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709.2535 | Gravitational energy as dark energy: Concordance of cosmological tests | We provide preliminary quantitative evidence that a new solution to averaging
the observed inhomogeneous structure of matter in the universe [gr-qc/0702082,
arxiv:0709.0732], may lead to an observationally viable cosmology without
exotic dark energy. We find parameters which simultaneously satisfy three
independent tests: the match to the angular scale of the sound horizon detected
in the cosmic microwave background anisotropy spectrum; the effective comoving
baryon acoustic oscillation scale detected in galaxy clustering statistics; and
type Ia supernova luminosity distances. Independently of the supernova data,
concordance is obtained for a value of the Hubble constant which agrees with
the measurement of the Hubble Key team of Sandage et al [astro-ph/0603647].
Best-fit parameters include a global average Hubble constant H_0 = 61.7
(+1.2/-1.1) km/s/Mpc, a present epoch void volume fraction of f_{v0} = 0.76
(+0.12/-0.09), and an age of the universe of 14.7 (+0.7/-0.5) billion years as
measured by observers in galaxies. The mass ratio of non-baryonic dark matter
to baryonic matter is 3.1 (+2.5/-2.4), computed with a baryon-to-photon ratio
that concords with primordial lithium abundances.
| astro-ph gr-qc hep-ph hep-th | we provide preliminary quantitative evidence that a new solution to averaging the observed inhomogeneous structure of matter in the universe grqc0702082 arxiv07090732 may lead to an observationally viable cosmology without exotic dark energy we find parameters which simultaneously satisfy three independent tests the match to the angular scale of the sound horizon detected in the cosmic microwave background anisotropy spectrum the effective comoving baryon acoustic oscillation scale detected in galaxy clustering statistics and type ia supernova luminosity distances independently of the supernova data concordance is obtained for a value of the hubble constant which agrees with the measurement of the hubble key team of sandage et al astroph0603647 bestfit parameters include a global average hubble constant h_0 617 1211 kmsmpc a present epoch void volume fraction of f_v0 076 012009 and an age of the universe of 147 0705 billion years as measured by observers in galaxies the mass ratio of nonbaryonic dark matter to baryonic matter is 31 2524 computed with a baryontophoton ratio that concords with primordial lithium abundances | [['we', 'provide', 'preliminary', 'quantitative', 'evidence', 'that', 'a', 'new', 'solution', 'to', 'averaging', 'the', 'observed', 'inhomogeneous', 'structure', 'of', 'matter', 'in', 'the', 'universe', 'grqc0702082', 'arxiv07090732', 'may', 'lead', 'to', 'an', 'observationally', 'viable', 'cosmology', 'without', 'exotic', 'dark', 'energy', 'we', 'find', 'parameters', 'which', 'simultaneously', 'satisfy', 'three', 'independent', 'tests', 'the', 'match', 'to', 'the', 'angular', 'scale', 'of', 'the', 'sound', 'horizon', 'detected', 'in', 'the', 'cosmic', 'microwave', 'background', 'anisotropy', 'spectrum', 'the', 'effective', 'comoving', 'baryon', 'acoustic', 'oscillation', 'scale', 'detected', 'in', 'galaxy', 'clustering', 'statistics', 'and', 'type', 'ia', 'supernova', 'luminosity', 'distances', 'independently', 'of', 'the', 'supernova', 'data', 'concordance', 'is', 