 0.11269259195452412, -0.24044643230736257, -0.1253029533303701, -0.20470042405650019, -0.2156474579555484, -0.16858723407181408, 0.12708860956347331, -0.13278402514093054, -0.053778070068130124, 0.28227558119867285, 0.1159453840353168, 0.1828397149238019, 0.02953220958678195, 0.31458577281580524, 0.009401150572543534, 0.1473416329289858, 0.07785317238706808, 0.24468192152965526, 0.1976833594819674, 0.14544523958689892, -0.26124421655773544, 0.045918725491859595, -0.041257864745477074] |
708.3017 | Black Holes and Quantum Gravity at the LHC | We argue that the highly studied black hole signatures based on thermal
multiparticle final states are very unlikely and only occur in a very limited
parameter regime if at all. However, we show that if the higher-dimensional
quantum gravity scale is low, it should be possible to study quantum gravity in
the context of higher dimensions through detailed compositeness-type searches.
| hep-ph | we argue that the highly studied black hole signatures based on thermal multiparticle final states are very unlikely and only occur in a very limited parameter regime if at all however we show that if the higherdimensional quantum gravity scale is low it should be possible to study quantum gravity in the context of higher dimensions through detailed compositenesstype searches | [['we', 'argue', 'that', 'the', 'highly', 'studied', 'black', 'hole', 'signatures', 'based', 'on', 'thermal', 'multiparticle', 'final', 'states', 'are', 'very', 'unlikely', 'and', 'only', 'occur', 'in', 'a', 'very', 'limited', 'parameter', 'regime', 'if', 'at', 'all', 'however', 'we', 'show', 'that', 'if', 'the', 'higherdimensional', 'quantum', 'gravity', 'scale', 'is', 'low', 'it', 'should', 'be', 'possible', 'to', 'study', 'quantum', 'gravity', 'in', 'the', 'context', 'of', 'higher', 'dimensions', 'through', 'detailed', 'compositenesstype', 'searches']] | [-0.1225861722319308, 0.2185117740941755, -0.0769823322435683, 0.14135007292103274, -0.0543376977152933, -0.1904269184056922, 0.007014720471796848, 0.33080295968990203, -0.1926857911808006, -0.27874837291695304, 0.11571381640052265, -0.2466186021407277, -0.15682339852959928, 0.2286652350735109, -0.029165390594783475, -0.0016008546828465947, 0.08345342163880498, 0.030690658269292216, -0.059097443226827466, -0.24595289964670852, 0.3343140999273539, 0.10289439544381605, 0.24132681589068497, 0.08828450974582111, 0.07058637885976646, -0.030885970551457444, 0.02455440392102099, 0.08574885265680693, -0.11343822753874751, 0.011300485828788794, 0.26332576937531516, 0.07603277603038035, 0.21934332993765504, -0.44144134624403414, -0.2393851939557215, 0.10891624999437798, 0.1405069121885729, 0.18217373980303941, -0.0767919017037503, -0.2427665349253911, 0.1335623851085429, -0.19210449331518958, -0.09851770844878786, -0.10243206654312247, 0.04332087044525197, -0.10564315509864018, -0.18437449067389056, 0.09308160477420473, 0.035118952851300525, -0.036018719549401335, -0.005650457097375292, -0.04265625080314733, -0.05264548733988303, 0.06736281574151273, 0.04769786285883668, -0.01405625501095112, 0.14562853763542943, -0.16785862475191637, -0.10357397854706998, 0.4056875053161787, -0.059818686948994455, -0.1948705023959658, 0.267255806083933, -0.26577471618114384, -0.19895982470016105, 0.0933835699964883, 0.14297502330737188, 0.18220292836806531, -0.12688533268805782, 0.10821924336852458, -0.0006437107162960505, 0.19404225297651048, 0.054646414507306736, 0.13279554765213722, 0.3182732065808091, 0.1303677376580693, 0.03308472231472448, 0.11508571629420365, -0.08618344718164181, -0.10544200261001144, -0.31704074078065864, -0.12574764858868162, -0.19339857869426388, 0.063425782247115, -0.06365408924367807, -0.13538235986321154, 0.30099019938606325, 0.17317087926223115, 0.20412059177218353, -0.009833399822019924, 0.2384777053622371, 0.11386766390464569, 0.04519405587718396, 0.09754060327975174, 0.3407004233686474, 0.07730171808941384, 0.07014832133427262, -0.21015489609691046, 0.02114238979894731, 0.010970473194778976] |
708.3018 | Multiphase Plasma in Sub-Damped Lyman Alpha Systems: A Hidden Metal
Reservoir | We present a VLT/UVES spectrum of a proximate sub-damped Lyman-alpha
(sub-DLA) system at z=2.65618 toward the quasar Q0331-4505
(z_qso=2.6785+/-0.0030). Absorption lines of O I, Si II, Si III, Si IV, C II, C
III, C IV, Fe II, Al II, and O VI are seen in the sub-DLA, which has a neutral
hydrogen column density log N(H I)=19.82+/-0.05. The absorber is at a velocity
of 1820+/-250 km/s from the quasar; however, its low metallicity
[O/H]=-1.64+/-0.07, lack of partial coverage, lack of temporal variations
between observations taken in 2003 and 2006, and non-detection of N V imply the
absorber is not a genuine intrinsic system. By measuring the O VI column
density and assuming equal metallicities in the neutral and ionized gas, we
determine the column density of hot ionized hydrogen in this sub-DLA, and in
two other sub-DLAs with O VI drawn from the literature. Coupling this with
determinations of the typical amount of warm ionized hydrogen in sub-DLAs, we
confirm that sub-DLAs are a more important metal reservoir than DLAs, in total
comprising at least 6-22% of the metal budget at z~2.5.
| astro-ph | we present a vltuves spectrum of a proximate subdamped lymanalpha subdla system at z265618 toward the quasar q03314505 z_qso2678500030 absorption lines of o i si ii si iii si iv c ii c iii c iv fe ii al ii and o vi are seen in the subdla which has a neutral hydrogen column density log nh i1982005 the absorber is at a velocity of 1820250 kms from the quasar however its low metallicity oh164007 lack of partial coverage lack of temporal variations between observations taken in 2003 and 2006 and nondetection of n v imply the absorber is not a genuine intrinsic system by measuring the o vi column density and assuming equal metallicities in the neutral and ionized gas we determine the column density of hot ionized hydrogen in this subdla and in two other subdlas with o vi drawn from the literature coupling this with determinations of the typical amount of warm ionized hydrogen in subdlas we confirm that subdlas are a more important metal reservoir than dlas in total comprising at least 622 of the metal budget at z25 | [['we', 'present', 'a', 'vltuves', 'spectrum', 'of', 'a', 'proximate', 'subdamped', 'lymanalpha', 'subdla', 'system', 'at', 'z265618', 'toward', 'the', 'quasar', 'q03314505', 'z_qso2678500030', 'absorption', 'lines', 'of', 'o', 'i', 'si', 'ii', 'si', 'iii', 'si', 'iv', 'c', 'ii', 'c', 'iii', 'c', 'iv', 'fe', 'ii', 'al', 'ii', 'and', 'o', 'vi', 'are', 'seen', 'in', 'the', 'subdla', 'which', 'has', 'a', 'neutral', 'hydrogen', 'column', 'density', 'log', 'nh', 'i1982005', 'the', 'absorber', 'is', 'at', 'a', 'velocity', 'of', '1820250', 'kms', 'from', 'the', 'quasar', 'however', 'its', 'low', 'metallicity', 'oh164007', 'lack', 'of', 'partial', 'coverage', 'lack', 'of', 'temporal', 'variations', 'between', 'observations', 'taken', 'in', '2003', 'and', '2006', 'and', 'nondetection', 'of', 'n', 'v', 'imply', 'the', 'absorber', 'is', 'not', 'a', 'genuine', 'intrinsic', 'system', 'by', 'measuring', 'the', 'o', 'vi', 'column', 'density', 'and', 'assuming', 'equal', 'metallicities', 'in', 'the', 'neutral', 'and', 'ionized', 'gas', 'we', 'determine', 'the', 'column', 'density', 'of', 'hot', 'ionized', 'hydrogen', 'in', 'this', 'subdla', 'and', 'in', 'two', 'other', 'subdlas', 'with', 'o', 'vi', 'drawn', 'from', 'the', 'literature', 'coupling', 'this', 'with', 'determinations', 'of', 'the', 'typical', 'amount', 'of', 'warm', 'ionized', 'hydrogen', 'in', 'subdlas', 'we', 'confirm', 'that', 'subdlas', 'are', 'a', 'more', 'important', 'metal', 'reservoir', 'than', 'dlas', 'in', 'total', 'comprising', 'at', 'least', '622', 'of', 'the', 'metal', 'budget', 'at', 'z25']] | [-0.03704530173500915, 0.07505676887487456, 0.0899390757062846, -0.01768031401696515, 0.01818321955832258, -0.19102441142497342, 0.09735041624592818, 0.4471812596765615, -0.12616285213235093, -0.3202141838011432, -0.011463638137904979, -0.36025522966832346, 0.0249143938947006, 0.07450417235840932, 0.009681878151045849, -0.06841599006543862, -0.03571828326610269, -0.14098382016412367, -0.05798927129846129, -0.2647937415825403, 0.2787965632590997, 0.04039765379817809, 0.17330393270131642, -0.004760876945141009, 0.04902403549643728, -0.13030856509764, -0.11451858219606434, 0.04563658592938367, -0.11492253573353062, 0.1016847790629303, 0.2621795244009818, 0.16257108005219517, 0.2420804854087784, -0.3260508606757569, -0.17337128260839826, 0.018484067408588982, 0.17647156640124312, 0.09201818593122633, -0.0472527689707109, -0.25060751529852465, 0.0013558108893638782, -0.1477163746600476, -0.17040809992264094, 0.14464930968331488, 0.11731356644836806, 0.051622682430592, -0.21591107879560126, 0.13908539778726586, -0.009829686165361081, 0.13682518832485513, -0.043320245672994695, -0.15385601768075452, -0.1546886153203451, -0.0307137487682456, -0.07571536362813101, -0.017105441871967355, 0.17660962226721694, -0.1244419057364181, 0.06100216619723008, 0.4320492590593416, -0.17079589539248624, 0.05553831473140225, 0.2577342020958073, -0.21183543220046633, -0.212213657070267, 0.2381204327944624, 0.1197701824255456, 0.09202754521797711, -0.09443753587060981, 0.08402985908399536, -0.07203826420259067, 0.24638161242092396, 0.009494551183855802, 0.08832976858310486, 0.26225915475416994, 0.03248312760744307, 0.0459863903450827, -0.02337839849632612, -0.21277567362912672, 0.03430996700893761, -0.2641003340583671, -0.22714251295879145, -0.102942605692325, 0.11725205338915538, -0.10846049829398013, -0.14973159366856872, 0.2859167025903356, 0.12756672010120362, 0.2858143154805326, -0.0069429508672164235, 0.2855552496614808, 0.1643629418817575, 0.00694917845026732, 0.11764222051616821, 0.2656267346435432, 0.21290351454258008, 0.1493285831135019, -0.25486960437538175, 0.14550614093119899, 0.0371061134412569] |
708.3019 | Single-Symbol ML Decodable Distributed STBCs for Partially-Coherent
Cooperative Networks | Space-time block codes (STBCs) that are single-symbol decodable (SSD) in a
co-located multiple antenna setting need not be SSD in a distributed
cooperative communication setting. A relay network with N relays and a single
source-destination pair is called a partially-coherent relay channel (PCRC) if
the destination has perfect channel state information (CSI) of all the channels
and the relays have only the phase information of the source-to-relay channels.
In this paper, first, a new set of necessary and sufficient conditions for a
STBC to be SSD for co-located multiple antenna communication is obtained. Then,
this is extended to a set of necessary and sufficient conditions for a
distributed STBC (DSTBC) to be SSD for a PCRC, by identifying the additional
conditions. Using this, several SSD DSTBCs for PCRC are identified among the
known classes of STBCs. It is proved that even if a SSD STBC for a co-located
MIMO channel does not satisfy the additional conditions for the code to be SSD
for a PCRC, single-symbol decoding of it in a PCRC gives full-diversity and
only coding gain is lost. It is shown that when a DSTBC is SSD for a PCRC, then
arbitrary coordinate interleaving of the in-phase and quadrature-phase
components of the variables does not disturb its SSD property for PCRC.
Finally, it is shown that the possibility of {\em channel phase compensation}
operation at the relay nodes using partial CSI at the relays increases the
possible rate of SSD DSTBCs from $\frac{2}{N}$ when the relays do not have CSI
to 1/2, which is independent of N.
| cs.IT math.IT | spacetime block codes stbcs that are singlesymbol decodable ssd in a colocated multiple antenna setting need not be ssd in a distributed cooperative communication setting a relay network with n relays and a single sourcedestination pair is called a partiallycoherent relay channel pcrc if the destination has perfect channel state information csi of all the channels and the relays have only the phase information of the sourcetorelay channels in this paper first a new set of necessary and sufficient conditions for a stbc to be ssd for colocated multiple antenna communication is obtained then this is extended to a set of necessary and sufficient conditions for a distributed stbc dstbc to be ssd for a pcrc by identifying the additional conditions using this several ssd dstbcs for pcrc are identified among the known classes of stbcs it is proved that even if a ssd stbc for a colocated mimo channel does not satisfy the additional conditions for the code to be ssd for a pcrc singlesymbol decoding of it in a pcrc gives fulldiversity and only coding gain is lost it is shown that when a dstbc is ssd for a pcrc then arbitrary coordinate interleaving of the inphase and quadraturephase components of the variables does not disturb its ssd property for pcrc finally it is shown that the possibility of em channel phase compensation operation at the relay nodes using partial csi at the relays increases the possible rate of ssd dstbcs from frac2n when the relays do not have csi to 12 which is independent of n | [['spacetime', 'block', 'codes', 'stbcs', 'that', 'are', 'singlesymbol', 'decodable', 'ssd', 'in', 'a', 'colocated', 'multiple', 'antenna', 'setting', 'need', 'not', 'be', 'ssd', 'in', 'a', 'distributed', 'cooperative', 'communication', 'setting', 'a', 'relay', 'network', 'with', 'n', 'relays', 'and', 'a', 'single', 'sourcedestination', 'pair', 'is', 'called', 'a', 'partiallycoherent', 'relay', 'channel', 'pcrc', 'if', 'the', 'destination', 'has', 'perfect', 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708.302 | The short period end of the contact binary period distribution based on
the All Sky Automated Survey (ASAS) | The search-volume corrected period distribution of contact binaries of the W
UMa type appears to reflect primarily the constant number ratio of ~1/500 to
the number of stars along the Main Sequence; there exist no evidence for
angular momentum evolution. The maximum in contact binary numbers is located at
shorter periods than estimated before, P ~ 0.27 d. The drop in numbers towards
the cut-off at P ~ 0.215 - 0.22 d still suffers from the small number
statistics while the cut-off itself remains unexplained. Only one out of seven
short-period ASAS variables with P<0.22 d have been retained in the sample
considered here within 8 < V < 13; this short-period field-sky record holder at
P=0.2178 d should be studied.
| astro-ph | the searchvolume corrected period distribution of contact binaries of the w uma type appears to reflect primarily the constant number ratio of 1500 to the number of stars along the main sequence there exist no evidence for angular momentum evolution the maximum in contact binary numbers is located at shorter periods than estimated before p 027 d the drop in numbers towards the cutoff at p 0215 022 d still suffers from the small number statistics while the cutoff itself remains unexplained only one out of seven shortperiod asas variables with p022 d have been retained in the sample considered here within 8 v 13 this shortperiod fieldsky record holder at p02178 d should be studied | [['the', 'searchvolume', 'corrected', 'period', 'distribution', 'of', 'contact', 'binaries', 'of', 'the', 'w', 'uma', 'type', 'appears', 'to', 'reflect', 'primarily', 'the', 'constant', 'number', 'ratio', 'of', '1500', 'to', 'the', 'number', 'of', 'stars', 'along', 'the', 'main', 'sequence', 'there', 'exist', 'no', 'evidence', 'for', 'angular', 'momentum', 'evolution', 'the', 'maximum', 'in', 'contact', 'binary', 'numbers', 'is', 'located', 'at', 'shorter', 'periods', 'than', 'estimated', 'before', 'p', '027', 'd', 'the', 'drop', 'in', 'numbers', 'towards', 'the', 'cutoff', 'at', 'p', '0215', '022', 'd', 'still', 'suffers', 'from', 'the', 'small', 'number', 'statistics', 'while', 'the', 'cutoff', 'itself', 'remains', 'unexplained', 'only', 'one', 'out', 'of', 'seven', 'shortperiod', 'asas', 'variables', 'with', 'p022', 'd', 'have', 'been', 'retained', 'in', 'the', 'sample', 'considered', 'here', 'within', '8', 'v', '13', 'this', 'shortperiod', 'fieldsky', 'record', 'holder', 'at', 'p02178', 'd', 'should', 'be', 'studied']] | [-0.19291626495531702, 0.1970069876632991, -0.058516026826872104, 0.06792802220226916, -0.030426815275795164, -0.16239871590736166, 0.1013165361487999, 0.3420729565277564, -0.23784354540923264, -0.377952441573143, 0.04949197552344078, -0.311405767959932, -0.0031042526377183673, 0.18481022336899378, -0.04605779855917282, -5.053304263547195e-05, 0.07446613438083353, 0.05401004348321101, -0.04737581248988554, -0.2683890250766963, 0.24781421938317671, 0.011493681301053745, 0.16128960376259235, -0.04093709757007592, 0.031833515101755284, 0.0034396966066277397, -0.04899244484892403, -0.032815453793185935, -0.1444505747959875, -0.004431329893702394, 0.21384592382319734, 0.061165764505472196, 0.2709937313019372, -0.3012507005253538, -0.16077963327906564, 0.09992677960194549, 0.1781145921770269, 0.02412472709609542, 0.009926731491139967, -0.1654928294855244, 0.1253756446046837, -0.14506354481208475, -0.2096461123102798, 0.06862930106697089, 0.18276892295436917, -0.007836543469158191, -0.18360060593937483, 0.1346990654824005, 0.05053154157837276, 0.11865905460291666, -0.062307597599528, -0.23497595794630788, -0.0703316718974538, 0.05884052163187777, 0.07474451032013887, 0.11112407881836613, 0.07589876831847087, -0.055077909877260044, -0.01651629153639078, 0.3459483092172747, -0.06415873788468708, -0.09379292206129933, 0.18801857393638816, -0.23269402444057694, -0.15190097761512486, 0.22069202361636656, 0.13858415122067688, 0.11791488550401466, -0.12963719425755924, 0.0342401234470143, 0.013108688806373198, 0.22782867954450503, 0.14420914634510018, 0.05489707807031567, 0.2627822256902546, 0.11698026714879459, -0.009148933774321875, 0.0640157523793704, -0.19200298313743772, -0.050112668902868716, -0.28483198650914815, -0.06749280420156707, -0.19066659691104815, 0.10084132463630058, -0.10245139246849772, -0.10532662859268949, 0.29970036914357834, 0.06741756840765609, 0.24349507821550742, 0.04225065595618721, 0.20186003174764655, 0.09021622173702426, 0.09976115199055757, 0.11503172022974596, 0.2964634223948274, 0.13824303817432537, 0.11354858882671667, -0.20067581074442137, 0.12919487488925852, -0.0014522359152715984] |
708.3021 | Discovery of VHE gamma-rays from the distant BL Lac 1ES 0347-121 | Aims: Our aim is to study the production mechanism for very-high-energy (VHE;
>100GeV) gamma-rays in distant active galactic nuclei (AGN) and use the
observed VHE spectrum to derive limits on the Extragalactic Background Light
(EBL). We also want to determine physical quantities through the modeling of
the object's broad-band spectral energy distribution (SED). Methods: VHE
observations (~25h live time) of the BL Lac 1ES 0347-121 (redshift z=0.188)
were conducted with the High Energy Stereoscopic System (H.E.S.S.) between
August and December 2006. Contemporaneous X-ray and UV/optical observations
from the SWIFT satellite are used to interpret the SED of the source in terms
of a synchrotron self Compton (SSC) model. Results: An excess of 327 events,
corresponding to a statistical significance of 10.1 standard deviations, is
detected from 1ES 0347-121. Its photon spectrum, ranging from ~250GeV to ~3TeV,
is well described by a power law with a photon index of Gamma = 3.10 +/-
0.23_stat +/- 0.10_sys. The integral flux above 250GeV corresponds to ~2% of
the flux of the Crab Nebula above the same threshold. No VHE flux variability
is detected within the data set. Conclusions: Constraints on the EBL density at
optical to near-infrared wavelengths derived from the photon spectrum of 1ES
0347-121 are close to the strongest limits derived previously. The strong EBL
limits confirm earlier findings, that the EBL density in the near-infrared is
close to the lower limits from source counts. This implies that the universe is
more transparent to VHE gamma-rays than previously believed. An SSC model
provides a reasonable description of the contemporaneous SED.
| astro-ph | aims our aim is to study the production mechanism for veryhighenergy vhe 100gev gammarays in distant active galactic nuclei agn and use the observed vhe spectrum to derive limits on the extragalactic background light ebl we also want to determine physical quantities through the modeling of the objects broadband spectral energy distribution sed methods vhe observations 25h live time of the bl lac 1es 0347121 redshift z0188 were conducted with the high energy stereoscopic system hess between august and december 2006 contemporaneous xray and uvoptical observations from the swift satellite are used to interpret the sed of the source in terms of a synchrotron self compton ssc model results an excess of 327 events corresponding to a statistical significance of 101 standard deviations is detected from 1es 0347121 its photon spectrum ranging from 250gev to 3tev is well described by a power law with a photon index of gamma 310 023_stat 010_sys the integral flux above 250gev corresponds to 2 of the flux of the crab nebula above the same threshold no vhe flux variability is detected within the data set conclusions constraints on the ebl density at optical to nearinfrared wavelengths derived from the photon spectrum of 1es 0347121 are close to the strongest limits derived previously the strong ebl limits confirm earlier findings that the ebl density in the nearinfrared is close to the lower limits from source counts this implies that the universe is more transparent to vhe gammarays than previously believed an ssc model provides a reasonable description of the contemporaneous sed | [['aims', 'our', 'aim', 'is', 'to', 'study', 'the', 'production', 'mechanism', 'for', 'veryhighenergy', 'vhe', '100gev', 'gammarays', 'in', 'distant', 'active', 'galactic', 'nuclei', 'agn', 'and', 'use', 'the', 'observed', 'vhe', 'spectrum', 'to', 'derive', 'limits', 'on', 'the', 'extragalactic', 'background', 'light', 'ebl', 'we', 'also', 'want', 'to', 'determine', 'physical', 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708.3022 | Efficient FPGA-based multipliers for F_{3^97} and F_{3^{6*97}} | In this work we present a new structure for multiplication in finite fields.
This structure is based on a digit-level LFSR (Linear Feedback Shift Register)
multiplier in which the area of digit-multipliers are reduced using the
Karatsuba method. We compare our results with the other works in the literature
for F_{3^97}. We also propose new formulas for multiplication in F_{3^{6*97}}.
These new formulas reduce the number of F_{3^97}-multiplications from 18 to 15.
The fields F_{3^{97}} and F_{3^{6*97}} are relevant in the context of
pairing-based cryptography.
| cs.CR | in this work we present a new structure for multiplication in finite fields this structure is based on a digitlevel lfsr linear feedback shift register multiplier in which the area of digitmultipliers are reduced using the karatsuba method we compare our results with the other works in the literature for f_397 we also propose new formulas for multiplication in f_3697 these new formulas reduce the number of f_397multiplications from 18 to 15 the fields f_397 and f_3697 are relevant in the context of pairingbased cryptography | [['in', 'this', 'work', 'we', 'present', 'a', 'new', 'structure', 'for', 'multiplication', 'in', 'finite', 'fields', 'this', 'structure', 'is', 'based', 'on', 'a', 'digitlevel', 'lfsr', 'linear', 'feedback', 'shift', 'register', 'multiplier', 'in', 'which', 'the', 'area', 'of', 'digitmultipliers', 'are', 'reduced', 'using', 'the', 'karatsuba', 'method', 'we', 'compare', 'our', 'results', 'with', 'the', 'other', 'works', 'in', 'the', 'literature', 'for', 'f_397', 'we', 'also', 'propose', 'new', 'formulas', 'for', 'multiplication', 'in', 'f_3697', 'these', 'new', 'formulas', 'reduce', 'the', 'number', 'of', 'f_397multiplications', 'from', '18', 'to', '15', 'the', 'fields', 'f_397', 'and', 'f_3697', 'are', 'relevant', 'in', 'the', 'context', 'of', 'pairingbased', 'cryptography']] | [-0.0846891851117245, 0.08149193714761847, -0.06073745708511789, 0.035283363338772064, -0.07470649624644202, -0.09810863080422712, 0.05156203654382519, 0.3690097347562072, -0.2697836551048993, -0.29933551019882854, 0.12377638686625168, -0.23125703608627501, -0.17891181429517986, 0.29206452371340386, -0.11485257982151123, 0.04818573530433299, -0.014433395149940742, 0.03916958912535087, -0.1059554081139025, -0.26916503636873784, 0.3463396934815977, 0.026064718542974208, 0.2532938583341392, 0.028082574540867083, 0.05356322623836466, -0.00570905310561574, -0.07322290874546088, 0.0034902766361667573, -0.09283944924473998, 0.18436986793870036, 0.23871872765955196, 0.1317018972933764, 0.24522603263701254, -0.417146743404903, -0.17155722579388302, 0.056135492069245896, 0.11492910602165363, 0.15518883656256513, -0.13412036608368205, -0.2187191633436876, 0.11478553972902554, -0.18677000704964128, -0.060228851777088796, -0.08692910931297118, 0.0033632288274319864, 0.06090789147361371, -0.25082601863991094, 0.03688318552589339, 0.053105510043310405, 0.07263564027232837, -0.06676533538848162, -0.14456900928310956, 0.09911723196494711, 0.1220396059577035, -0.02960679629711505, 0.0022301807516266273, 0.06416402022130316, -0.12011400524739034, -0.15160008466837904, 0.3375940272419513, -0.08171105607636744, -0.21142835181819486, 0.1393572169185109, -0.12915590221557435, -0.18633598101301754, 0.08529361899753538, 0.18878712296438746, 0.1556149868271019, -0.11749331406877624, 0.10616836090840376, -0.07288181196744967, 0.14744114093600383, 0.0476121087617512, 0.024819965114746288, 0.09864913900913316, 0.1359130198230283, 0.05803316516825293, 0.1754019694687221, -0.086360380710751, -0.09646979897117973, -0.3151995210165653, -0.18177643713034405, -0.13586376719412546, -0.0005683065215243569, -0.054519693814976955, -0.1363940149828603, 0.4196845603092939, 0.19610419666653947, 0.21377216505853436, 0.0628772719388922, 0.3068535619804376, 0.12484534944354592, 0.12748796919572958, 0.07137325813380789, 0.212707291984241, 0.1370883329028759, 0.10248824775431163, -0.17605658409869462, 0.013897884336500606, 0.08884725420252432] |
708.3023 | Fine frequency shift of sigle vortex entrance and exit in
superconducting loops | The heat capacity $C_{p}$ of an array of independent aluminum rings has been
measured under an external magnetic field $\vec{H}$ using highly sensitive
ac-calorimetry based on a silicon membrane sensor. Each superconducting vortex
entrance induces a phase transition and a heat capacity jump and hence $C_{p}$
oscillates with $\vec{H}$. This oscillatory and non-stationary behaviour
measured versus the magnetic field has been studied using the Wigner-Ville
distribution (a time-frequency representation). It is found that the
periodicity of the heat capacity oscillations varies significantly with the
magnetic field; the evolution of the period also depends on the sweeping
direction of the field. This can be attributed to a different behavior between
expulsion and penetration of vortices into the rings. A variation of more than
15% of the periodicity of the heat capacity jumps is observed as the magnetic
field is varied. A description of this phenomenon is given using an analytical
solution of the Ginzburg-Landau equations of superconductivity.
| cond-mat.mes-hall | the heat capacity c_p of an array of independent aluminum rings has been measured under an external magnetic field vech using highly sensitive accalorimetry based on a silicon membrane sensor each superconducting vortex entrance induces a phase transition and a heat capacity jump and hence c_p oscillates with vech this oscillatory and nonstationary behaviour measured versus the magnetic field has been studied using the wignerville distribution a timefrequency representation it is found that the periodicity of the heat capacity oscillations varies significantly with the magnetic field the evolution of the period also depends on the sweeping direction of the field this can be attributed to a different behavior between expulsion and penetration of vortices into the rings a variation of more than 15 of the periodicity of the heat capacity jumps is observed as the magnetic field is varied a description of this phenomenon is given using an analytical solution of the ginzburglandau equations of superconductivity | [['the', 'heat', 'capacity', 'c_p', 'of', 'an', 'array', 'of', 'independent', 'aluminum', 'rings', 'has', 'been', 'measured', 'under', 'an', 'external', 'magnetic', 'field', 'vech', 'using', 'highly', 'sensitive', 'accalorimetry', 'based', 'on', 'a', 'silicon', 'membrane', 'sensor', 'each', 'superconducting', 'vortex', 'entrance', 'induces', 'a', 'phase', 'transition', 'and', 'a', 'heat', 'capacity', 'jump', 'and', 'hence', 'c_p', 'oscillates', 'with', 'vech', 'this', 'oscillatory', 'and', 'nonstationary', 'behaviour', 'measured', 'versus', 'the', 'magnetic', 'field', 'has', 'been', 'studied', 'using', 'the', 'wignerville', 'distribution', 'a', 'timefrequency', 'representation', 'it', 'is', 'found', 'that', 'the', 'periodicity', 'of', 'the', 'heat', 'capacity', 'oscillations', 'varies', 'significantly', 'with', 'the', 'magnetic', 'field', 'the', 'evolution', 'of', 'the', 'period', 'also', 'depends', 'on', 'the', 'sweeping', 'direction', 'of', 'the', 'field', 'this', 'can', 'be', 'attributed', 'to', 'a', 'different', 'behavior', 'between', 'expulsion', 'and', 'penetration', 'of', 'vortices', 'into', 'the', 'rings', 'a', 'variation', 'of', 'more', 'than', '15', 'of', 'the', 'periodicity', 'of', 'the', 'heat', 'capacity', 'jumps', 'is', 'observed', 'as', 'the', 'magnetic', 'field', 'is', 'varied', 'a', 'description', 'of', 'this', 'phenomenon', 'is', 'given', 'using', 'an', 'analytical', 'solution', 'of', 'the', 'ginzburglandau', 'equations', 'of', 'superconductivity']] | [-0.21715805158899643, 0.17808062044068954, -0.08390637032257822, -0.0027737995178307383, -0.07580500454283677, -0.10340686104982758, 0.03912140476929311, 0.3493707899051981, -0.271040600608103, -0.27233155762466293, 0.08395405976364437, -0.2698662002714208, -0.09251017176593916, 0.23095906236565683, -0.008843337158815792, -0.0014249911152709944, -0.024716353373757254, 0.09755537958027652, -0.07220465246176061, -0.18568320827743706, 0.27738377386226487, 0.0550282514642533, 0.3354862425237512, 0.052871501543006905, 0.08837765047792345, -0.036934794332736574, 0.06214731992188787, 0.07147584550899083, -0.1400813308005943, 0.043775111004017674, 0.17500723484091651, -0.007286139135220975, 0.20874662902086782, -0.43207307618397933, -0.2423152745498392, 0.09371112921508029, 0.14679063950330976, 0.05697767762467265, -0.055295411638116305, -0.24952844973319235, 0.03646124827000909, -0.11490067410826062, -0.10243620976017645, -0.029860665048591983, 0.05962798499893278, 0.06003247918590951, -0.2865444536959657, 0.08751519784038045, 0.05841531229611391, 0.12077414433065897, -0.10882491776301788, -0.0794008754265423, -0.017737585921377804, 0.09782904529800782, 0.06862889237116832, 0.08127667448029686, 0.18519598310693908, -0.12734504972542757, -0.06295049113209526, 0.3117781832623176, -0.08979911492506523, -0.14370975925806143, 0.12367259865202822, -0.17974454597331202, -0.02127388318797621, 0.19131618997870156, 0.11168361571095048, 0.10811748307866928, -0.1609592712842501, 0.06211342594962424, -0.026696022122334212, 0.18726889478663603, 0.09037564353993496, 0.014083284195900584, 0.22644279050664642, 0.21503701555178475, 0.04596899892054259, 0.19482370389950796, -0.15871403126631123, -0.07583571180629615, -0.25391964847371223, -0.1660910380514673, -0.1959749613649761, 0.0894112668107622, -0.09300231686994756, -0.20478156093770686, 0.40224638742764884, 0.12822379702881265, 0.18718329287497534, -0.048572425111137234, 0.25083627242845696, 0.16935363647047405, 0.0907637281463674, 0.08037451879742245, 0.2183911028700188, 0.23603886816477498, 0.18020531182320645, -0.2916540067004135, 0.08656947949202731, -0.010335026480532132] |
708.3024 | Pump-Probe Experiments on the Single-Molecule Magnet Fe8 : Measurement
of Excited Level Lifetimes | We present magnetization measurements on the single molecule magnet Fe8 in
the presence of pulsed microwave radiation. A pump-probe technique is used with
two microwave pulses with frequencies of 107 GHz and 118 GHz and pulse lengths
of several nanoseconds to study the spin dynamics via time-resolved
magnetization measurements using a Hall probe magnetometer. We find evidence
for short spin-phonon relaxation times of the order of one microsecond. The
temperature dependence of the spin-phonon relaxation time in our experiments is
in good agreement with previously published theoretical results. We also
established the presence of very short energy diffusion times, that act on a
timescale of about 70 ns.
| cond-mat.mes-hall | we present magnetization measurements on the single molecule magnet fe8 in the presence of pulsed microwave radiation a pumpprobe technique is used with two microwave pulses with frequencies of 107 ghz and 118 ghz and pulse lengths of several nanoseconds to study the spin dynamics via timeresolved magnetization measurements using a hall probe magnetometer we find evidence for short spinphonon relaxation times of the order of one microsecond the temperature dependence of the spinphonon relaxation time in our experiments is in good agreement with previously published theoretical results we also established the presence of very short energy diffusion times that act on a timescale of about 70 ns | [['we', 'present', 'magnetization', 'measurements', 'on', 'the', 'single', 'molecule', 'magnet', 'fe8', 'in', 'the', 'presence', 'of', 'pulsed', 'microwave', 'radiation', 'a', 'pumpprobe', 'technique', 'is', 'used', 'with', 'two', 'microwave', 'pulses', 'with', 'frequencies', 'of', '107', 'ghz', 'and', '118', 'ghz', 'and', 'pulse', 'lengths', 'of', 'several', 'nanoseconds', 'to', 'study', 'the', 'spin', 'dynamics', 'via', 'timeresolved', 'magnetization', 'measurements', 'using', 'a', 'hall', 'probe', 'magnetometer', 'we', 'find', 'evidence', 'for', 'short', 'spinphonon', 'relaxation', 'times', 'of', 'the', 'order', 'of', 'one', 'microsecond', 'the', 'temperature', 'dependence', 'of', 'the', 'spinphonon', 'relaxation', 'time', 'in', 'our', 'experiments', 'is', 'in', 'good', 'agreement', 'with', 'previously', 'published', 'theoretical', 'results', 'we', 'also', 'established', 'the', 'presence', 'of', 'very', 'short', 'energy', 'diffusion', 'times', 'that', 'act', 'on', 'a', 'timescale', 'of', 'about', '70', 'ns']] | [-0.1715321906764681, 0.18424241539280586, -0.03969536235780214, -0.01731299934046412, -0.02063356485666224, -0.11160069688964912, 0.07258748151232591, 0.43255181184590413, -0.1927493697601474, -0.32660029978594846, 0.06073723527865864, -0.2773166766618723, -0.030598794308456558, 0.3064267390269648, 0.08996327750867715, 0.023023824561042367, 0.03231382420872925, -0.030789016159596266, -0.05003578908939811, -0.18847834510745964, 0.1656987721928292, 0.07587942994238499, 0.2756044914756246, 0.07941680989676604, 0.11956368483758222, -0.012835588144500636, 0.05382558101512216, -0.03653449542320299, -0.16861424895244084, 0.03739911547206618, 0.2337418907490145, -0.019485834056804714, 0.17621179179426422, -0.48393770152082044, -0.19929829370920304, 0.03301036003028491, 0.0733221391509923, 0.16621145205243482, -0.053626169870834996, -0.260796175269341, 0.028855791276631255, -0.12295702848307512, -0.10198883637160717, -0.06373349488367913, 0.019415753061400243, 0.03483739617513493, -0.24420317614244091, 0.15942151278782316, 0.02871631217378847, 0.09897497437756371, -0.0915728370891884, -0.06483489089576458, 0.05045019097721066, 0.035042336906944575, 0.05054908814296747, 0.08190462851888258, 0.1798770824852572, -0.035147641367210006, -0.17026846671338985, 0.2980192869004828, -0.15586799383702413, -0.053721764073189765, 0.18143716073784702, -0.23693931237277058, -0.10350695390392232, 0.16428825902511124, 0.10826577765530804, 0.1502383133801804, -0.15884426074033534, -0.003478775228830744, -0.010097291842275471, 0.28916165393915166, 0.09586203900053752, 0.10925971449257675, 0.20568320655298453, 0.22506289052371695, 0.010405366899687107, 0.1474776054685073, -0.20160744095617836, -0.041346990408513834, -0.2581567788729444, -0.08212091972301197, -0.19933354314330412, 0.1517258958235659, -0.08806883626918231, -0.059507854101765484, 0.4312151309654669, 0.16084557030936358, 0.1823385843006825, 0.00277520225521315, 0.30608966395138176, 0.09195384117494407, 0.05352121574752447, 0.020217574149784114, 0.2721256619767734, 0.210322072962299, 0.13848766864436954, -0.3149925627642208, 0.04154333539945246, -0.06477186151918161] |
708.3025 | The Green's function and the Ahlfors map | The classical Green's function associated to a simply connected domain in the
complex plane is easily expressed in terms of a Riemann mapping function. The
purpose of this paper is to express the Green's function of a finitely
connected domain in the plane in terms of a single Ahlfors mapping of the
domain, which is a proper holomorphic mapping of the domain onto the unit disc
that is the analogue of the Riemann map in the multiply connected setting.