'obtained', 'for', 'a', 'value', 'of', 'the', 'hubble', 'constant', 'which', 'agrees', 'with', 'the', 'measurement', 'of', 'the', 'hubble', 'key', 'team', 'of', 'sandage', 'et', 'al', 'astroph0603647', 'bestfit', 'parameters', 'include', 'a', 'global', 'average', 'hubble', 'constant', 'h_0', '617', '1211', 'kmsmpc', 'a', 'present', 'epoch', 'void', 'volume', 'fraction', 'of', 'f_v0', '076', '012009', 'and', 'an', 'age', 'of', 'the', 'universe', 'of', '147', '0705', 'billion', 'years', 'as', 'measured', 'by', 'observers', 'in', 'galaxies', 'the', 'mass', 'ratio', 'of', 'nonbaryonic', 'dark', 'matter', 'to', 'baryonic', 'matter', 'is', '31', '2524', 'computed', 'with', 'a', 'baryontophoton', 'ratio', 'that', 'concords', 'with', 'primordial', 'lithium', 'abundances']] | [-0.10516338109975704, 0.14061992103952764, -0.08712294591444893, 0.0942994856709721, -0.1254383413996323, -0.07185538023351187, 0.017250661324451577, 0.3143236824109342, -0.16202826781692095, -0.40564012112297926, 0.017380943399831563, -0.26539017394162623, 0.048386041821171365, 0.18443490339285998, 0.007507422714527831, 0.0008756376393363777, 0.03555116663597165, -0.0190065250221285, -0.03453213692620307, -0.29518193376099083, 0.2848616933901738, 0.15015238748739912, 0.22419433600089725, -0.05267415362612221, 0.1094411938017829, -0.12128948453387403, -0.11563950510560927, 0.016267084978038377, -0.2473182423375666, 0.020609004288373225, 0.19464323530201547, 0.1731342684960323, 0.180788139741116, -0.3305021774652134, -0.22724801960053392, 0.17296846329335527, 0.18077033495141967, 0.1032774094813917, -0.07364576474583921, -0.3021823479036565, 0.010943040253134468, -0.16947044527118868, -0.15471249263374562, 0.03960127492943016, 0.0367155311017645, -0.031112869741417557, -0.24380556242266974, 0.2477233972172856, -0.08211521666597979, 0.008256193357014871, -0.12580797061077262, -0.11769921366417786, -0.0119181597908308, 0.017063519928649247, 0.048545412295666265, 0.06618186886736517, 0.16708348555692348, -0.12613710902171232, -0.03537681269745556, 0.40745152434311716, -0.1602538434374118, -0.012022879774154848, 0.0945314996621953, -0.1666763805397169, -0.15300532706160413, 0.10301579981874001, 0.1272967773102538, 0.019222196466457772, -0.16679455025762555, 0.07581942983698212, -0.004911416827375631, 0.24479209733930563, 0.08092415845302124, 0.02846282111541845, 0.3134710955186691, 0.12619968227122025, 0.03769857236057946, -0.016024240891867127, -0.15571584898862056, 0.0007804046193536101, -0.3191213267799242, -0.11376881814023188, -0.17396513230717145, 0.08443851241314537, -0.21864341394060588, -0.15005446789247623, 0.3353984657372068, 0.09776076358947791, 0.24171173260463066, 0.051978528491187705, 0.28453197500791894, 0.015307304187094322, 0.05234779824828168, 0.08268167394078729, 0.3782468720013837, 0.1575349936856473, 0.12236853879918512, -0.2509943430356861, 0.02817403699596783, 0.0029233596203512096] |
709.2536 | Spectral Functions and Nuclear Response | I discuss the relation between the nuclear response and the Green function
describing the propagation of a nucleon in the nuclear medium. Within this
formalism, the widely used expressions in terms of spectral functions can be
derived in a consistent and rigorous fashion. The results of recent
applications to the study of the inclusive electron-nucleus cross section in
the impulse approximation regime are brielfy analyzed.