| math.CV | the classical greens function associated to a simply connected domain in the complex plane is easily expressed in terms of a riemann mapping function the purpose of this paper is to express the greens function of a finitely connected domain in the plane in terms of a single ahlfors mapping of the domain which is a proper holomorphic mapping of the domain onto the unit disc that is the analogue of the riemann map in the multiply connected setting | [['the', 'classical', 'greens', 'function', 'associated', 'to', 'a', 'simply', 'connected', 'domain', 'in', 'the', 'complex', 'plane', 'is', 'easily', 'expressed', 'in', 'terms', 'of', 'a', 'riemann', 'mapping', 'function', 'the', 'purpose', 'of', 'this', 'paper', 'is', 'to', 'express', 'the', 'greens', 'function', 'of', 'a', 'finitely', 'connected', 'domain', 'in', 'the', 'plane', 'in', 'terms', 'of', 'a', 'single', 'ahlfors', 'mapping', 'of', 'the', 'domain', 'which', 'is', 'a', 'proper', 'holomorphic', 'mapping', 'of', 'the', 'domain', 'onto', 'the', 'unit', 'disc', 'that', 'is', 'the', 'analogue', 'of', 'the', 'riemann', 'map', 'in', 'the', 'multiply', 'connected', 'setting']] | [-0.18023119025121007, 0.017391347125927104, -0.07017528319943554, 0.035162309136041264, -0.12450888962779619, -0.0021913310666155966, 0.008114342060517756, 0.3427269909106478, -0.3328612436410747, -0.17710203986284853, 0.1296374757797752, -0.24470955166447012, -0.1714502152385591, 0.21696375069927565, -0.07204682770173383, 0.0037376646989885766, 0.018546848227800446, 0.04495855650416564, -0.09099077185486219, -0.1955931307865849, 0.4005628482827657, -0.08405987313606694, 0.23044503293931484, 0.07516255991274043, 0.11918813861387817, 0.03912648219685955, -0.01930152943145625, 0.02402403236284286, -0.07369292104556711, 0.1687351454261549, 0.2596154679084503, 0.08401078936537798, 0.24144459072547622, -0.39421497341952744, -0.2185129538956511, 0.14852225557676976, 0.1516461420474173, -0.03655660884378219, 0.02712009478761237, -0.2500148371003474, 0.08342189946553752, -0.11003956081392834, -0.17082433731448424, 0.028085295853641213, 0.013243378198976759, 0.035139766094404494, -0.22698288599524316, 0.04230355138925812, 0.07967533956317208, 0.02416421484815169, -0.05736818831838385, 0.001696270601706037, -0.02367135449135794, 0.14223013199052384, -0.038849330719418915, 0.22434653474395222, 0.11210028790055385, -0.13284925239078135, -0.05083411864794885, 0.36185737945068674, -0.07958060600853796, -0.3448449480524169, 0.165431734557629, -0.21668230757246948, -0.09900372371643404, 0.108878306278228, 0.15100498952537397, 0.18870840778079215, -0.18053977752599534, 0.1873249671645934, -0.10209191777990965, 0.1297499692491904, 0.09004688680266278, -0.06559389683748065, 0.2121578458566926, 0.13049633935376814, 0.0924572620918102, 0.2315435318535642, -0.020175657954945265, -0.07128700861542285, -0.3555016966088663, -0.23105326484994892, -0.27038429779165624, 0.06411209084753748, -0.09665896681054861, -0.2458953719020267, 0.46287386836130406, 0.029109624523192032, 0.20380485440969845, 0.07803073810867352, 0.28668078534965274, 0.1680670815366733, 0.10599545089975942, 0.010878742790391928, 0.12183384276643584, 0.1493718208880694, 0.017635994962169024, -0.17158996060938586, 0.03193450283518509, 0.11538693924799939] |
708.3026 | Controlling the Ratchet Effect for Cold Atoms | Low-order quantum resonances manifested by directed currents have been
realized with cold atoms. Here we show that by increasing the strength of an
experimentally achievable delta-kicking ratchet potential, quantum resonances
of a very high order may naturally emerge and can induce larger ratchet
currents than low-order resonances, with the underlying classical limit being
fully chaotic. The results offer a means of controlling quantum transport of
cold atoms.
| quant-ph | loworder quantum resonances manifested by directed currents have been realized with cold atoms here we show that by increasing the strength of an experimentally achievable deltakicking ratchet potential quantum resonances of a very high order may naturally emerge and can induce larger ratchet currents than loworder resonances with the underlying classical limit being fully chaotic the results offer a means of controlling quantum transport of cold atoms | [['loworder', 'quantum', 'resonances', 'manifested', 'by', 'directed', 'currents', 'have', 'been', 'realized', 'with', 'cold', 'atoms', 'here', 'we', 'show', 'that', 'by', 'increasing', 'the', 'strength', 'of', 'an', 'experimentally', 'achievable', 'deltakicking', 'ratchet', 'potential', 'quantum', 'resonances', 'of', 'a', 'very', 'high', 'order', 'may', 'naturally', 'emerge', 'and', 'can', 'induce', 'larger', 'ratchet', 'currents', 'than', 'loworder', 'resonances', 'with', 'the', 'underlying', 'classical', 'limit', 'being', 'fully', 'chaotic', 'the', 'results', 'offer', 'a', 'means', 'of', 'controlling', 'quantum', 'transport', 'of', 'cold', 'atoms']] | [-0.17221086794630375, 0.31466087917367225, -0.030669872704615343, 0.03596134622817609, -0.018754923938592866, -0.1733953905111151, 0.02134226293150169, 0.3498126448430955, -0.26352047492096675, -0.2854040374617968, -0.006223725730122359, -0.24877713984851516, -0.16361378569767546, 0.2083893520340546, -0.003898466812140906, 0.061199265810202304, 0.04707597365860007, -0.014792340043098179, 0.007016914371929284, -0.18858861761973866, 0.23176606324737642, 0.057969221895657924, 0.22798797295692919, 0.09263103695780929, 0.08855591625420016, -0.07333479271228634, 0.0987524047777154, 0.05104414345140555, -0.1245458749190899, 0.11220015224013756, 0.22313425296903658, -0.04211647902726571, 0.22752813516017883, -0.4827663608784996, -0.2541062965182893, 0.1144683131141894, 0.21201041329707673, 0.19643667423680647, -0.09761826591149195, -0.3363428860068766, 0.044306305522071335, -0.16468338359063908, -0.16545664227164503, -0.14677209759464682, -0.019132925336485477, 0.044037547428160906, -0.25180171858241307, 0.08721697233172494, 0.09690741972942184, 0.11686161353683738, 0.035666275772947204, -0.07787327890965476, -0.01812178540085234, 0.05881919528343784, -0.059220545160681454, -0.021711948153965953, 0.1965769818817168, -0.15038489177823067, -0.1955272886040273, 0.39012765339506206, -0.1102668676699543, -0.17407592691814722, 0.19715513391837255, -0.18801846422616447, -0.006794633135310749, 0.1362732214046948, 0.13128824298332598, 0.06904188524792666, -0.12171920982481384, 0.07064563641759025, -0.020053342151552883, 0.11796989921070357, 0.09526014341903266, 0.1276017317423291, 0.2891647836832858, 0.1475425196616952, 0.06556781066873514, 0.12868944368213972, -0.08039017026173646, -0.1691766607144208, -0.23935341076063577, -0.10956100500953286, -0.20589758172186454, 0.05677168031979818, -0.0359321654991007, -0.12154838102939192, 0.3686845664546561, 0.11339515315997761, 0.20684022071368213, -0.03456965448863026, 0.2712142364636286, 0.21191988368310147, 0.11228391336304928, 0.04284319099657404, 0.3068048975972542, 0.17218982515189407, 0.054192566493553904, -0.2775536162896888, 0.05095778664907635, -0.032988652169926844] |
708.3027 | Free 3-distributions: holonomy, Fefferman constructions and dual
distributions | This paper analyses the parabolic geometries generated by a free
3-distribution in the tangent space of a manifold. It shows the existence of
normal Fefferman constructions over CR and Lagrangian contact structures
corresponding to holonomy reductions to SO(4,2) and SO(3,3), respectively.
There is also a fascinating construction of a `dual' distribution when the
holonomy reduces to $G_2'$. The paper concludes with some holonomy
constructions for free $n$-distributions for $n>3$.
| math.DG | this paper analyses the parabolic geometries generated by a free 3distribution in the tangent space of a manifold it shows the existence of normal fefferman constructions over cr and lagrangian contact structures corresponding to holonomy reductions to so42 and so33 respectively there is also a fascinating construction of a dual distribution when the holonomy reduces to g_2 the paper concludes with some holonomy constructions for free ndistributions for n3 | [['this', 'paper', 'analyses', 'the', 'parabolic', 'geometries', 'generated', 'by', 'a', 'free', '3distribution', 'in', 'the', 'tangent', 'space', 'of', 'a', 'manifold', 'it', 'shows', 'the', 'existence', 'of', 'normal', 'fefferman', 'constructions', 'over', 'cr', 'and', 'lagrangian', 'contact', 'structures', 'corresponding', 'to', 'holonomy', 'reductions', 'to', 'so42', 'and', 'so33', 'respectively', 'there', 'is', 'also', 'a', 'fascinating', 'construction', 'of', 'a', 'dual', 'distribution', 'when', 'the', 'holonomy', 'reduces', 'to', 'g_2', 'the', 'paper', 'concludes', 'with', 'some', 'holonomy', 'constructions', 'for', 'free', 'ndistributions', 'for', 'n3']] | [-0.17616038585958235, 0.10783031753517743, -0.05330889220075572, 0.07583516660173807, -0.1122032747918959, -0.12775212935829425, -0.021028665993499625, 0.36354168666088404, -0.24197540686958852, -0.22521008833256714, 0.08940086303354132, -0.2671484544681495, -0.18189445073606775, 0.2014959777623196, -0.1293573625769247, -0.008408456602517296, 0.055412618313258624, 0.07363856446874492, -0.19018210967838325, -0.25668516937259805, 0.38835905322476344, 0.024197813575429952, 0.2632249659475158, 0.04066225756233668, 0.11126674340202418, -0.027146921691703883, 0.0028755148900124956, 0.0273425250844037, -0.17796754663097947, 0.13773043875527732, 0.24448933748199658, 0.05539887863115462, 0.17084232343853833, -0.3507589140413877, -0.21809542885003955, 0.1360489619375371, 0.1269838635891895, 0.07241544325370342, -0.025280889829018098, -0.2867222753873862, 0.10940492199733853, -0.12228363031959709, -0.20031995337922126, -0.04867147929582964, 0.01346750756013481, -0.05190014584513847, -0.182272555963958, -0.00826489595698042, 0.10749818846199881, 0.07074563470943009, -0.06675722939647077, -0.062079088683650994, -0.07865647545686978, 0.06705111184248166, 0.06217159377325408, 0.04471955294309951, 0.04339483129125951, -0.10059201325330992, -0.11481050690909957, 0.3756241541739334, -0.04230679084738607, -0.2672322031165309, 0.11929664388983785, -0.10162426082773462, -0.1763240601730478, 0.14070265333387344, 0.08950564950731967, 0.10472380017231711, -0.06929422851060414, 0.1838553242423051, -0.054810711470268225, 0.0343795962535831, 0.11289463541470468, -0.02723219329217339, 0.09216305813478197, 0.10289320213076494, 0.1312406535143964, 0.11983390955377698, 0.006781714269891381, -0.112286279690178, -0.39487744695233074, -0.20369013318464996, -0.07633966222912182, 0.15529690525384948, -0.10201804009771234, -0.1898293774423056, 0.403791238218272, 0.03403793843736982, 0.19612194090972052, 0.0697245299405254, 0.22935568546766744, 0.02412352912292323, 0.0467116597437245, 0.10842993569702444, 0.1578706091715824, 0.21631767806555965, 0.014192789801574476, -0.18466161997468375, -0.07796721309012569, 0.14047874092562673] |
708.3028 | Boundary three-point function on AdS2 D-branes | Using the H3+-Liouville relation, I explicitly compute the boundary
three-point function on AdS2 D-branes in H3+, and check that it exhibits the
expected symmetry properties and has the correct geometrical limit. I then find
a simple relation between this boundary three-point function and certain fusing
matrix elements, which suggests a formal correspondence between the AdS2
D-branes and discrete representations of the symmetry group. Concluding
speculations deal with the fuzzy geometry of AdS2 D-branes, strings in the
Minkowskian AdS3, and the hypothetical existence of new D-branes in H3+.
| hep-th | using the h3liouville relation i explicitly compute the boundary threepoint function on ads2 dbranes in h3 and check that it exhibits the expected symmetry properties and has the correct geometrical limit i then find a simple relation between this boundary threepoint function and certain fusing matrix elements which suggests a formal correspondence between the ads2 dbranes and discrete representations of the symmetry group concluding speculations deal with the fuzzy geometry of ads2 dbranes strings in the minkowskian ads3 and the hypothetical existence of new dbranes in h3 | [['using', 'the', 'h3liouville', 'relation', 'i', 'explicitly', 'compute', 'the', 'boundary', 'threepoint', 'function', 'on', 'ads2', 'dbranes', 'in', 'h3', 'and', 'check', 'that', 'it', 'exhibits', 'the', 'expected', 'symmetry', 'properties', 'and', 'has', 'the', 'correct', 'geometrical', 'limit', 'i', 'then', 'find', 'a', 'simple', 'relation', 'between', 'this', 'boundary', 'threepoint', 'function', 'and', 'certain', 'fusing', 'matrix', 'elements', 'which', 'suggests', 'a', 'formal', 'correspondence', 'between', 'the', 'ads2', 'dbranes', 'and', 'discrete', 'representations', 'of', 'the', 'symmetry', 'group', 'concluding', 'speculations', 'deal', 'with', 'the', 'fuzzy', 'geometry', 'of', 'ads2', 'dbranes', 'strings', 'in', 'the', 'minkowskian', 'ads3', 'and', 'the', 'hypothetical', 'existence', 'of', 'new', 'dbranes', 'in', 'h3']] | [-0.1493273147511794, 0.10161894775025525, -0.1173415532075735, 0.1407102910344229, -0.08251518998728243, -0.11766882833136721, 0.008267694910944895, 0.3312836460292686, -0.2061499447973315, -0.21629029067319838, 0.08440503347150678, -0.2797051456345375, -0.1648637454436962, 0.05212000925310476, -0.07649083682985673, 0.018737516977802612, -0.034579258146804084, 0.041605094750953274, -0.17947289218508833, -0.21231026720082344, 0.3651616323176165, -0.027304979885906674, 0.3303341274691183, 0.063553792408256, 0.1368113658282646, -0.016634195852147544, -0.03230707128640524, -0.016118745660669235, -0.15609049917035261, 0.12140747871341963, 0.22124647170164471, 0.10356010421893971, 0.06362949155520128, -0.46578541435951065, -0.16001690183441306, 0.07993410055005792, 0.1422819423077758, 0.0712846064558361, -0.003184873576893276, -0.2992674186392579, 0.04314325933972763, -0.14803341007249993, -0.142437414948417, -0.047091771255593835, 0.06058770867584403, -0.0606761620986427, -0.18811996341791265, 0.05819049500860274, 0.028740762278091078, 0.07561840140802223, -0.07407168529353776, -0.03507862451789511, -0.09767486520116976, 0.10147978589588473, 0.12330294855285523, 0.06541987609248175, 0.09778158438965938, -0.16481431626422374, -0.09396242470883895, 0.3344752070775559, -0.039703664294075826, -0.2501874610045275, 0.1637706844959148, -0.14616292930576344, -0.19513738801876127, 0.04673876393001613, 0.053430943435794395, 0.1385844996066014, -0.10176910439419538, 0.21892172249432026, -0.05152692207470969, 0.13144089137833445, 0.11356749474666579, 0.04867229904697905, 0.2967079509872683, 0.07023925875681777, 0.03449983478978623, 0.16520836336408243, -0.026624139082932107, -0.09555274306601563, -0.4341690194424848, -0.15256203761930728, -0.11540435218024826, 0.11133565495418775, -0.18671376771902054, -0.221302741976065, 0.3495247222721403, 0.07982399677424583, 0.23858200739202803, 0.035580561134888423, 0.18218784040749766, 0.10030808551020401, 0.032963286327241464, 0.046608647559011396, 0.2346556456028592, 0.17592904245112698, 0.014584104438463962, -0.25731792207942666, -0.09019042345218707, 0.1958178376703155] |
708.3029 | Interplay between field-induced and frustration-induced quantum
criticalities in the frustrated two-leg Heisenberg ladder | The antiferromagnetic Heisenberg two-leg ladder in the presence of
frustration and an external magnetic field is a system that is characterized by
two sorts of quantum criticalities, not only one. One criticality is the
consequence of intrinsic frustration, and the other one is a result of the
external magnetic field. So the behaviour of each of them in the presence of
the other deserves to be studied. Using the Jordan-Wigner transformation in
dimensions higher than one and bond-mean-field theory we examine the interplay
between the field-induced and frustration-induced quantum criticalities in this
system. The present work could constitute a prototype for those systems showing
multiple, perhaps sometimes competing, quantum criticalities. We calculate
several physical quantities like the magnetization and spin susceptibility as
functions of field and temperature.