| nucl-th | i discuss the relation between the nuclear response and the green function describing the propagation of a nucleon in the nuclear medium within this formalism the widely used expressions in terms of spectral functions can be derived in a consistent and rigorous fashion the results of recent applications to the study of the inclusive electronnucleus cross section in the impulse approximation regime are brielfy analyzed | [['i', 'discuss', 'the', 'relation', 'between', 'the', 'nuclear', 'response', 'and', 'the', 'green', 'function', 'describing', 'the', 'propagation', 'of', 'a', 'nucleon', 'in', 'the', 'nuclear', 'medium', 'within', 'this', 'formalism', 'the', 'widely', 'used', 'expressions', 'in', 'terms', 'of', 'spectral', 'functions', 'can', 'be', 'derived', 'in', 'a', 'consistent', 'and', 'rigorous', 'fashion', 'the', 'results', 'of', 'recent', 'applications', 'to', 'the', 'study', 'of', 'the', 'inclusive', 'electronnucleus', 'cross', 'section', 'in', 'the', 'impulse', 'approximation', 'regime', 'are', 'brielfy', 'analyzed']] | [-0.058634145389078185, 0.06574133627145784, -0.10762806225102395, 0.12376413837591826, 0.02523441712037311, -0.0031339840352302417, 0.010160084231756628, 0.36160323876538314, -0.22091119462857023, -0.2408443092717789, 0.02241199911077274, -0.26684175203263294, -0.1511967857950367, 0.17703500733477995, 0.03612578169486369, 0.06346131725877058, 0.0014215344308468048, 0.01882992355240276, -0.09904045242001303, -0.15194084741233382, 0.3069635177816963, 0.057545851421309635, 0.2721550548740197, 0.13681221625301987, 0.06428577510814648, 0.10042725026141852, -0.0811082734799129, 0.02151242231775541, -0.14242085556907114, 0.14121839267318137, 0.2814014130126452, 0.08200576395029202, 0.2044453183771111, -0.45344749582000077, -0.1817868859070586, 0.061299085842620116, 0.13800626206648303, 0.11879989469889551, -0.02413879256346263, -0.2607348192977952, 0.03683385124168126, -0.23527620336972177, -0.14314297537202947, -0.04646052278985735, 0.028740499408741016, 0.09305865512942546, -0.2571178656362463, 0.09150760438569705, -0.016159656093805097, -0.002596480570446147, -0.09249553566405666, -0.14034335047472268, 0.05150217070331564, 0.11038022980210371, 0.044307655398370116, 0.04445629978363286, 0.14438232689280994, -0.17686773616514984, -0.08548476386931725, 0.3943371940840734, -0.07991922053679446, -0.18994677606679033, 0.1229049758221663, -0.1971294489499087, -0.07981733145788894, 0.09344835812225938, 0.2182363594911294, 0.11516701716391253, -0.24245186684129294, 0.10511211868833925, -0.034411490414640866, 0.1286097836564295, 0.048993999804224586, 0.06801349843590287, 0.13161534238315653, 0.15474360482767224, -0.047387597973283846, 0.10623519635737466, -0.07014565262943506, -0.10854928502521943, -0.37188039952889085, -0.104069995613429, -0.13236053027503658, 0.005838062090333551, -0.06874109703448994, -0.11774893966503441, 0.4267967323830817, 0.09989949844020884, 0.22710613044910133, 0.012791849716450088, 0.3207290194113739, 0.20766766195447417, 0.03996918179473141, 0.06118092279211851, 0.30930260218156036, 0.23428323628104408, 0.11204373063810635, -0.2330573558792821, 0.07675411761920259, 0.05845295882318169] |
709.2537 | Cosmological Acceleration from Virtual Gravitons | Intrinsic properties of the space itself and quantum fluctuations of its
geometry are sufficient to provide a mechanism for the acceleration of
cosmological expansion (dark energy effect). Applying
Bogoliubov-Born-Green-Kirkwood-Yvon hierarchy approach to self-consistent
equations of one-loop quantum gravity, we found exact solutions that yield
acceleration. The permanent creation and annihilation of virtual gravitons is
not in exact balance because of the expansion of the Universe. The excess
energy comes from the spontaneous process of graviton creation and is trapped
by the background. It provides the macroscopic quantum effect of cosmic
acceleration.
| gr-qc astro-ph hep-ph hep-th | intrinsic properties of the space itself and quantum fluctuations of its geometry are sufficient to provide a mechanism for the acceleration of cosmological expansion dark energy effect applying bogoliubovborngreenkirkwoodyvon hierarchy approach to selfconsistent equations of oneloop quantum gravity we found exact solutions that yield acceleration the permanent creation and annihilation of virtual gravitons is not in exact balance because of the expansion of the universe the excess energy comes from the spontaneous process of graviton creation and is trapped by the background it provides the macroscopic quantum effect of cosmic acceleration | [['intrinsic', 'properties', 'of', 'the', 'space', 'itself', 'and', 'quantum', 'fluctuations', 'of', 'its', 'geometry', 'are', 'sufficient', 'to', 'provide', 'a', 'mechanism', 'for', 'the', 'acceleration', 'of', 'cosmological', 'expansion', 'dark', 'energy', 'effect', 'applying', 'bogoliubovborngreenkirkwoodyvon', 'hierarchy', 'approach', 'to', 'selfconsistent', 'equations', 'of', 'oneloop', 'quantum', 'gravity', 'we', 'found', 'exact', 'solutions', 'that', 'yield', 'acceleration', 'the', 'permanent', 'creation', 'and', 'annihilation', 'of', 'virtual', 'gravitons', 'is', 'not', 'in', 'exact', 'balance', 'because', 'of', 'the', 'expansion', 'of', 'the', 'universe', 'the', 'excess', 'energy', 'comes', 'from', 'the', 'spontaneous', 'process', 'of', 'graviton', 'creation', 'and', 'is', 'trapped', 'by', 'the', 'background', 'it', 'provides', 'the', 'macroscopic', 'quantum', 'effect', 'of', 'cosmic', 'acceleration']] | [-0.1550473142440871, 0.1776384952283659, -0.133653717330442, 0.13859952853268265, -0.09996511338913179, -0.05930325023031661, -0.00010702148294792726, 0.2748189979529643, -0.2496168185434826, -0.3137848191577327, 0.01457185489458165, -0.25186046356192004, -0.0695090947549913, 0.1697470819843667, 0.05090802510724413, 0.007778415797344808, 0.023226111973789366, 0.02208551589257575, -0.013860445845728884, -0.23678764719823067, 0.32596409419080713, 0.14918181432313848, 0.2979712811027459, 0.0772156174765429, 0.15535674416101897, -0.05206270810666975, -0.01758058545829544, -0.016621661817995258, -0.11769425414368616, 0.11360089828587741, 0.143446562182322, 0.13061411531416925, 0.1916407520939074, -0.4459093127829524, -0.2132388962135947, 0.10395083366637374, 0.16471160326541945, 0.17671183479315306, -0.08784833045901505, -0.27265294225743186, 0.028230066498188853, -0.18136305969904412, -0.14667487563565373, -0.06986945476331799, 0.004622067611377973, -0.033964049695366684, -0.23123473576321216, 0.1587699925997755, 0.048633825699133534, -0.040919462290520854, -0.08706370325231987, -0.012261382452529538, -0.010108643671968481, 0.0761180778934651, 0.07424919650305298, -0.012627593530751356, 0.1784628872493548, -0.1828575225669768, -0.1252991083886597, 0.4208838379849772, -0.08942743087862874, -0.17098080043445577, 0.1424691178170698, -0.15430390357377602, -0.06882214969904213, 0.1760204189052744, 0.1036197149871521, 0.07419276337272354, -0.16398992396604556, 0.1859428490503118, 0.07364832761871455, 0.10893637138408618, 0.07312924302807385, 0.0762278782152622, 0.2820065646422106, 0.12264713041156858, 0.033515014890376685, 0.12603847895669598, -0.057791673189418004, -0.14297878981700965, -0.3838440632590881, -0.17532348487229382, -0.1693042779474386, 0.10962470617816288, -0.11602729243487964, -0.2171061628339505, 0.34539323339525324, 0.1497230604802678, 0.13227645533190077, 0.004204704421111843, 0.3042106520752985, 0.14805629766216133, 0.03400318177703481, 0.04785876050284439, 0.3050179368314835, 0.15010526282252273, 0.11046636937976723, -0.31025032847249817, 0.02927669344961152, 0.09864635961539633] |
709.2538 | Few layer graphene on SiC, pyrolitic graphite and graphene: a Raman
scattering study | The results of micro-Raman scattering measurements performed on three
different ``graphitic'' materials: micro-structured disks of highly oriented
pyrolytic graphite, graphene multi-layers thermally decomposed from carbon
terminated surface of 4H-SiC and an exfoliated graphene monolayer are
presented. Despite its multi-layer character, most parts of the surface of the
graphitized SiC substrates shows a single-component, Lorentzian shape, double
resonance Raman feature in striking similarity to the case of a single graphene
monolayer. Our observation suggests a very weak electronic coupling between
graphitic layers on the SiC surface, which therefore can be considered to be
graphene multi-layers with a simple (Dirac-like) band structure.