| cond-mat.str-el | the antiferromagnetic heisenberg twoleg ladder in the presence of frustration and an external magnetic field is a system that is characterized by two sorts of quantum criticalities not only one one criticality is the consequence of intrinsic frustration and the other one is a result of the external magnetic field so the behaviour of each of them in the presence of the other deserves to be studied using the jordanwigner transformation in dimensions higher than one and bondmeanfield theory we examine the interplay between the fieldinduced and frustrationinduced quantum criticalities in this system the present work could constitute a prototype for those systems showing multiple perhaps sometimes competing quantum criticalities we calculate several physical quantities like the magnetization and spin susceptibility as functions of field and temperature | [['the', 'antiferromagnetic', 'heisenberg', 'twoleg', 'ladder', 'in', 'the', 'presence', 'of', 'frustration', 'and', 'an', 'external', 'magnetic', 'field', 'is', 'a', 'system', 'that', 'is', 'characterized', 'by', 'two', 'sorts', 'of', 'quantum', 'criticalities', 'not', 'only', 'one', 'one', 'criticality', 'is', 'the', 'consequence', 'of', 'intrinsic', 'frustration', 'and', 'the', 'other', 'one', 'is', 'a', 'result', 'of', 'the', 'external', 'magnetic', 'field', 'so', 'the', 'behaviour', 'of', 'each', 'of', 'them', 'in', 'the', 'presence', 'of', 'the', 'other', 'deserves', 'to', 'be', 'studied', 'using', 'the', 'jordanwigner', 'transformation', 'in', 'dimensions', 'higher', 'than', 'one', 'and', 'bondmeanfield', 'theory', 'we', 'examine', 'the', 'interplay', 'between', 'the', 'fieldinduced', 'and', 'frustrationinduced', 'quantum', 'criticalities', 'in', 'this', 'system', 'the', 'present', 'work', 'could', 'constitute', 'a', 'prototype', 'for', 'those', 'systems', 'showing', 'multiple', 'perhaps', 'sometimes', 'competing', 'quantum', 'criticalities', 'we', 'calculate', 'several', 'physical', 'quantities', 'like', 'the', 'magnetization', 'and', 'spin', 'susceptibility', 'as', 'functions', 'of', 'field', 'and', 'temperature']] | [-0.2070573846299556, 0.1972207915203485, -0.04360859359924992, 0.061160315884210704, -0.05241153800919179, -0.1509790158024915, 0.00652314919242931, 0.336812978950403, -0.2607369002302192, -0.3052346156762233, 0.07529277799628853, -0.3010899935449873, -0.15422007931758547, 0.19477586102272784, 0.0464250555055009, -0.02357391632413344, -0.06593397834859345, 0.06291271546959049, -0.07756340440310952, -0.23591874350261474, 0.33653394756321275, 0.0032068338875274453, 0.24744298976535598, 0.056454445349998654, 0.051747943633162076, 0.02255498494819871, 0.09274151456719708, 0.06400526116882997, -0.0871634386641658, 0.06861820220134206, 0.19661899529478793, 0.016197235282835742, 0.21612446513718747, -0.41225038344661397, -0.2217554749240951, 0.068185783671363, 0.12062719733350807, 0.151622338597441, -0.011395014800308715, -0.2843769072806315, 0.011092429197142048, -0.17202367711191377, -0.145649646863892, -0.11982997784960187, -0.0429793661210819, -0.005981025145581317, -0.21638491740524177, 0.08857565246612395, 0.10858847030867187, 0.11771821883684468, -0.065064509617283, -0.08280012707987297, -0.023836183958568624, 0.13995405507185274, 0.0679958380670065, 0.061383616009224505, 0.12570607149603938, -0.16542598705494865, -0.1806158550261032, 0.3660082095893957, -0.026103315803445024, -0.16046355988290753, 0.21728370361407065, -0.1774840642335928, -0.14318881266646916, 0.06939229368054796, 0.07984927304029937, 0.07635031754912305, -0.15231208819600325, 0.07139801968901699, 0.002775884492115842, 0.15941586755290035, -0.0034998394844550935, 0.0889920814273258, 0.24917265256526805, 0.14741031790433068, 0.04345635226779869, 0.21404507874126827, -0.07608346872993502, -0.145384774650521, -0.24707061656619542, -0.19348430314234324, -0.20391573603191074, 0.07197476141785349, -0.09975167864953012, -0.1777040251634187, 0.3930094428951778, 0.1966939802421996, 0.17366098710298833, -0.0682336794607903, 0.2556206849921081, 0.12386848609654293, 0.06404613885688522, 0.03380029190272566, 0.25205827119301943, 0.15664864095142259, 0.10033797124855309, -0.2648126151124459, 0.05115381060611634, 0.058058311338610356] |
708.303 | QCD sum rules study of \Xi_c and \Xi_b baryons | We use QCD sum rules to study the masses of the baryons $\Xi_c$ and $\Xi_b$.
We work with a current where the strange and the light quarks are in a relative
spin zero, at leading order in $\alpha_s$. We consider the contributions of
condensates up to dimension six. For $\Xi_b$ we get $m_{\Xi_{b}}= (5.75\pm
0.25) {\rm GeV}$, and for $\Xi_c$ we get $m_{\Xi_{c}}= (2.5\pm 0.2) {\rm GeV}$,
both in excelent agreement with the experimental values. We also make
predictions to the state $\Omega_b(ssb)$ obtaining m_{\Omega_{b}}= (5.82\pm
0.23) GeV.
| hep-ph | we use qcd sum rules to study the masses of the baryons xi_c and xi_b we work with a current where the strange and the light quarks are in a relative spin zero at leading order in alpha_s we consider the contributions of condensates up to dimension six for xi_b we get m_xi_b 575pm 025 rm gev and for xi_c we get m_xi_c 25pm 02 rm gev both in excelent agreement with the experimental values we also make predictions to the state omega_bssb obtaining m_omega_b 582pm 023 gev | [['we', 'use', 'qcd', 'sum', 'rules', 'to', 'study', 'the', 'masses', 'of', 'the', 'baryons', 'xi_c', 'and', 'xi_b', 'we', 'work', 'with', 'a', 'current', 'where', 'the', 'strange', 'and', 'the', 'light', 'quarks', 'are', 'in', 'a', 'relative', 'spin', 'zero', 'at', 'leading', 'order', 'in', 'alpha_s', 'we', 'consider', 'the', 'contributions', 'of', 'condensates', 'up', 'to', 'dimension', 'six', 'for', 'xi_b', 'we', 'get', 'm_xi_b', '575pm', '025', 'rm', 'gev', 'and', 'for', 'xi_c', 'we', 'get', 'm_xi_c', '25pm', '02', 'rm', 'gev', 'both', 'in', 'excelent', 'agreement', 'with', 'the', 'experimental', 'values', 'we', 'also', 'make', 'predictions', 'to', 'the', 'state', 'omega_bssb', 'obtaining', 'm_omega_b', '582pm', '023', 'gev']] | [-0.0760884004270249, 0.23357135393634076, -0.05487147786245659, 0.10889082687066459, -0.010959315056935317, -0.08647322388956459, 0.1008470368503434, 0.3726409344547769, -0.15229485676305868, -0.27645623847478773, 0.005531346688058409, -0.3883651129265384, 0.08214982772223288, 0.11811765316851074, 0.06766262130312077, 0.0651665608579273, 0.028068651300400677, 0.024724239915064197, -0.08593512248679451, -0.234131318928742, 0.2876077712649798, -0.04592718955742695, 0.17312891649582038, 0.1593038383644165, 0.03691364140476941, -0.053798172719458616, 0.026313531246581454, -0.09102975983717819, -0.23711162144545375, 0.08298578450921923, 0.20188167151745137, 0.0032228036505374605, 0.14004342703762032, -0.3004352249000676, -0.07440991359535695, 0.12899778835566306, 0.1537287826252329, 0.12679235503168368, 0.009424997822994866, -0.28859611555207065, 0.17398314790448127, -0.2201138155580294, -0.15403624571201097, -0.12247852036138861, -0.0027085015402607076, -0.06176286459071335, -0.33233906489955944, 0.12937444357858777, -0.06978429691458232, 0.027079165129490743, -0.04866701930977132, -0.244763285398665, -0.0221759062771481, 0.04315032899555773, 0.11778099605637579, 0.12133353946605561, 0.07401621158848085, -0.15392645747150954, -0.13358455743617947, 0.4402033009555009, -0.10692229254381368, -0.14361662544855258, 0.10671834327939261, -0.19484705990180373, -0.12798467104141487, 0.08814850636962347, 0.1750969528107018, 0.07573564950818275, -0.1109740798863463, 0.04294577248681269, -0.01681446097791195, 0.21884828803084064, 0.08877278665057951, 0.08920527614073519, 0.2172249683247107, 0.1588614490735004, -0.021854923731397566, 0.05756834979600659, -0.11608922427020422, -0.065703134092207, -0.3329288297014811, -0.11707742975615873, -0.046035005449794414, 0.1099449595459169, -0.10330843581287787, -0.016143087371502343, 0.3836623566429608, 0.1683862132031652, 0.3232574789481743, 0.0748817931730073, 0.27933856390598344, 0.09825279930515624, 0.012597379286023901, 0.10458357467475098, 0.30827811886499656, 0.2129423216485032, 0.13945555816427235, -0.2084540907157267, -0.06297963699212343, 0.008501413925664454] |
708.3031 | Bounds to binding energies from the concavity of thermodynamical
functions | Sequences of experimental ground-state energies are mapped onto concave
patterns cured from convexities due to pairing and/or shell effects. The same
patterns, completed by a list of excitation energies, can be used to give
numerical estimates of the grand potential $\Omega(\beta,\mu)$ for a mixture of
nuclei at low or moderate temperatures $T=\beta^{-1}$ and at many chemical
potentials $\mu.$ The average nucleon number $<{\bf A} >(\beta,\mu)$ then
becomes a continuous variable, allowing extrapolations towards nuclear masses
closer to drip lines. We study the possible concavity of several
thermodynamical functions, such as the free energy and the average energy, as
functions of $<{\bf A} >.$ Concavity, when present in such functions, allows
trivial interpolations and extrapolations providing upper and lower bounds,
respectively, to binding energies. Such bounds define an error bar for the
prediction of binding energies. An extrapolation scheme for such concave
functions is tested. We conclude with numerical estimates of the binding
energies of a few nuclei closer to drip lines.
| nucl-th | sequences of experimental groundstate energies are mapped onto concave patterns cured from convexities due to pairing andor shell effects the same patterns completed by a list of excitation energies can be used to give numerical estimates of the grand potential omegabetamu for a mixture of nuclei at low or moderate temperatures tbeta1 and at many chemical potentials mu the average nucleon number bf a betamu then becomes a continuous variable allowing extrapolations towards nuclear masses closer to drip lines we study the possible concavity of several thermodynamical functions such as the free energy and the average energy as functions of bf a concavity when present in such functions allows trivial interpolations and extrapolations providing upper and lower bounds respectively to binding energies such bounds define an error bar for the prediction of binding energies an extrapolation scheme for such concave functions is tested we conclude with numerical estimates of the binding energies of a few nuclei closer to drip lines | [['sequences', 'of', 'experimental', 'groundstate', 'energies', 'are', 'mapped', 'onto', 'concave', 'patterns', 'cured', 'from', 'convexities', 'due', 'to', 'pairing', 'andor', 'shell', 'effects', 'the', 'same', 'patterns', 'completed', 'by', 'a', 'list', 'of', 'excitation', 'energies', 'can', 'be', 'used', 'to', 'give', 'numerical', 'estimates', 'of', 'the', 'grand', 'potential', 'omegabetamu', 'for', 'a', 'mixture', 'of', 'nuclei', 'at', 'low', 'or', 'moderate', 'temperatures', 'tbeta1', 'and', 'at', 'many', 'chemical', 'potentials', 'mu', 'the', 'average', 'nucleon', 'number', 'bf', 'a', 'betamu', 'then', 'becomes', 'a', 'continuous', 'variable', 'allowing', 'extrapolations', 'towards', 'nuclear', 'masses', 'closer', 'to', 'drip', 'lines', 'we', 'study', 'the', 'possible', 'concavity', 'of', 'several', 'thermodynamical', 'functions', 'such', 'as', 'the', 'free', 'energy', 'and', 'the', 'average', 'energy', 'as', 'functions', 'of', 'bf', 'a', 'concavity', 'when', 'present', 'in', 'such', 'functions', 'allows', 'trivial', 'interpolations', 'and', 'extrapolations', 'providing', 'upper', 'and', 'lower', 'bounds', 'respectively', 'to', 'binding', 'energies', 'such', 'bounds', 'define', 'an', 'error', 'bar', 'for', 'the', 'prediction', 'of', 'binding', 'energies', 'an', 'extrapolation', 'scheme', 'for', 'such', 'concave', 'functions', 'is', 'tested', 'we', 'conclude', 'with', 'numerical', 'estimates', 'of', 'the', 'binding', 'energies', 'of', 'a', 'few', 'nuclei', 'closer', 'to', 'drip', 'lines']] | [-0.06572253984815013, 0.14266643931070758, -0.06083906835981838, 0.1449459097414049, -0.0038657297919147044, -0.13146221540200542, 0.1171652321899954, 0.3890887224437587, -0.22148498382899653, -0.3045751303610093, 0.03505966034439632, -0.2918918765159712, -0.020069041401411424, 0.17395021075107533, 0.030175450835308794, 0.05832985932382304, 0.009958578770066489, 0.041843355224400455, -0.13868616994378105, -0.16058935719079473, 0.2988248052918967, 0.10173152775486123, 0.2016655978067257, 0.14204387969202684, 0.018571255917502742, -0.023930372851047776, 0.04028546598113183, -0.016161372703529377, -0.1661071321522852, 0.10759963278963272, 0.2533314874126289, 0.07363210133505317, 0.2410233692799068, -0.41602126792594557, -0.1940090696952663, 0.1403685180915508, 0.1370924920569988, 0.11538335736020931, -0.04092935762666869, -0.2414336722437878, 0.03782994673241797, -0.1549719443278235, -0.18547706622571783, -0.1118126148079762, 0.024386544237440487, 0.09925452892598256, -0.30444241234880387, 0.07146324953298618, -0.01078103381390654, 0.06772146988261063, -0.12388257504881611, -0.2151665156180004, -0.06568536039957273, 0.08471546526621213, 0.06840394960815942, 0.06416443082410256, 0.17208394726574328, -0.11813389511673518, -0.06354861942986788, 0.393973764430427, -0.018965921610734373, -0.1678504291043248, 0.18695529658089644, -0.12704253520629127, -0.1272521437586537, 0.18907688307845322, 0.161405666356426, 0.11418884773533675, -0.10916963793857554, 0.04925618610368989, 0.009204491551192302, 0.15419750210811506, 0.08312313893880204, 0.03752388940163472, 0.19074467920977184, 0.10882448212759066, 0.07539508386065527, 0.11950859008942666, -0.10933127341815417, -0.0704851810825526, -0.3245953003335568, -0.08523820731613152, -0.15666559074109174, 0.04999169390707177, -0.09030124913196741, -0.14718921846159552, 0.3683562239262218, 0.06339754678057097, 0.24212565618045861, 0.09374400772704924, 0.2478311753893306, 0.12950809899594565, 0.07692460881168339, 0.07467429454104518, 0.22336623807285427, 0.14846137708269716, 0.034492570105149355, -0.20535395283152424, 0.014088577230654235, 0.07485884541071623] |
708.3032 | Charged Black Holes on DGP Brane | We consider charged black holes localized on a three-brane in the DGP model.