| cond-mat.mes-hall cond-mat.mtrl-sci | the results of microraman scattering measurements performed on three different graphitic materials microstructured disks of highly oriented pyrolytic graphite graphene multilayers thermally decomposed from carbon terminated surface of 4hsic and an exfoliated graphene monolayer are presented despite its multilayer character most parts of the surface of the graphitized sic substrates shows a singlecomponent lorentzian shape double resonance raman feature in striking similarity to the case of a single graphene monolayer our observation suggests a very weak electronic coupling between graphitic layers on the sic surface which therefore can be considered to be graphene multilayers with a simple diraclike band structure | [['the', 'results', 'of', 'microraman', 'scattering', 'measurements', 'performed', 'on', 'three', 'different', 'graphitic', 'materials', 'microstructured', 'disks', 'of', 'highly', 'oriented', 'pyrolytic', 'graphite', 'graphene', 'multilayers', 'thermally', 'decomposed', 'from', 'carbon', 'terminated', 'surface', 'of', '4hsic', 'and', 'an', 'exfoliated', 'graphene', 'monolayer', 'are', 'presented', 'despite', 'its', 'multilayer', 'character', 'most', 'parts', 'of', 'the', 'surface', 'of', 'the', 'graphitized', 'sic', 'substrates', 'shows', 'a', 'singlecomponent', 'lorentzian', 'shape', 'double', 'resonance', 'raman', 'feature', 'in', 'striking', 'similarity', 'to', 'the', 'case', 'of', 'a', 'single', 'graphene', 'monolayer', 'our', 'observation', 'suggests', 'a', 'very', 'weak', 'electronic', 'coupling', 'between', 'graphitic', 'layers', 'on', 'the', 'sic', 'surface', 'which', 'therefore', 'can', 'be', 'considered', 'to', 'be', 'graphene', 'multilayers', 'with', 'a', 'simple', 'diraclike', 'band', 'structure']] | [-0.1505536778701935, 0.11383904943606467, -0.06949413969414309, -0.08680018450599164, -0.015048341825604439, -0.19362313895951958, 0.05524134933948517, 0.5083877858892083, -0.26714181529474446, -0.24878001445904374, -0.05688386808265932, -0.3234309953916818, -0.1973747275583446, 0.20981464787386359, 0.0392267997097224, 0.03009273015020881, 0.06614238559268415, -0.18300486729945986, -0.06885558099485933, -0.22219494431046768, 0.2640478877874557, 0.03283898538444191, 0.36534077984513713, 0.10747967713046819, -0.013436870849691331, -0.01539175380486995, 0.12246075087226928, 0.010900234906002879, -0.11818303061183542, 0.12123696099501104, 0.26934808972291646, -0.22204376699985004, 0.1245875923638232, -0.5547419916838408, -0.2269357466418296, -0.08846292209811508, 0.10670055469963699, 0.126396841033129, -0.09289531921269373, -0.2774742280622013, 0.07412480929633602, -0.0564868009602651, -0.0510698795132339, -0.017601207871921362, -0.05445844553411007, -0.08113039901480079, -0.16702763962384778, 0.03832606399664655, 0.052237744545564055, 0.07153607743559405, -0.12252650853362866, -0.17049048474589654, -0.19522882010554896, 0.014028256684541702, 0.013069818918593228, -0.013544094455428422, 0.287203074269928, -0.08510382986161857, -0.07575556131079793, 0.4170292671956122, -0.08438467754051089, -0.10627466674894094, 0.22135962879285218, -0.16679154392331838, -0.056266994262114164, 0.19397787837311625, 0.1068131302378606, 0.1753982759360224, -0.1771848396124551, 0.02869983595737722, -0.056421973090618846, 0.20221460729837418, 0.1413415918406099, 0.07582807581406087, 0.29476846762001513, 0.24731161627918483, -0.008128142658388243, 0.1579582963231951, -0.14794407767243684, 0.08373592054937035, -0.13787636659108102, -0.22930977638345212, -0.24737430898705498, 0.11243104200228117, -0.11448624252327136, -0.29618267046287655, 0.41628508135676384, 0.006397054516710341, 0.18792967546731235, -0.08316877399687655, 0.2235605270974338, 0.04417689769063145, 0.10632719178451225, -0.04549652319867164, 0.2851970900082961, 0.20728219771757722, 0.06594852230511605, -0.18989504034165294, 0.08130106830038131, -0.04761097317561507] |
709.2539 | Multi-dimensional Virasoro algebra and quantum gravity | I review the multi-dimensional generalizations of the Virasoro algebra, i.e.
the non-central Lie algebra extensions of the algebra vect(N) of general vector
fields in N dimensions, and its Fock representations. Being the Noether
symmetry of background independent theories such as N-dimensional general
relativity, this algebra is expected to be relevant to the quantization of
gravity. To this end, more complicated modules which depend on dynamics in the
form of Euler-Lagrange equations are described. These modules can apparently
only be interpreted as quantum fields if spacetime has four dimensions and both
bosons and fermions are present.
| hep-th gr-qc | i review the multidimensional generalizations of the virasoro algebra ie the noncentral lie algebra extensions of the algebra vectn of general vector fields in n dimensions and its fock representations being the noether symmetry of background independent theories such as ndimensional general relativity this algebra is expected to be relevant to the quantization of gravity to this end more complicated modules which depend on dynamics in the form of eulerlagrange equations are described these modules can apparently only be interpreted as quantum fields if spacetime has four dimensions and both bosons and fermions are present | [['i', 'review', 'the', 'multidimensional', 'generalizations', 'of', 'the', 'virasoro', 'algebra', 'ie', 'the', 'noncentral', 'lie', 'algebra', 'extensions', 'of', 'the', 'algebra', 'vectn', 'of', 'general', 'vector', 'fields', 'in', 'n', 'dimensions', 'and', 'its', 'fock', 'representations', 'being', 'the', 'noether', 'symmetry', 'of', 'background', 'independent', 'theories', 'such', 'as', 'ndimensional', 'general', 'relativity', 'this', 'algebra', 'is', 'expected', 'to', 'be', 'relevant', 'to', 'the', 'quantization', 'of', 'gravity', 'to', 'this', 'end', 'more', 'complicated', 'modules', 'which', 'depend', 'on', 'dynamics', 'in', 'the', 'form', 'of', 'eulerlagrange', 'equations', 'are', 'described', 'these', 'modules', 'can', 'apparently', 'only', 'be', 'interpreted', 'as', 'quantum', 'fields', 'if', 'spacetime', 'has', 'four', 'dimensions', 'and', 'both', 'bosons', 'and', 'fermions', 'are', 'present']] | [-0.1563357876984036, 0.16391667833631027, -0.06119258351069182, 0.0800879298488887, -0.12799221366406122, -0.16424603733987092, -0.10991377506821239, 0.29815776469285027, -0.2807780234737599, -0.24037543067986028, 0.12984883816209325, -0.23757921276178132, -0.13876154590546688, 0.13419896097447565, -0.08081221194477117, -0.027744578951201897, 0.019503789569964593, 0.10370468827796743, -0.10549287322631225, -0.29186767093995786, 0.37511933095099287, 0.022115806527584395, 0.2300861366811466, -0.03753069915035938, 0.11559147751850492, 0.01079062097507747, -0.0078721676681914, 0.018696528220390703, -0.07008077205218216, 0.09829777844765401, 0.2892045326669641, 0.08425773252004527, 0.15816844134601427, -0.42544426037830874, -0.17527060337523195, 0.11488347926097824, 0.19153084501901524, 0.10951425493546227, -0.012783469839864956, -0.3094783425727423, 0.03477914013127063, -0.20183357517135905, -0.1345352018252015, -0.10740947377858089, 0.04526335125952523, -0.030038973455257873, -0.21687162376722283, 0.08530112264053698, 0.061283929137255444, 0.0668941823210805, -0.09165228196999375, -0.11227636636319036, -0.0685537968034004, 0.058713136141763086, 0.034953973231282326, 0.021680492605578076, 0.13906675998859622, -0.14900388801965783, -0.16992606300900273, 0.41132805726312577, -0.004840241155606952, -0.3065276340819261, 0.16993030087844013, -0.1827686478512639, -0.17256043751307942, 0.0385086606851125, 0.13348709668548026, 0.13509174602779936, -0.1266436667894905, 0.2013608441878379, -0.057982862396958344, 0.04495066574754867, 0.08006643752587285, 0.0786445768750669, 0.22641964660997085, 0.07566629774234396, 0.010361252561895216, 0.09721105499936149, 0.04246915130073482, -0.11510668475022341, -0.4171916616169062, -0.19292926181979636, -0.12719131639336256, 0.11165490808173459, -0.12055899885912212, -0.1501202269189773, 0.4080744194476172, 0.15070757282243924, 0.13981178340482267, 0.04400812432373022, 0.20378121357173362, 0.1701086018497045, 0.1333904782795605, 0.0639013135458957, 0.20696201921004723, 0.2353941262402433, 0.045268662266453055, -0.13407845536068558, -0.08445339220417465, 0.13612632207978675] |