With a spherically symmetric metric ansatz on the brane and assuming a
Z_2-symmetry across the brane, we find two types of solutions which correspond
to the so-called regular and accelerated branches in the DGP model. When the
charge of the black hole vanishes, our solutions agree with the Schwarzschild
solutions obtained by Gabadadze and Iglesias.
| hep-th | we consider charged black holes localized on a threebrane in the dgp model with a spherically symmetric metric ansatz on the brane and assuming a z_2symmetry across the brane we find two types of solutions which correspond to the socalled regular and accelerated branches in the dgp model when the charge of the black hole vanishes our solutions agree with the schwarzschild solutions obtained by gabadadze and iglesias | [['we', 'consider', 'charged', 'black', 'holes', 'localized', 'on', 'a', 'threebrane', 'in', 'the', 'dgp', 'model', 'with', 'a', 'spherically', 'symmetric', 'metric', 'ansatz', 'on', 'the', 'brane', 'and', 'assuming', 'a', 'z_2symmetry', 'across', 'the', 'brane', 'we', 'find', 'two', 'types', 'of', 'solutions', 'which', 'correspond', 'to', 'the', 'socalled', 'regular', 'and', 'accelerated', 'branches', 'in', 'the', 'dgp', 'model', 'when', 'the', 'charge', 'of', 'the', 'black', 'hole', 'vanishes', 'our', 'solutions', 'agree', 'with', 'the', 'schwarzschild', 'solutions', 'obtained', 'by', 'gabadadze', 'and', 'iglesias']] | [-0.12153156748493477, 0.06286905101596323, -0.053534821251078564, 0.11947831712142729, -0.04822450274985064, -0.19144454456674045, -0.02267055503804894, 0.2659111955367467, -0.11792784282828078, -0.25252808118239045, 0.07000535221167785, -0.33974488665733266, -0.10033038425642778, 0.1306576806682107, -0.034840430626097846, -0.02911143537665553, -0.01316899324164671, 0.05049065767568262, -0.09439498248427887, -0.21186353600762017, 0.42811601650079384, 0.013999027994406573, 0.2898178270415348, -0.04663526339401655, 0.12897729237481734, -0.037603889975477665, 0.04706217011655955, 0.06683878562248805, -0.20202804734820828, 0.06451762213563438, 0.1511928836322006, 0.09058543116621234, 0.1453882948947413, -0.4374517234151854, -0.23913489076692393, 0.09170568454325856, 0.15666494769838585, 0.19842300865874515, -0.0793442227637998, -0.31752394071287093, 0.08801374477950637, -0.22822151650838993, -0.16571882141836206, 0.018948755528339568, -0.0039174878449343585, -0.019491928311147017, -0.22217627199750176, 0.12999826279359267, 0.0462406891713138, -0.12346360150395948, -0.18454372124773832, -0.03783436166122556, -0.09648300778901424, 0.015863729393030927, 0.1669458998110392, -0.0059708451153710485, 0.10006461458910695, -0.10681616464931079, -0.1193449882146738, 0.3325140352963525, -0.1157056505428901, -0.27095178545192433, 0.16172838172710993, -0.1918951592147898, -0.056140352424015015, 0.046654446276507396, 0.09934149138108991, 0.2521526896435877, -0.1124544201133283, 0.23431425404423328, -0.006930861505679786, 0.1353768056638621, 0.14568221466341877, -0.013388997272533528, 0.3733941612436491, 0.10693707286640454, 0.012295026181484847, 0.16909543141339192, -0.03378730376853662, -0.16730673343408853, -0.32481331638443994, -0.09656757513157037, -0.11178799672737061, 0.08742765283814687, -0.23855963418442544, -0.25901558584369283, 0.3822718798155085, 0.06692488164202694, 0.2039493611013955, 0.035622475673495926, 0.20463765096476838, 0.042004871135919955, 0.020586072344004232, 0.1586460148477379, 0.3205185224172002, 0.06933943578384488, 0.13903935575474272, -0.23474848375874846, -0.11647852528018549, 0.14596629859057858] |
708.3033 | Osculating orbits in Schwarzschild spacetime, with an application to
extreme mass-ratio inspirals | We present a method to integrate the equations of motion that govern bound,
accelerated orbits in Schwarzschild spacetime. At each instant the true
worldline is assumed to lie tangent to a reference geodesic, called an
osculating orbit, such that the worldline evolves smoothly from one such
geodesic to the next. Because a geodesic is uniquely identified by a set of
constant orbital elements, the transition between osculating orbits corresponds
to an evolution of the elements. In this paper we derive the evolution
equations for a convenient set of orbital elements, assuming that the force
acts only within the orbital plane; this is the only restriction that we impose
on the formalism, and we do not assume that the force must be small. As an
application of our method, we analyze the relative motion of two massive
bodies, assuming that one body is much smaller than the other. Using the hybrid
Schwarzschild/post-Newtonian equations of motion formulated by Kidder, Will,
and Wiseman, we treat the unperturbed motion as geodesic in a Schwarzschild
spacetime whose mass parameter is equal to the system's total mass. The force
then consists of terms that depend on the system's reduced mass. We highlight
the importance of conservative terms in this force, which cause significant
long-term changes in the time-dependence and phase of the relative orbit. From
our results we infer some general limitations of the radiative approximation to
the gravitational self-force, which uses only the dissipative terms in the
force.
| gr-qc | we present a method to integrate the equations of motion that govern bound accelerated orbits in schwarzschild spacetime at each instant the true worldline is assumed to lie tangent to a reference geodesic called an osculating orbit such that the worldline evolves smoothly from one such geodesic to the next because a geodesic is uniquely identified by a set of constant orbital elements the transition between osculating orbits corresponds to an evolution of the elements in this paper we derive the evolution equations for a convenient set of orbital elements assuming that the force acts only within the orbital plane this is the only restriction that we impose on the formalism and we do not assume that the force must be small as an application of our method we analyze the relative motion of two massive bodies assuming that one body is much smaller than the other using the hybrid schwarzschildpostnewtonian equations of motion formulated by kidder will and wiseman we treat the unperturbed motion as geodesic in a schwarzschild spacetime whose mass parameter is equal to the systems total mass the force then consists of terms that depend on the systems reduced mass we highlight the importance of conservative terms in this force which cause significant longterm changes in the timedependence and phase of the relative orbit from our results we infer some general limitations of the radiative approximation to the gravitational selfforce which uses only the dissipative terms in the force | [['we', 'present', 'a', 'method', 'to', 'integrate', 'the', 'equations', 'of', 'motion', 'that', 'govern', 'bound', 'accelerated', 'orbits', 'in', 'schwarzschild', 'spacetime', 'at', 'each', 'instant', 'the', 'true', 'worldline', 'is', 'assumed', 'to', 'lie', 'tangent', 'to', 'a', 'reference', 'geodesic', 'called', 'an', 'osculating', 'orbit', 'such', 'that', 'the', 'worldline', 'evolves', 'smoothly', 'from', 'one', 'such', 'geodesic', 'to', 'the', 'next', 'because', 'a', 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708.3034 | Dust formation in electric arc furnace : birth of the particles | The characterization of Electric Arc Furnace (EAF) dust shows that bubble
burst at the liquid steel surface is the principal source of dust emission. We
have therefore developed an experimental device for studying this phenomenon.
As in the case of the air-water system, the bubble-burst gives birth to two
types of droplets: film drops and jet drops. The jet drop formation is observed
with high-speed video. The film drop aerosol is collected on filters and then
characterized by means of SEM, granulometric and gravimetric analyses. Results
are presented and discussed. The quantification of both types of projections
leads to the conclusion that the film drop projections represent the major
source of dust. The amount of film drops greatly decreases with the parent
bubble size. Under 4.5 mm in bubble diameter, no film drops are formed.
Decreasing enough the bubble size would therefore represent an effective
solution for reducing drastically the EAF dust emission.
| cond-mat.mtrl-sci | the characterization of electric arc furnace eaf dust shows that bubble burst at the liquid steel surface is the principal source of dust emission we have therefore developed an experimental device for studying this phenomenon as in the case of the airwater system the bubbleburst gives birth to two types of droplets film drops and jet drops the jet drop formation is observed with highspeed video the film drop aerosol is collected on filters and then characterized by means of sem granulometric and gravimetric analyses results are presented and discussed the quantification of both types of projections leads to the conclusion that the film drop projections represent the major source of dust the amount of film drops greatly decreases with the parent bubble size under 45 mm in bubble diameter no film drops are formed decreasing enough the bubble size would therefore represent an effective solution for reducing drastically the eaf dust emission | [['the', 'characterization', 'of', 'electric', 'arc', 'furnace', 'eaf', 'dust', 'shows', 'that', 'bubble', 'burst', 'at', 'the', 'liquid', 'steel', 'surface', 'is', 'the', 'principal', 'source', 'of', 'dust', 'emission', 'we', 'have', 'therefore', 'developed', 'an', 'experimental', 'device', 'for', 'studying', 'this', 'phenomenon', 'as', 'in', 'the', 'case', 'of', 'the', 'airwater', 'system', 'the', 'bubbleburst', 'gives', 'birth', 'to', 'two', 'types', 'of', 'droplets', 'film', 'drops', 'and', 'jet', 'drops', 'the', 'jet', 'drop', 'formation', 'is', 'observed', 'with', 'highspeed', 'video', 'the', 'film', 'drop', 'aerosol', 'is', 'collected', 'on', 'filters', 'and', 'then', 'characterized', 'by', 'means', 'of', 'sem', 'granulometric', 'and', 'gravimetric', 'analyses', 'results', 'are', 'presented', 'and', 'discussed', 'the', 'quantification', 'of', 'both', 'types', 'of', 'projections', 'leads', 'to', 'the', 'conclusion', 'that', 'the', 'film', 'drop', 'projections', 'represent', 'the', 'major', 'source', 'of', 'dust', 'the', 'amount', 'of', 'film', 'drops', 'greatly', 'decreases', 'with', 'the', 'parent', 'bubble', 'size', 'under', '45', 'mm', 'in', 'bubble', 'diameter', 'no', 'film', 'drops', 'are', 'formed', 'decreasing', 'enough', 'the', 'bubble', 'size', 'would', 'therefore', 'represent', 'an', 'effective', 'solution', 'for', 'reducing', 'drastically', 'the', 'eaf', 'dust', 'emission']] | [-0.08444748030677529, 0.16082402887791672, -0.08190479233407562, -0.014844658939278145, -0.019086958558641766, -0.09689956986786503, 0.02362841696671431, 0.39802426010627595, -0.23387564765902139, -0.3302609157736266, 0.10267034991442128, -0.3239865780158557, -0.031240042838218966, 0.1980657149741953, -0.057065120708246375, 0.017565763793659005, 0.03554057564868249, -0.0887075552278762, -0.03894884192605356, -0.21955586126760432, 0.2627696911750766, 0.08427741890562557, 0.30518805050585224, 0.10557864476753534, 0.08398236943053473, -0.04514989703380037, -0.035562830413446614, 0.03776048515665982, -0.16163460838374463, 0.05011785465122605, 0.20080865412570634, 0.05900925159834227, 0.17688195120641276, -0.47144329823602577, -0.22670128740872697, 0.02830251387173408, 0.13560805096609616, 0.07243881685855358, -0.06449363509110347, -0.2260560833031042, 0.06907193257632714, -0.15895502321961286, -0.18515337248773953, 0.04574021013870247, 0.05400041258881653, 0.008013026966325828, -0.20079428904634705, 0.0748068904923505, 0.06798137143242027, 0.07065620084023594, -0.08393405173831668, -0.09502903973732732, -0.07423844017505057, 0.08129443969320212, 0.08633330156934742, 0.039958930635628734, 0.2744555159542391, -0.1367575190700958, -0.014295713485855805, 0.3549652476059763, -0.048888074032698854, -0.08033961580335208, 0.20331882408476973, -0.1816322581205321, -0.02757636518952878, 0.2508927847589611, 0.13865808423265422, 0.07123460015894748, -0.11534114648882103, -0.0339032142181072, -0.03249028530109698, 0.21693401107270466, 0.14700100376074643, -0.009935475558832925, 0.24880456201438056, 0.230065515381667, 0.0333222664791576, 0.20959555614574224, -0.19021603551319508, -0.0211985872041336, -0.26566557690354164, -0.17901345942242952, -0.15622753787657098, 0.014851322707009354, -0.1374966545864529, -0.17859568973500772, 0.334169555882813, 0.07072590525249804, 0.16990686957969478, 0.007772150320785218, 0.24191953003786407, 0.06694704584247359, 0.061442453603376634, 0.07249330981989931, 0.25821286443571906, 0.12249599492765571, 0.138459762198947, -0.23617617761422144, 0.13526212783701913, 0.01238915080504835] |
708.3035 | Topology effects on the heat capacity of mesoscopic superconducting
disks | Phase transitions in superconducting mesoscopic disks have been studied over
the H-T phase diagram through heat capacity measurement of an array of
independent aluminium disks. These disks exhibit non periodic modulations
versus H of the height of the heat capacity jump at the superconducting to
normal transition. This behaviour is attributed to giant vortex states
characterized by their vorticity L. A crossover from a bulk-like to a
mesoscopic behaviour is demonstrated. $C_{\rm p}$ versus H plots exhibit
cascades of phase transitions as L increases or decreases by one unity, with a
strong hysteresis. Phase diagrams of giant vortex states inside the
superconducting region are drawn in the vortex penetration and expulsion
regimes and phase transitions driven by temperature between vortex states are
thus predicted in the zero field cooled regime before being experimentally
evidenced.
| cond-mat.mes-hall | phase transitions in superconducting mesoscopic disks have been studied over the ht phase diagram through heat capacity measurement of an array of independent aluminium disks these disks exhibit non periodic modulations versus h of the height of the heat capacity jump at the superconducting to normal transition this behaviour is attributed to giant vortex states characterized by their vorticity l a crossover from a bulklike to a mesoscopic behaviour is demonstrated c_rm p versus h plots exhibit cascades of phase transitions as l increases or decreases by one unity with a strong hysteresis phase diagrams of giant vortex states inside the superconducting region are drawn in the vortex penetration and expulsion regimes and phase transitions driven by temperature between vortex states are thus predicted in the zero field cooled regime before being experimentally evidenced | [['phase', 'transitions', 'in', 'superconducting', 'mesoscopic', 'disks', 'have', 'been', 'studied', 'over', 'the', 'ht', 'phase', 'diagram', 'through', 'heat', 'capacity', 'measurement', 'of', 'an', 'array', 'of', 'independent', 'aluminium', 'disks', 'these', 'disks', 'exhibit', 'non', 'periodic', 'modulations', 'versus', 'h', 'of', 'the', 'height', 'of', 'the', 'heat', 'capacity', 'jump', 'at', 'the', 'superconducting', 'to', 'normal', 'transition', 'this', 'behaviour', 'is', 'attributed', 'to', 'giant', 'vortex', 'states', 'characterized', 'by', 'their', 'vorticity', 'l', 'a', 'crossover', 'from', 'a', 'bulklike', 'to', 'a', 'mesoscopic', 'behaviour', 'is', 'demonstrated', 'c_rm', 'p', 'versus', 'h', 'plots', 'exhibit', 'cascades', 'of', 'phase', 'transitions', 'as', 'l', 'increases', 'or', 'decreases', 'by', 'one', 'unity', 'with', 'a', 'strong', 'hysteresis', 'phase', 'diagrams', 'of', 'giant', 'vortex', 'states', 'inside', 'the', 'superconducting', 'region', 'are', 'drawn', 'in', 'the', 'vortex', 'penetration', 'and', 'expulsion', 'regimes', 'and', 'phase', 'transitions', 'driven', 'by', 'temperature', 'between', 'vortex', 'states', 'are', 'thus', 'predicted', 'in', 'the', 'zero', 'field', 'cooled', 'regime', 'before', 'being', 'experimentally', 'evidenced']] | [-0.20726683233350293, 0.2945193337692936, -0.044396989690417894, 0.012586717908235906, -0.004839140887080289, -0.14961231126686309, 0.115038902140848, 0.3500364986109311, -0.24422942595417374, -0.27372381048026817, 0.0373891079251015, -0.3180373415225811, -0.06021471388130657, 0.17604112696535051, 0.04876677331027276, 0.014602431756402575, -0.047519184271943994, -0.0238901952476199, -0.08802215843252949, -0.15719178026201508, 0.29213163764702516, 0.0045960094460890865, 0.3125817279275785, 0.018063888773878118, 0.009103228608250562, -0.12499132422980533, 0.07925615233409135, 0.05654621896778803, -0.210796239577345, -0.08094965250173987, 0.24695189318397262, -0.0570071561974078, 0.1711576833987414, -0.41930925483301057, -0.23369323177638449, 0.10659318453277837, 0.19442569544893315, 0.061513897420755075, -0.005003215547011637, -0.28037903828324, 0.01475701295534399, -0.11372079401548062, -0.147503327074419, -0.052811507300696156, 0.06063331485996453, 0.02171514080420359, -0.21692844031295225, 0.10289944809472272, 0.09056687152791601, 0.14287613766331317, -0.0020240820500041436, -0.0949105576598155, -0.07779339945930709, 0.060899747516473396, 0.006137431696502131, 0.04296186679988099, 0.1913580858926619, -0.1481369346807669, -0.07175633502748809, 0.2875299154947609, -0.06334325553738136, -0.05140791738878435, 0.15899396839259722, -0.21216575536744864, -0.019459303313172978, 0.2704075358446632, 0.08852178627388801, 0.06177764859592626, -0.07618758662033882, 0.03277580835074603, 0.028655625441903945, 0.14019856865973032, 0.09102693971580089, 0.052432007163262635, 0.296272492967546, 0.1851777129010784, -0.0001647030185810777, 0.23805014168454416, -0.14255716650809314, -0.14072670078481922, -0.25087540240874934, -0.13702767820500616, -0.21332242077133104, 0.02234463060601378, -0.06082182465822248, -0.21013719970777409, 0.3292795517099604, 0.049306659396293, 0.24207335037032468, -0.04664120644525583, 0.23006945370640883, 0.12905166772760646, 0.08633898750621714, 0.07114254677348505, 0.2562002863390927, 0.2245637184293913, 0.17686643452407905, -0.30942246703076554, 0.08730898925568908, 0.010458773554566859] |
708.3036 | On the algebraic classification of K-local spectra | In 1996, Jens Franke proved the equivalence of certain triangulated
categories possessing an Adams spectral sequence. One particular application of
this theorem is that the K_(p)-local stable homotopy category at an odd prime
can be described as the derived category of an abelian category. We explain
this proof from a topologist's point of view.
| math.AT | in 1996 jens franke proved the equivalence of certain triangulated categories possessing an adams spectral sequence one particular application of this theorem is that the k_plocal stable homotopy category at an odd prime can be described as the derived category of an abelian category we explain this proof from a topologists point of view | [['in', '1996', 'jens', 'franke', 'proved', 'the', 'equivalence', 'of', 'certain', 'triangulated', 'categories', 'possessing', 'an', 'adams', 'spectral', 'sequence', 'one', 'particular', 'application', 'of', 'this', 'theorem', 'is', 'that', 'the', 'k_plocal', 'stable', 'homotopy', 'category', 'at', 'an', 'odd', 'prime', 'can', 'be', 'described', 'as', 'the', 'derived', 'category', 'of', 'an', 'abelian', 'category', 'we', 'explain', 'this', 'proof', 'from', 'a', 'topologists', 'point', 'of', 'view']] | [-0.1374348922356687, 0.01811140247796343, -0.13973424056786354, 0.1291906707639875, -0.05148740916478413, -0.13896967635352026, -0.04017781050384252, 0.3213533509729637, -0.39044045884576106, -0.25155060312331273, 0.08820273015536023, -0.1568955277196235, -0.1129539196069042, 0.1828854298564019, -0.2569825813105261, -0.12178575578878668, 0.06813544300988454, 0.1053960451218127, -0.00896842254291254, -0.25636578009774286, 0.42607168259995953, -0.013704567199090013, 0.23379791599863556, 0.024448566190484498, 0.07299731149234706, 0.006667942550309279, 0.014754645871343437, 0.0021477922521255634, -0.13706937122562388, 0.13438098098116893, 0.34497104557576, 0.05073539226281422, 0.20494001549970428, -0.3144119658886834, -0.08188377993388309, 0.17645590003855802, 0.12287524830618943, 0.03668658423271996, -0.04513516654777858, -0.3163818654569763, 0.14418311912083515, -0.2383699115706366, -0.16037212990017402, -0.059535785034919776, 0.06428350356441957, 0.0011051186722599799, -0.2403634048446461, -0.09567382450957128, 0.161345564260113, 0.15942762866271315, -0.12323860537812666, -0.06810515173021015, -0.07334130789429226, 0.10939533483340508, 0.0012766386908306569, 0.039760480264063786, 0.07348367731362858, -0.07869341558155914, -0.14753274098728542, 0.3219031886784015, -0.0400318579437832, -0.134208380020465, 0.135858503605791, -0.05401393027838181, -0.20790804819100434, 0.16622513377418122, -0.034679843781136525, 0.17731480636737412, -0.033428341115790385, 0.17880597695100867, -0.1851394593163773, 0.10302909764006338, 0.15422039549728786, 0.0016473153071409022, 0.17017754554075915, 0.13309624907991816, 0.02947289900233348, 0.1470341818445983, -0.018280893249471707, -0.03423069927979399, -0.35552787587598517, -0.1730039571929309, -0.168452976581951, 0.1733210471941641, -0.08971454588592881, -0.18927866689584874, 0.3653279202817767, 0.09358153240410266, 0.1516008783235318, 0.13870683827661667, 0.20084691062328164, 0.09474115638726356, 0.011708875333338423, 0.01284520118605104, 0.17652668734943425, 0.23235042136231507, 0.009759898784708369, -0.0379619572992885, -0.04597228643467167, 0.258406530669028] |
708.3037 | Multi-scale analysis of the electromagnetic self-force in a weak
gravitational field | We examine the motion of a charged particle in a weak gravitational field. In
addition to the Newtonian gravity exerted by a large central body, the particle
is subjected to an electromagnetic self-force that contains both a conservative
piece and a radiation-reaction piece. This toy problem shares many of the
features of the strong-field gravitational self-force problem, and it is
sufficiently simple that it can be solved exactly with numerical methods, and
approximately with analytical methods. We submit the equations of motion to a
multi-scale analysis, and we examine the roles of the conservative and
radiation-reaction pieces of the self-force. We show that the
radiation-reaction force drives secular changes in the orbit's semilatus rectum
and eccentricity, while the conservative force drives a secular regression of
the periapsis and affects the orbital time function; neglect of the
conservative term can hence give rise to an important phasing error. We next
examine what might be required in the formulation of a reliable adiabatic
approximation for the orbital evolution; this would capture all secular changes
in the orbit and discard all irrelevant oscillations. We conclude that such an
approximation would be very difficult to formulate without prior knowledge of
the exact solution.
| gr-qc | we examine the motion of a charged particle in a weak gravitational field in addition to the newtonian gravity exerted by a large central body the particle is subjected to an electromagnetic selfforce that contains both a conservative piece and a radiationreaction piece this toy problem shares many of the features of the strongfield gravitational selfforce problem and it is sufficiently simple that it can be solved exactly with numerical methods and approximately with analytical methods we submit the equations of motion to a multiscale analysis and we examine the roles of the conservative and radiationreaction pieces of the selfforce we show that the radiationreaction force drives secular changes in the orbits semilatus rectum and eccentricity while the conservative force drives a secular regression of the periapsis and affects the orbital time function neglect of the conservative term can hence give rise to an important phasing error we next examine what might be required in the formulation of a reliable adiabatic approximation for the orbital evolution this would capture all secular changes in the orbit and discard all irrelevant oscillations we conclude that such an approximation would be very difficult to formulate without prior knowledge of the exact solution | [['we', 'examine', 'the', 'motion', 'of', 'a', 'charged', 'particle', 'in', 'a', 'weak', 'gravitational', 'field', 'in', 'addition', 'to', 'the', 'newtonian', 'gravity', 'exerted', 'by', 'a', 'large', 'central', 'body', 'the', 'particle', 'is', 'subjected', 'to', 'an', 'electromagnetic', 'selfforce', 'that', 'contains', 'both', 'a', 'conservative', 'piece', 'and', 'a', 'radiationreaction', 'piece', 'this', 'toy', 'problem', 'shares', 'many', 'of', 'the', 'features', 'of', 'the', 'strongfield', 'gravitational', 'selfforce', 'problem', 'and', 'it', 'is', 'sufficiently', 'simple', 'that', 'it', 'can', 'be', 'solved', 'exactly', 'with', 'numerical', 'methods', 'and', 'approximately', 'with', 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708.3038 | f(R) Gravity with Torsion: The Metric-Affine Approach | The role of torsion in f(R) gravity is considered in the framework of
metric-affine formalism. We discuss the field equations in empty space and in
presence of perfect fluid matter taking into account the analogy with the
Palatini formalism. As a result, the extra curvature and torsion degrees of
freedom can be dealt as an effective scalar field of fully geometric origin.
From a cosmological point of view, such a geometric description could account
for the whole Dark Side of the Universe.
| gr-qc | the role of torsion in fr gravity is considered in the framework of metricaffine formalism we discuss the field equations in empty space and in presence of perfect fluid matter taking into account the analogy with the palatini formalism as a result the extra curvature and torsion degrees of freedom can be dealt as an effective scalar field of fully geometric origin from a cosmological point of view such a geometric description could account for the whole dark side of the universe | [['the', 'role', 'of', 'torsion', 'in', 'fr', 'gravity', 'is', 'considered', 'in', 'the', 'framework', 'of', 'metricaffine', 'formalism', 'we', 'discuss', 'the', 'field', 'equations', 'in', 'empty', 'space', 'and', 'in', 'presence', 'of', 'perfect', 'fluid', 'matter', 'taking', 'into', 'account', 'the', 'analogy', 'with', 'the', 'palatini', 'formalism', 'as', 'a', 'result', 'the', 'extra', 'curvature', 'and', 'torsion', 'degrees', 'of', 'freedom', 'can', 'be', 'dealt', 'as', 'an', 'effective', 'scalar', 'field', 'of', 'fully', 'geometric', 'origin', 'from', 'a', 'cosmological', 'point', 'of', 'view', 'such', 'a', 'geometric', 'description', 'could', 'account', 'for', 'the', 'whole', 'dark', 'side', 'of', 'the', 'universe']] | [-0.19007554055168863, 0.1129588867019842, -0.15190359083765254, 0.09814061176332804, -0.12247518209240786, -0.10721823859891695, -0.06810824893040174, 0.2678502123666609, -0.23507914529182017, -0.3242253975761009, 0.022807477751928495, -0.2009383115758438, -0.12717965526063357, 0.09353413348790349, -0.059734934338981784, -0.059098701925505315, -0.03524159374448085, 0.06430302727286046, -0.03859719827703041, -0.21429199866791507, 0.3516013449648531, 0.06115235522298551, 0.1927441171393162, 0.036817353656061175, 0.13223821514217957, 0.022500442363685223, -0.026866769281829277, 0.11566790232467522, -0.14445883650105537, 0.05669786462208211, 0.21457749559180583, 0.09031087260625166, 0.22779470398488297, -0.46514467746246513, -0.3082089130425962, 0.09742640611352171, 0.13178180785077373, 0.16525659435882983, -0.047992530551443736, -0.30826025307405647, 0.023840253394687684, -0.17541737817000688, -0.17126641427621064, -0.041653271923523125, -0.035742973962730566, -0.07895709208508091, -0.20365509358461856, 0.06816046570020262, 0.07049718383336212, 0.014294976947783696, -0.12720171987397097, -0.09567765845553722, -0.030038390251830582, 0.08354128997136907, 0.10523363287992231, 0.03566619099072385, 0.11776528252493136, -0.18542871004106795, -0.06044740958008688, 0.4571884904601952, -0.13203605791417564, -0.2373684395740672, 0.0861668011809631, -0.11945878871057819, -0.11507322950424945, 0.10061869963083597, 0.15388900881190215, 0.1132534533375647, -0.13964230010694847, 0.2171947077447662, -0.010331262970661245, 0.10223586469776531, 0.06496835684278844, 0.07915608994038094, 0.336948806715266, 0.11764096694135266, 0.011600025282127828, 0.11715150131452147, -0.029539112228809332, -0.15682683307563933, -0.42597821700136834, -0.22430014322881328, -0.13419951899431465, 0.07191881820241489, -0.17011398153639365, -0.1405719046583172, 0.3715299647017496, 0.10669190048597889, 0.14505890767635188, -0.014776105078209827, 0.2959043473777611, 0.07464126526185016, 0.02913490710098569, 0.035141751664213655, 0.2873948386120724, 0.19523115909272215, 0.05699532508861455, -0.2042852999846928, -0.04945862164334735, 0.06935582612073277] |
708.3039 | Exact Solution of Strongly Interacting Quasi-One-Dimensional Spinor Bose
Gases | We present an exact analytical solution of the fundamental system of
quasi-one-dimensional spin-1 bosons with infinite delta-repulsion. The
eigenfunctions are constructed from the wave functions of non-interacting
spinless fermions, based on Girardeau's Fermi-Bose mapping, and from the wave
functions of distinguishable spins. We show that the spinor bosons behave like
a compound of non-interacting spinless fermions and non-interacting
distinguishable spins. This duality is especially reflected in the spin
densities and the energy spectrum. We find that the momentum distribution of
the eigenstates depends on the symmetry of the spin function. Furthermore, we
discuss the splitting of the ground state multiplet in the regime of large but
finite repulsion.
| cond-mat.other | we present an exact analytical solution of the fundamental system of quasionedimensional spin1 bosons with infinite deltarepulsion the eigenfunctions are constructed from the wave functions of noninteracting spinless fermions based on girardeaus fermibose mapping and from the wave functions of distinguishable spins we show that the spinor bosons behave like a compound of noninteracting spinless fermions and noninteracting distinguishable spins this duality is especially reflected in the spin densities and the energy spectrum we find that the momentum distribution of the eigenstates depends on the symmetry of the spin function furthermore we discuss the splitting of the ground state multiplet in the regime of large but finite repulsion | [['we', 'present', 'an', 'exact', 'analytical', 'solution', 'of', 'the', 'fundamental', 'system', 'of', 'quasionedimensional', 'spin1', 'bosons', 'with', 'infinite', 'deltarepulsion', 'the', 'eigenfunctions', 'are', 'constructed', 'from', 'the', 'wave', 'functions', 'of', 'noninteracting', 'spinless', 'fermions', 'based', 'on', 'girardeaus', 'fermibose', 'mapping', 'and', 'from', 'the', 'wave', 'functions', 'of', 'distinguishable', 'spins', 'we', 'show', 'that', 'the', 'spinor', 'bosons', 'behave', 'like', 'a', 'compound', 'of', 'noninteracting', 'spinless', 'fermions', 'and', 'noninteracting', 'distinguishable', 'spins', 'this', 'duality', 'is', 'especially', 'reflected', 'in', 'the', 'spin', 'densities', 'and', 'the', 'energy', 'spectrum', 'we', 'find', 'that', 'the', 'momentum', 'distribution', 'of', 'the', 'eigenstates', 'depends', 'on', 'the', 'symmetry', 'of', 'the', 'spin', 'function', 'furthermore', 'we', 'discuss', 'the', 'splitting', 'of', 'the', 'ground', 'state', 'multiplet', 'in', 'the', 'regime', 'of', 'large', 'but', 'finite', 'repulsion']] | [-0.1837118825827351, 0.26140248504476554, -0.051894500947374606, 0.08726243513296837, -0.0008493064463173396, -0.1351725139620357, 0.008139662359728017, 0.32837826027491385, -0.19891903585989343, -0.21831703669974736, -0.012730007521181462, -0.34544034649522226, -0.09026256747865857, 0.1103020292123623, 0.11170853685726907, 0.044553989997116204, 0.032717828678019416, 0.04296359968824295, -0.15270594167566606, -0.2004211897163208, 0.36841190268615237, -0.025200307404047974, 0.28886702023968797, 0.06036909923793, 0.11096690417154231, 0.09575854916404063, 0.09985301390325076, -0.06736759453245969, -0.10737742127257151, 0.08058177272432318, 0.19141930437028826, 0.0037631182887843838, 0.13993771795496762, -0.42029716361697034, -0.15144328054075487, 0.08885715026669552, 0.19558019849507652, 0.16049843356796653, -0.0501186460687422, -0.3471030120990265, -0.04924300921401967, -0.20524288370996435, -0.1877965174800886, -0.06751618923393087, -0.03768913824411509, 0.04826448206728864, -0.21533995897239336, 0.14867336672043133, 0.056242593463997695, 0.030424060315224474, -0.1089529052407211, -0.12054405713815103, -0.07529967032790741, 0.07131078617351357, 0.06743342427441101, -0.014071091907272968, 0.09100595157632657, -0.1664380856341395, -0.09743979331280027, 0.38750086603773254, -0.11160305125647546, -0.24320039457519688, 0.20909559131582556, -0.19345913023174366, -0.10679792822991437, 0.10145434528310722, 0.12126729223946824, 0.11577314588624253, -0.12147716855821765, 0.15203620279566862, -0.10945863913821935, 0.16125855727173458, -0.0006173647478849531, 0.08979551678645277, 0.2626490486681322, 0.11990119413272521, 0.04885754802603727, 0.1969772004217745, -0.08024628486301506, -0.13464530551301263, -0.28235517310796776, -0.19365405687674986, -0.2850993754794804, 0.08164728801152407, -0.04286570551494576, -0.18734550643190045, 0.4316197252989024, 0.14546090752652316, 0.17972915821543364, 0.03573525886303772, 0.22746223179954234, 0.1958810773147183, 0.021393254477635164, 0.053723090597010595, 0.23469891857843253, 0.14362109459884395, 0.013319668529781505, -0.2908282734755052, -0.09628178731529652, 0.07331848819304919] |
708.304 | The evolution of stars in the Taurus-Auriga T association | In a recent study, individual parallaxes were determined for many stars of
the Taurus-Auriga T association that are members of the same moving group. We
use these new parallaxes to re-address the issue of the relationship between
classical T Tauri stars (CTTSs) and weak-emission line T Tauri stars (WTTSs).
With the available spectroscopic and photometric information for 72 individual
stars or stellar systems among the Taurus-Auriga objects with known parallaxes,
we derived reliable photospheric luminosities, mainly from the Ic magnitude of
these objects. We then studied the mass and age distributions of the stellar
sample, using pre-main sequence evolutionary models to determine the basic
properties of the stellar sample. Statistical tests and Monte Carlo simulations
were then applied to studying the properties of the two T Tauri subclasses. We
find that the probability of CTTS and WTTS samples being drawn from the same
parental age and mass distributions is low; CTTSs are, on average, younger than
WTTSs. They are also less massive, but this is due to selection effects. The
observed mass and age distributions of both T Tauri subclasses can be
understood in the framework of a simple disk evolution model, assuming that the
CTTSs evolve into WTTSs when their disks are fully accreted by the stars.
According to this empirical model, the average disk lifetime in Taurus-Auriga
is 4 10**6 (Mstar/Msun)**0.75 yr.
| astro-ph | in a recent study individual parallaxes were determined for many stars of the taurusauriga t association that are members of the same moving group we use these new parallaxes to readdress the issue of the relationship between classical t tauri stars cttss and weakemission line t tauri stars wttss with the available spectroscopic and photometric information for 72 individual stars or stellar systems among the taurusauriga objects with known parallaxes we derived reliable photospheric luminosities mainly from the ic magnitude of these objects we then studied the mass and age distributions of the stellar sample using premain sequence evolutionary models to determine the basic properties of the stellar sample statistical tests and monte carlo simulations were then applied to studying the properties of the two t tauri subclasses we find that the probability of ctts and wtts samples being drawn from the same parental age and mass distributions is low cttss are on average younger than wttss they are also less massive but this is due to selection effects the observed mass and age distributions of both t tauri subclasses can be understood in the framework of a simple disk evolution model assuming that the cttss evolve into wttss when their disks are fully accreted by the stars according to this empirical model the average disk lifetime in taurusauriga is 4 106 mstarmsun075 yr | [['in', 'a', 'recent', 'study', 'individual', 'parallaxes', 'were', 'determined', 'for', 'many', 'stars', 'of', 'the', 'taurusauriga', 't', 'association', 'that', 'are', 'members', 'of', 'the', 'same', 'moving', 'group', 'we', 'use', 'these', 'new', 'parallaxes', 'to', 'readdress', 'the', 'issue', 'of', 'the', 'relationship', 'between', 'classical', 't', 'tauri', 'stars', 'cttss', 'and', 'weakemission', 'line', 't', 'tauri', 'stars', 'wttss', 'with', 'the', 'available', 'spectroscopic', 'and', 'photometric', 'information', 'for', '72', 'individual', 'stars', 'or', 'stellar', 'systems', 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'mass', 'and', 'age', 'distributions', 'of', 'both', 't', 'tauri', 'subclasses', 'can', 'be', 'understood', 'in', 'the', 'framework', 'of', 'a', 'simple', 'disk', 'evolution', 'model', 'assuming', 'that', 'the', 'cttss', 'evolve', 'into', 'wttss', 'when', 'their', 'disks', 'are', 'fully', 'accreted', 'by', 'the', 'stars', 'according', 'to', 'this', 'empirical', 'model', 'the', 'average', 'disk', 'lifetime', 'in', 'taurusauriga', 'is', '4', '106', 'mstarmsun075', 'yr']] | [-0.026828666300107745, 0.1639598859087752, -0.07566141734462735, 0.14143897924883367, -0.09885558156785242, -0.07453027469076784, 0.10560698180828523, 0.4601358354024823, -0.20198152410994064, -0.3744397296824998, 0.04751085433190179, -0.2878874422055189, 0.012836720417525135, 0.17871242320564923, -0.06987326491766112, -0.0026192341575131755, 0.11099145545168976, -0.02494737026260773, -0.054154493137588515, -0.287322529379671, 0.31016041967817354, 0.005691170347896258, 0.10576511371928797, -0.12169832743666732, 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708.3041 | Convergence Rate of K-Step Maximum Likelihood Estimate in Semiparametric
Models | We suggest an iterative approach to computing K-step maximum likelihood
estimates (MLE) of the parametric components in semiparametric models based on
their profile likelihoods. The higher order convergence rate of K-step MLE
mainly depends on the precision of its initial estimate and the convergence
rate of the nuisance functional parameter in the semiparametric model.
Moreover, we can show that the K-step MLE is as asymptotically efficient as the
regular MLE after a finite number of iterative steps. Our theory is verified
for several specific semiparametric models. Simulation studies are also
presented to support these theoretical results.
| math.ST stat.TH | we suggest an iterative approach to computing kstep maximum likelihood estimates mle of the parametric components in semiparametric models based on their profile likelihoods the higher order convergence rate of kstep mle mainly depends on the precision of its initial estimate and the convergence rate of the nuisance functional parameter in the semiparametric model moreover we can show that the kstep mle is as asymptotically efficient as the regular mle after a finite number of iterative steps our theory is verified for several specific semiparametric models simulation studies are also presented to support these theoretical results | [['we', 'suggest', 'an', 'iterative', 'approach', 'to', 'computing', 'kstep', 'maximum', 'likelihood', 'estimates', 'mle', 'of', 'the', 'parametric', 'components', 'in', 'semiparametric', 'models', 'based', 'on', 'their', 'profile', 'likelihoods', 'the', 'higher', 'order', 'convergence', 'rate', 'of', 'kstep', 'mle', 'mainly', 'depends', 'on', 'the', 'precision', 'of', 'its', 'initial', 'estimate', 'and', 'the', 'convergence', 'rate', 'of', 'the', 'nuisance', 'functional', 'parameter', 'in', 'the', 'semiparametric', 'model', 'moreover', 'we', 'can', 'show', 'that', 'the', 'kstep', 'mle', 'is', 'as', 'asymptotically', 'efficient', 'as', 'the', 'regular', 'mle', 'after', 'a', 'finite', 'number', 'of', 'iterative', 'steps', 'our', 'theory', 'is', 'verified', 'for', 'several', 'specific', 'semiparametric', 'models', 'simulation', 'studies', 'are', 'also', 'presented', 'to', 'support', 'these', 'theoretical', 'results']] | [-0.06267517094966024, 0.019034059389772057, -0.11397095995683533, 0.11053436753233352, -0.06635391987704982, -0.13418765109963715, 0.05752679606060459, 0.4087171840365045, -0.21753652510233223, -0.2688478527707048, 0.17135515196666043, -0.23726562884015343, -0.13114850615177906, 0.23291656296108462, -0.1012992280254063, 0.13695497419818517, 0.072757201094646, 0.04275192943168804, -0.089272216186752, -0.33216092418782256, 0.25441422425501514, 0.08720592635412079, 0.32280382340589614, -0.012649427580375535, 0.10997443318774458, -0.026858607767887104, -0.013112943697099885, -0.000494566474420329, -0.18226458653505992, 0.1375702281463115, 0.22445504425900253, 0.20180983981117606, 0.33744610419186455, -0.3683329200139269, -0.21928279670828488, 0.11796340282793001, 0.18883919930643364, 0.10449261382260981, -0.013466414299424892, -0.21578474391329414, 0.10491679504715042, -0.1795493091243164, -0.09836556913796812, -0.12406330312175366, -0.061331094654936656, 0.06034487898189885, -0.3556707652278419, 0.1469444452835281, 0.08475977581110783, 0.039137104720187686, -0.020142133445915533, -0.17069994630583096, -0.014386008675501216, 0.03922265814132212, 0.09152946155882091, -0.0386539407093854, 0.10669569484889507, -0.10785984999771851, -0.08080617109468828, 0.25495353935730236, -0.06914729609100807, -0.21985011404224983, 0.1546644943712939, -0.11891200053893651, -0.16161583088493595, 0.09900414883062088, 0.20504344766959548, 0.16567162872524932, -0.11585063903233579, 0.08632732864680293, 0.0043159011426420575, 0.1559514853094394, -0.036059034362551756, -0.04235914855962619, 0.12112401866761502, 0.17243004845901547, 0.11104722901829216, 0.09506657287177707, -0.0992468770200503, -0.08817884310459097, -0.32192643033340573, -0.13788523169932887, -0.23330584382347297, -0.04200443122196399, -0.22245354136475726, -0.21197641820375188, 0.3864346837120441, 0.20850285022136936, 0.18962599163448127, 0.15229499619454145, 0.3032355830121863, 0.1855036645756627, -0.033087369052130576, 0.09652466642486009, 0.22625948414012478, 0.15706636491813697, -0.039978858578251675, -0.21908299976106113, 0.13320366339515508, 0.07727315738884499] |
708.3042 | Neutron channelling in a magnetic tube trap | Neutron channelling in a magnetic tube trap is discussed
| nucl-th | neutron channelling in a magnetic tube trap is discussed | [['neutron', 'channelling', 'in', 'a', 'magnetic', 'tube', 'trap', 'is', 'discussed']] | [-0.20840347868700823, 0.37940680152840084, 0.04872251467572318, 0.11931508785993275, -0.034032366135054164, -0.13874716761832437, -0.0338687544895543, 0.45055052306916976, -0.11711009353813198, -0.20104269310832024, 0.02143269470737626, -0.23057773926605782, 0.08374471755491363, 0.29559824036227333, -0.006053785793483257, 0.026439696550369263, 0.06372736170629247, 0.1217209291126993, -0.004369000179900063, -0.1060516727803689, 0.2264571434093846, 0.13481771449247995, 0.29744496362076867, 0.18085559933549827, 0.028413019039564662, -0.014059390872716904, 0.11173574833406343, 0.04223574325442314, -0.15282915729201502, -0.04151653449258043, 0.1893041299449073, -0.06539790456493695, 0.10356959700584412, -0.5780625726199813, -0.2642515152692795, -0.023691161225239437, 0.164372771150536, 0.10771206600798501, -0.1633553190363778, -0.23809412121772766, 0.02011108657138215, -0.19639463971058527, -0.20136037406822047, -0.01860009464952681, 0.09532890013522571, 0.10315128767655955, -0.25938932763205635, -0.00994293847017818, 0.09590428591602379, 0.06397626093692249, -0.23793202204008898, -0.0508505834473504, 0.09998397197988299, -0.08564516845055753, 0.11257646219908363, 0.17609618604183197, 0.3142790384590626, -0.08100648576186763, 0.0009089437209897571, 0.3243400678038597, 0.035048080815209284, -0.13462393979231516, -0.007519983996947606, -0.31017852088229525, -0.011262379586696625, 0.18490391224622726, 0.09840643985403909, 0.06272690494855244, -0.19509364912907282, 0.01708574468890826, -0.04743793834414747, 0.12028764747083187, 0.19026504581173262, -0.12186526589923435, 0.418424882615606, 0.3953757840726111, -0.0034349974658754137, 0.2754143476486206, -0.29373715942104656, 0.033588425980673894, -0.2954479368507034, -0.1089478193057908, -0.18228772944874233, 0.0033200173121359614, 0.0035957563668489456, -0.21205491800275114, 0.3426833483907912, -0.015275995764467452, 0.08255497614542644, -0.2827327350775401, 0.33547575026750565, 0.09176420958505736, 0.05579273568259345, 0.017560675998942718, 0.36546292073196834, 0.38261810938517254, 0.30686407287915546, -0.3602268029935658, -0.06317304643905824, 0.03658249816443357] |
708.3043 | The dark nature of GRB 051022 and its host galaxy | We present multiwavelength (X-ray/optical/near-infrared/millimetre)
observations of GRB 051022 between 2.5 hours and ~1.15 yr after the event. It
is the most intense gamma-ray burst (~ 10^-4 erg cm^-2) detected by HETE-2,
with the exception of the nearby GRB 030329. Optical and near infrared
observations did not detect the afterglow despite a strong afterglow at X-ray
wavelengths. Millimetre observations at Plateau de Bure (PdB) detected a source
and a flare, confirming the association of this event with a moderately bright
(R = 21.5) galaxy. Spectroscopic observations of this galaxy show strong [O
II], Hbeta and [O III] emission lines at a redshift of 0.809. The spectral
energy distribution of the galaxy implies Av (rest frame) = 1.0 and a starburst
occuring ~ 25 Myr ago, during which the star-forming-rate reached >= 25
Msun/yr. In conjunction with the spatial extent (~ 1'') it suggests a very
luminous (Mv = - 21.8) blue compact galaxy, for which we also find with Z Zsun.
The X-ray spectrum shows evidence of considerable absorption by neutral gas
with NH, X-ray = 3.47(+0.48/-0.47) x 10^22 cm^-2 (rest frame). Absorption by
dust in the host galaxy at z = 0.809 certainly cannot account for the
non-detection of the optical afterglow, unless the dust-to-gas ratio is quite
different than that seen in our Galaxy (i.e. large dust grains). It is likely
that the afterglow of the dark GRB 051022 was extinguished along the line of
sight by an obscured, dense star forming region in a molecular cloud within the
parent host galaxy. This galaxy is different from most GRB hosts being brighter
than L* by a factor of 3. We have also derived a SFR ~ 50 Msun/yr and predict
that this host galaxy will be detected at sub-mm wavelengths.
| astro-ph | we present multiwavelength xrayopticalnearinfraredmillimetre observations of grb 051022 between 25 hours and 115 yr after the event it is the most intense gammaray burst 104 erg cm2 detected by hete2 with the exception of the nearby grb 030329 optical and near infrared observations did not detect the afterglow despite a strong afterglow at xray wavelengths millimetre observations at plateau de bure pdb detected a source and a flare confirming the association of this event with a moderately bright r 215 galaxy spectroscopic observations of this galaxy show strong o ii hbeta and o iii emission lines at a redshift of 0809 the spectral energy distribution of the galaxy implies av rest frame 10 and a starburst occuring 25 myr ago during which the starformingrate reached 25 msunyr in conjunction with the spatial extent 1 it suggests a very luminous mv 218 blue compact galaxy for which we also find with z zsun the xray spectrum shows evidence of considerable absorption by neutral gas with nh xray 347048047 x 1022 cm2 rest frame absorption by dust in the host galaxy at z 0809 certainly cannot account for the nondetection of the optical afterglow unless the dusttogas ratio is quite different than that seen in our galaxy ie large dust grains it is likely that the afterglow of the dark grb 051022 was extinguished along the line of sight by an obscured dense star forming region in a molecular cloud within the parent host galaxy this galaxy is different from most grb hosts being brighter than l by a factor of 3 we have also derived a sfr 50 msunyr and predict that this host galaxy will be detected at submm wavelengths | [['we', 'present', 'multiwavelength', 'xrayopticalnearinfraredmillimetre', 'observations', 'of', 'grb', '051022', 'between', '25', 'hours', 'and', '115', 'yr', 'after', 'the', 'event', 'it', 'is', 'the', 'most', 'intense', 'gammaray', 'burst', '104', 'erg', 'cm2', 'detected', 'by', 'hete2', 'with', 'the', 'exception', 'of', 'the', 'nearby', 'grb', 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708.3044 | Nondegenerate 3D complex Euclidean superintegrable systems and algebraic
varieties | A classical (or quantum) second order superintegrable system is an integrable
n-dimensional Hamiltonian system with potential that admits 2n-1 functionally
independent second order constants of the motion polynomial in the momenta, the
maximum possible. Such systems have remarkable properties: multi-integrability
and multi-separability, an algebra of higher order symmetries whose
representation theory yields spectral information about the Schroedinger
operator, deep connections with special functions and with QES systems. Here we
announce a complete classification of nondegenerate (i.e., 4-parameter)
potentials for complex Euclidean 3-space. We characterize the possible
superintegrable systems as points on an algebraic variety in 10 variables
subject to six quadratic polynomial constraints. The Euclidean group acts on
the variety such that two points determine the same superintegrable system if
and only if they lie on the same leaf of the foliation. There are exactly 10
nondegenerate potentials.
| math-ph math.MP | a classical or quantum second order superintegrable system is an integrable ndimensional hamiltonian system with potential that admits 2n1 functionally independent second order constants of the motion polynomial in the momenta the maximum possible such systems have remarkable properties multiintegrability and multiseparability an algebra of higher order symmetries whose representation theory yields spectral information about the schroedinger operator deep connections with special functions and with qes systems here we announce a complete classification of nondegenerate ie 4parameter potentials for complex euclidean 3space we characterize the possible superintegrable systems as points on an algebraic variety in 10 variables subject to six quadratic polynomial constraints the euclidean group acts on the variety such that two points determine the same superintegrable system if and only if they lie on the same leaf of the foliation there are exactly 10 nondegenerate potentials | [['a', 'classical', 'or', 'quantum', 'second', 'order', 'superintegrable', 'system', 'is', 'an', 'integrable', 'ndimensional', 'hamiltonian', 'system', 'with', 'potential', 'that', 'admits', '2n1', 'functionally', 'independent', 'second', 'order', 'constants', 'of', 'the', 'motion', 'polynomial', 'in', 'the', 'momenta', 'the', 'maximum', 'possible', 'such', 'systems', 'have', 'remarkable', 'properties', 'multiintegrability', 'and', 'multiseparability', 'an', 'algebra', 'of', 'higher', 'order', 'symmetries', 'whose', 'representation', 'theory', 'yields', 'spectral', 'information', 'about', 'the', 'schroedinger', 'operator', 'deep', 'connections', 'with', 'special', 'functions', 'and', 'with', 'qes', 'systems', 'here', 'we', 'announce', 'a', 'complete', 'classification', 'of', 'nondegenerate', 'ie', '4parameter', 'potentials', 'for', 'complex', 'euclidean', '3space', 'we', 'characterize', 'the', 'possible', 'superintegrable', 'systems', 'as', 'points', 'on', 'an', 'algebraic', 'variety', 'in', '10', 'variables', 'subject', 'to', 'six', 'quadratic', 'polynomial', 'constraints', 'the', 'euclidean', 'group', 'acts', 'on', 'the', 'variety', 'such', 'that', 'two', 'points', 'determine', 'the', 'same', 'superintegrable', 'system', 'if', 'and', 'only', 'if', 'they', 'lie', 'on', 'the', 'same', 'leaf', 'of', 'the', 'foliation', 'there', 'are', 'exactly', '10', 'nondegenerate', 'potentials']] | [-0.1948079841558135, 0.07971727971043217, -0.03139642432984645, 0.034395876069498815, -0.10508325089612146, -0.1842044959062316, -0.03295865330172118, 0.3371401214904159, -0.29474689254034175, -0.2351467082596445, 0.10364762837675665, -0.32138794716481583, -0.19389317362963554, 0.18750483334492757, -0.06601297580314133, 0.06174595672365305, 0.06007504429715774, 0.14472186423151542, -0.1288970508221809, -0.3056080232299592, 0.38660726102449705, -0.046600526099536826, 0.17213921607505991, -0.005669946061758695, 0.17701004552281033, 0.028170824242946115, 0.059392356391941764, -0.020769930138748928, -0.1200194146632205, 0.08890571939439451, 0.2308793524959988, 0.06471326756736147, 0.19242918826163793, -0.3762464881024874, -0.17386110273808458, 0.19662271897532863, 0.14278907636707364, 0.061610031405626965, 0.005354049007992947, -0.261058478891496, 0.03656711605849954, -0.14270690481525158, -0.209778054470764, -0.1120326861630391, 0.0637180178704923, 0.010821983968944418, -0.20471483169218702, 0.02463151334723743, 0.09799026832134075, 0.10943419776557789, -0.098573681650289, -0.0930707361005301, -0.07320763768431099, 0.0950110565945778, -0.06101688971899341, 0.04991058811093307, 0.06280590366762485, -0.07228056965208864, -0.1635683450038905, 0.4269744849621053, -0.021258431004978935, -0.27911139093679344, 0.19324574691590166, -0.15336825457625908, -0.16593375379885852, 0.11906265836280437, 0.1551680958891002, 0.1257527276200589, -0.15140677202003497, 0.14745185249459583, -0.03654644537010115, 0.14221533788640026, 0.07291944694440186, 0.04960356444038831, 0.17285124642475352, 0.08213446524850752, 0.10763928339558307, 0.09252685073246486, 0.023913848817171734, -0.132784691996988, -0.3263675282032902, -0.14345841708654253, -0.1822276535872234, 0.10020552835185896, -0.16217157644371377, -0.17835908885841278, 0.4105132802246805, 0.05674061309129856, 0.16560154778536165, 0.04956098567918759, 0.2043631960481514, 0.14032867184099163, 0.08146052848442328, 0.08813248713752322, 0.20200192251915697, 0.16804332140302897, 0.0152999004213153, -0.15582945858541347, -0.0731293665615665, 0.11714630192281665] |
708.3045 | From the BRST invariant Hamiltonian to the Field-Antifield Formalism | We study the relation between the lagrangian field-antifield formalism and
the BRST invariant phase space formulation of gauge theories. Starting from the
Batalin-Fradkin-Vilkovisky unitarized action, we demonstrate in a deductive way
the equivalence of the phase space, and the lagrangian field-antifield
partition functions for the case of irreducible first rank theories.
| hep-th | we study the relation between the lagrangian fieldantifield formalism and the brst invariant phase space formulation of gauge theories starting from the batalinfradkinvilkovisky unitarized action we demonstrate in a deductive way the equivalence of the phase space and the lagrangian fieldantifield partition functions for the case of irreducible first rank theories | [['we', 'study', 'the', 'relation', 'between', 'the', 'lagrangian', 'fieldantifield', 'formalism', 'and', 'the', 'brst', 'invariant', 'phase', 'space', 'formulation', 'of', 'gauge', 'theories', 'starting', 'from', 'the', 'batalinfradkinvilkovisky', 'unitarized', 'action', 'we', 'demonstrate', 'in', 'a', 'deductive', 'way', 'the', 'equivalence', 'of', 'the', 'phase', 'space', 'and', 'the', 'lagrangian', 'fieldantifield', 'partition', 'functions', 'for', 'the', 'case', 'of', 'irreducible', 'first', 'rank', 'theories']] | [-0.15177481930118566, 0.14258315325166812, -0.160630589752805, 0.10579496023117327, -0.08162872006605361, -0.061389735927257466, 0.019763669072120797, 0.31266391211572814, -0.26395518449591654, -0.24215082385960748, -0.016431957056435447, -0.22415967676423343, -0.24184387907678007, 0.04575626192358779, -0.04315301392446546, 0.04728122190663628, -0.015287573111480941, 0.04474646970629692, -0.2117767628720578, -0.20054850499967442, 0.4128498033273454, -0.06190044959714892, 0.25189796963012684, 0.011817300418282257, 0.16976410570536174, 0.08669271037055581, -0.009160002373962426, -0.009743649897156465, -0.11615623004150157, 0.0998819549294079, 0.2449253409297443, 0.12504236306995153, 0.12883883600543236, -0.38286668401868906, -0.16069209606697163, 0.10296693979305964, 0.09549600436516545, 0.12568697567079581, 0.025614861471980225, -0.34170712679898474, 0.005447873005680009, -0.2343565690897259, -0.1511221981045845, -0.1490083177409628, -0.011069255445024693, -0.14612543086667418, -0.22444007945630481, 0.02048185720638025, 0.01215798318313033, 0.0839935989557382, -0.13511071018144197, -0.046171575127279055, -0.06870143514528286, 0.053342288935228306, 0.05463927903888272, 0.10170596441272281, 0.11290078127172355, -0.14876260113098896, -0.10150434799930629, 0.4386222698342274, -0.06799150996056258, -0.26465930594313963, 0.11823040442358629, -0.10549949675652326, -0.2250178264107044, 0.05050531529830586, 0.08869156031412821, 0.20502656266405977, -0.1477013175174886, 0.2657403319174716, -0.03750958576725394, 0.09421084698873992, 0.052030639558592266, 0.03760493932036208, 0.17061789621434667, 0.07585707124249608, 0.03482082497109385, 0.138524492992563, 0.0309400972636307, -0.18269221079261863, -0.4552402573765493, -0.19174316657803253, -0.09724799859081852, 0.019046646095447095, -0.12994938349412918, -0.11795655866244845, 0.41243786143832933, 0.156679918332135, 0.10876196357147659, 0.16281876660079933, 0.24584720239919775, 0.14389845463629886, 0.048304915172504445, -0.0008711584925870685, 0.193748803151881, 0.229811951134573, 0.02368897692683865, -0.23404432812650852, -0.1269865449901451, 0.29214922906648294] |
708.3046 | Metric fluctuations of an evaporating black hole from back reaction of
stress tensor fluctuations | This paper delineates the first steps in a systematic quantitative study of
the spacetime fluctuations induced by quantum fields in an evaporating black
hole under the stochastic gravity program. The central object of interest is
the noise kernel, which is the symmetrized two-point quantum correlation
function of the stress tensor operator. As a concrete example we apply it to
the study of the spherically-symmetric sector of metric perturbations around an
evaporating black hole background geometry. For macroscopic black holes we find
that those fluctuations grow and eventually become important when considering
sufficiently long periods of time (of the order of the evaporation time), but
well before the Planckian regime is reached. In addition, the assumption of a
simple correlation between the fluctuations of the energy flux crossing the
horizon and far from it, which was made in earlier work on
spherically-symmetric induced fluctuations, is carefully scrutinized and found
to be invalid. Our analysis suggests the existence of an infinite amplitude for
the fluctuations when trying to localize the horizon as a three-dimensional
hypersurface, as in the classical case, and, as a consequence, a more accurate
picture of the horizon as possessing a finite effective width due to quantum
fluctuations. This is supported by a systematic analysis of the noise kernel in
curved spacetime smeared with different functions under different conditions,
the details are collected in the appendices. This case study shows a pathway
for probing quantum metric fluctuations near the horizon and understanding
their physical meaning.
| gr-qc | this paper delineates the first steps in a systematic quantitative study of the spacetime fluctuations induced by quantum fields in an evaporating black hole under the stochastic gravity program the central object of interest is the noise kernel which is the symmetrized twopoint quantum correlation function of the stress tensor operator as a concrete example we apply it to the study of the sphericallysymmetric sector of metric perturbations around an evaporating black hole background geometry for macroscopic black holes we find that those fluctuations grow and eventually become important when considering sufficiently long periods of time of the order of the evaporation time but well before the planckian regime is reached in addition the assumption of a simple correlation between the fluctuations of the energy flux crossing the horizon and far from it which was made in earlier work on sphericallysymmetric induced fluctuations is carefully scrutinized and found to be invalid our analysis suggests the existence of an infinite amplitude for the fluctuations when trying to localize the horizon as a threedimensional hypersurface as in the classical case and as a consequence a more accurate picture of the horizon as possessing a finite effective width due to quantum fluctuations this is supported by a systematic analysis of the noise kernel in curved spacetime smeared with different functions under different conditions the details are collected in the appendices this case study shows a pathway for probing quantum metric fluctuations near the horizon and understanding their physical meaning | [['this', 'paper', 'delineates', 'the', 'first', 'steps', 'in', 'a', 'systematic', 'quantitative', 'study', 'of', 'the', 'spacetime', 'fluctuations', 'induced', 'by', 'quantum', 'fields', 'in', 'an', 'evaporating', 'black', 'hole', 'under', 'the', 'stochastic', 'gravity', 'program', 'the', 'central', 'object', 'of', 'interest', 'is', 'the', 'noise', 'kernel', 'which', 'is', 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'carefully', 'scrutinized', 'and', 'found', 'to', 'be', 'invalid', 'our', 'analysis', 'suggests', 'the', 'existence', 'of', 'an', 'infinite', 'amplitude', 'for', 'the', 'fluctuations', 'when', 'trying', 'to', 'localize', 'the', 'horizon', 'as', 'a', 'threedimensional', 'hypersurface', 'as', 'in', 'the', 'classical', 'case', 'and', 'as', 'a', 'consequence', 'a', 'more', 'accurate', 'picture', 'of', 'the', 'horizon', 'as', 'possessing', 'a', 'finite', 'effective', 'width', 'due', 'to', 'quantum', 'fluctuations', 'this', 'is', 'supported', 'by', 'a', 'systematic', 'analysis', 'of', 'the', 'noise', 'kernel', 'in', 'curved', 'spacetime', 'smeared', 'with', 'different', 'functions', 'under', 'different', 'conditions', 'the', 'details', 'are', 'collected', 'in', 'the', 'appendices', 'this', 'case', 'study', 'shows', 'a', 'pathway', 'for', 'probing', 'quantum', 'metric', 'fluctuations', 'near', 'the', 'horizon', 'and', 'understanding', 'their', 'physical', 'meaning']] | [-0.13216988177831868, 0.14252464078257676, -0.1223177191748367, 0.12289874481247375, -0.029212031345928043, -0.08558918416714939, -0.001075127591261625, 0.31331097707247013, -0.2222732922584727, -0.28103338798926386, 0.11476606358225055, -0.2862200582068938, -0.13416230623142764, 0.1756849120696628, -0.03736882458622681, 0.03578096974690301, 0.018238575284831166, 0.05264542485981029, -0.07582014182541268, -0.2076623307643231, 0.35724700165238626, 0.12913340719500027, 0.26236114172052927, 0.0482521483824187, 0.0815078587762489, 0.0038023931807194783, -0.01824385948607895, 0.07907409056296148, -0.13217394385119258, 0.0453869850465619, 0.21818673284742102, 0.06898822394441964, 0.2580435329582542, -0.4303625850006938, -0.2386528603141991, 0.09637052618625869, 0.13065108188820296, 0.15880564312976822, -0.045169009704332574, -0.2865859954939716, 0.05007123091916849, -0.1595730294730908, -0.169173448157262, -0.04173818124908712, 0.058236062053469866, -0.04682223575877273, -0.21849038688053293, 0.10928087350162317, 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0.12444954735654731, 0.11558787554703139, -0.22304611177490344, 0.025468160354767025, 0.037022679794307164] |
708.3047 | High energy neutrino yields from astrophysical sources II: Magnetized
sources | We calculate the yield of high energy neutrinos produced in astrophysical
sources for arbitrary interaction depths $\tau_0$ and magnetic field strengths
$B$. We take into account energy loss processes like synchrotron radiation and
diffusion of charged particles in turbulent magnetic fields as well as the
scattering of secondaries on background photons and the direct production of
charm neutrinos. Meson-photon interactions are simulated with an extended
version of the SOPHIA model. Diffusion leads to an increased path-length before
protons leave the source of size R_s and therefore magnetized sources lose
their transparency below the energy $E\sim 10^{18}{\rm eV} (R_s/{\rm pc})
(B/{\rm mG}) \tau_0^{1/\alpha}$, with $\alpha=1/3$ and 1 for Kolmogorov and
Bohm diffusion, respectively. Moreover, the neutrino flux is suppressed above
the energy where synchrotron energy losses become important for charged
particles. As a consequence, the energy spectrum and the flavor composition of
neutrinos are strongly modified both at low and high energies even for sources
with $\tau_0\lsim 1$.
| astro-ph hep-ph | we calculate the yield of high energy neutrinos produced in astrophysical sources for arbitrary interaction depths tau_0 and magnetic field strengths b we take into account energy loss processes like synchrotron radiation and diffusion of charged particles in turbulent magnetic fields as well as the scattering of secondaries on background photons and the direct production of charm neutrinos mesonphoton interactions are simulated with an extended version of the sophia model diffusion leads to an increased pathlength before protons leave the source of size r_s and therefore magnetized sources lose their transparency below the energy esim 1018rm ev r_srm pc brm mg tau_01alpha with alpha13 and 1 for kolmogorov and bohm diffusion respectively moreover the neutrino flux is suppressed above the energy where synchrotron energy losses become important for charged particles as a consequence the energy spectrum and the flavor composition of neutrinos are strongly modified both at low and high energies even for sources with tau_0lsim 1 | [['we', 'calculate', 'the', 'yield', 'of', 'high', 'energy', 'neutrinos', 'produced', 'in', 'astrophysical', 'sources', 'for', 'arbitrary', 'interaction', 'depths', 'tau_0', 'and', 'magnetic', 'field', 'strengths', 'b', 'we', 'take', 'into', 'account', 'energy', 'loss', 'processes', 'like', 'synchrotron', 'radiation', 'and', 'diffusion', 'of', 'charged', 'particles', 'in', 'turbulent', 'magnetic', 'fields', 'as', 'well', 'as', 'the', 'scattering', 'of', 'secondaries', 'on', 'background', 'photons', 'and', 'the', 'direct', 'production', 'of', 'charm', 'neutrinos', 'mesonphoton', 'interactions', 'are', 'simulated', 'with', 'an', 'extended', 'version', 'of', 'the', 'sophia', 'model', 'diffusion', 'leads', 'to', 'an', 'increased', 'pathlength', 'before', 'protons', 'leave', 'the', 'source', 'of', 'size', 'r_s', 'and', 'therefore', 'magnetized', 'sources', 'lose', 'their', 'transparency', 'below', 'the', 'energy', 'esim', '1018rm', 'ev', 'r_srm', 'pc', 'brm', 'mg', 'tau_01alpha', 'with', 'alpha13', 'and', '1', 'for', 'kolmogorov', 'and', 'bohm', 'diffusion', 'respectively', 'moreover', 'the', 'neutrino', 'flux', 'is', 'suppressed', 'above', 'the', 'energy', 'where', 'synchrotron', 'energy', 'losses', 'become', 'important', 'for', 'charged', 'particles', 'as', 'a', 'consequence', 'the', 'energy', 'spectrum', 'and', 'the', 'flavor', 'composition', 'of', 'neutrinos', 'are', 'strongly', 'modified', 'both', 'at', 'low', 'and', 'high', 'energies', 'even', 'for', 'sources', 'with', 'tau_0lsim', '1']] | [-0.0658980060624139, 0.29600678259495555, 0.0019875196390785276, 0.16969526227368342, -0.001224241241992962, -0.11181936866093066, 0.0006095375602824554, 0.37226222511981766, -0.2401148047157368, -0.3588183196441781, -0.007270615453261041, -0.33950872775017016, 0.08106878797914233, 0.18480800245212572, 0.07543079750912805, -0.039167391364612884, 0.03865577627814585, 0.007895607029598567, 0.0061455597603438245, -0.1435060506311035, 0.29558016155365735, 0.17877738104171811, 0.21870651633268404, 0.13874973042477523, 0.0925876046132837, -0.008369591678943364, -0.008388026822884117, -0.011295746765550107, -0.09517428035126818, 0.014465666367041488, 0.16827005817171847, 0.04222987108758741, 0.1435816115549495, -0.41996474164808467, -0.23504680295985553, 0.12338757447658047, 0.1499431537193877, 0.03997908785578705, -0.0751282136909844, -0.26143220833863223, 0.054924093346081435, -0.1691401501096064, -0.1368339463497602, -0.009764043805039218, 0.009354636719029757, 0.04170933686977913, -0.28919126960719305, 0.14147843835094281, 0.026110308043914097, 0.003962825246215347, -0.11915227663402836, -0.1687644857522701, -0.03848038386974123, 0.050498728231797296, 0.10138771938114997, 0.010340175378106295, 0.1859202112071216, -0.16495777473094003, -0.0702556639669403, 0.4074352466531338, -0.07983730158077613, -0.1191765625690741, 0.1843647862363967, -0.16722913960054997, -0.07443625172299724, 0.22106691847044613, 0.20852752588689327, 0.08441602952530487, -0.1226237750191602, 0.07866266116578763, 0.05293336356238973, 0.1522958379824676, 0.07986367905302154, 0.07705119564047744, 0.23550768523146548, 0.15337157538761534, 0.04276566611332518, 0.05083227644584352, -0.1591466755020402, -0.013240160423541262, -0.30325028763543216, -0.1411104114177907, -0.12150153618215793, 0.1204921074309236, -0.10523306357415182, -0.12715901398407897, 0.3324531566081268, 0.12123336914566256, 0.19055167798313402, 0.0016022212683193145, 0.2978327154572452, 0.13668158460603727, 0.026779199219233687, 0.12429514798305688, 0.29272081392306476, 0.17374298306512495, 0.1574910952619487, -0.22289983410568487, -0.020264068633438118, -0.002052825959699769] |
708.3048 | Identifying Small Mean Reverting Portfolios | Given multivariate time series, we study the problem of forming portfolios
with maximum mean reversion while constraining the number of assets in these
portfolios. We show that it can be formulated as a sparse canonical correlation
analysis and study various algorithms to solve the corresponding sparse
generalized eigenvalue problems. After discussing penalized parameter
estimation procedures, we study the sparsity versus predictability tradeoff and
the impact of predictability in various markets.
| cs.CE | given multivariate time series we study the problem of forming portfolios with maximum mean reversion while constraining the number of assets in these portfolios we show that it can be formulated as a sparse canonical correlation analysis and study various algorithms to solve the corresponding sparse generalized eigenvalue problems after discussing penalized parameter estimation procedures we study the sparsity versus predictability tradeoff and the impact of predictability in various markets | [['given', 'multivariate', 'time', 'series', 'we', 'study', 'the', 'problem', 'of', 'forming', 'portfolios', 'with', 'maximum', 'mean', 'reversion', 'while', 'constraining', 'the', 'number', 'of', 'assets', 'in', 'these', 'portfolios', 'we', 'show', 'that', 'it', 'can', 'be', 'formulated', 'as', 'a', 'sparse', 'canonical', 'correlation', 'analysis', 'and', 'study', 'various', 'algorithms', 'to', 'solve', 'the', 'corresponding', 'sparse', 'generalized', 'eigenvalue', 'problems', 'after', 'discussing', 'penalized', 'parameter', 'estimation', 'procedures', 'we', 'study', 'the', 'sparsity', 'versus', 'predictability', 'tradeoff', 'and', 'the', 'impact', 'of', 'predictability', 'in', 'various', 'markets']] | [-0.08271221513859928, 0.023240327600589288, -0.0845502544327506, 0.15899622060990493, -0.05963689744073365, -0.11440507731666523, 0.049219495350761075, 0.4082014654896089, -0.333358406914132, -0.3153843535908631, 0.17884837515718702, -0.25247398203771027, -0.19671235389209218, 0.15287015342286656, -0.10886816059106162, 0.11802872162578361, 0.0680788416481976, -0.015987295018775122, -0.09401653166527726, -0.30746010186682854, 0.26949041509734734, 0.06639178546112297, 0.28732463621667453, 0.010280150259911481, 0.11710296283209963, 0.04719830462043839, -0.07054253297724894, 0.07647962707893124, -0.15101553474471854, 0.12222023989306763, 0.30453914927784353, 0.18567299457000835, 0.3991939642998789, -0.39601176652525155, -0.17685040977916547, 0.21284323050640525, 0.1014881566150247, 0.021274880875301147, 0.04761827254135694, -0.23544187681483372, 0.035219057186830986, -0.15232191936312509, -0.07083510805719666, -0.10182568591886333, -0.037773411720991135, 0.02514676859053517, -0.3217291629889847, 0.11656492886665676, -0.0014852058408515794, 0.0461304966609792, -0.049547613319009545, -0.1499503668264619, 0.03724098030278193, 0.07731188708650215, 0.15905371114079442, -0.09107376314766173, 0.09988432879992096, -0.12755987175873348, -0.15550281739311425, 0.3374682942139251, -0.03771650306880474, -0.19935574047267438, 0.08591947596786277, -0.14220096178885017, -0.1576868803506451, 0.05183838917208569, 0.2644844280156706, 0.0742206605550434, -0.150980067891734, 0.04741895831955065, -0.05336674791095512, 0.12910553786371434, 0.09684527980695878, 0.02020448665134609, 0.15595398444150174, 0.18953656215619827, 0.11878014322636384, 0.15763857779592008, -0.09003292084006327, -0.1290473623201251, -0.25095911620716965, -0.1235197618204568, -0.18452191653528383, -0.026487983362416603, -0.22458861917880962, -0.17131344290184122, 0.4235864745186908, 0.14892924314231745, 0.17985257650060313, 0.13156047772749194, 0.2506211875804833, 0.16172288710617327, -0.04127332060182068, 0.08922916581920748, 0.16677960804330982, 0.108522043004632, 0.05724408994096198, -0.26424555290224294, 0.12009117039851844, 0.0441963406845129] |
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