709.254 | Manifestly covariant canonical quantization of gravity and
diffeomorphism anomalies in four dimensions | Canonical quantization of gravity requires knowledge about the representation
theory of its constraint algebra, which is physically equivalent to the algebra
of arbitrary 4-diffeomorphisms. All interesting lowest-energy representations
are projective, making the relevant algebra into a four-dimensional
generalization of the Virasoro algebra. Such diffeomorphism anomalies are
invisible in field theory, because the relevant cocycles are functionals of the
observer's trajectory in spacetime. The multi-dimensional Virasoro algebra acts
naturally in the phase space of arbitrary histories, with dynamics playing the
role of first-class constraints. General relativity is regularized by expanding
all fields in Taylor series around the observer's trajectory, and truncating at
some fixed order. This regularized but manifestly general-covariant theory is
quantized in the history phase space, and dynamics is imposed afterwards, in
analogy with BRST quantization. Infinities arise when the regularization is
removed; it is presently unclear how these should be dealt with.
| hep-th gr-qc | canonical quantization of gravity requires knowledge about the representation theory of its constraint algebra which is physically equivalent to the algebra of arbitrary 4diffeomorphisms all interesting lowestenergy representations are projective making the relevant algebra into a fourdimensional generalization of the virasoro algebra such diffeomorphism anomalies are invisible in field theory because the relevant cocycles are functionals of the observers trajectory in spacetime the multidimensional virasoro algebra acts naturally in the phase space of arbitrary histories with dynamics playing the role of firstclass constraints general relativity is regularized by expanding all fields in taylor series around the observers trajectory and truncating at some fixed order this regularized but manifestly generalcovariant theory is quantized in the history phase space and dynamics is imposed afterwards in analogy with brst quantization infinities arise when the regularization is removed it is presently unclear how these should be dealt with | [['canonical', 'quantization', 'of', 'gravity', 'requires', 'knowledge', 'about', 'the', 'representation', 'theory', 'of', 'its', 'constraint', 'algebra', 'which', 'is', 'physically', 'equivalent', 'to', 'the', 'algebra', 'of', 'arbitrary', '4diffeomorphisms', 'all', 'interesting', 'lowestenergy', 'representations', 'are', 'projective', 'making', 'the', 'relevant', 'algebra', 'into', 'a', 'fourdimensional', 'generalization', 'of', 'the', 'virasoro', 'algebra', 'such', 'diffeomorphism', 'anomalies', 'are', 'invisible', 'in', 'field', 'theory', 'because', 'the', 'relevant', 'cocycles', 'are', 'functionals', 'of', 'the', 'observers', 'trajectory', 'in', 'spacetime', 'the', 'multidimensional', 'virasoro', 'algebra', 'acts', 'naturally', 'in', 'the', 'phase', 'space', 'of', 'arbitrary', 'histories', 'with', 'dynamics', 'playing', 'the', 'role', 'of', 'firstclass', 'constraints', 'general', 'relativity', 'is', 'regularized', 'by', 'expanding', 'all', 'fields', 'in', 'taylor', 'series', 'around', 'the', 'observers', 'trajectory', 'and', 'truncating', 'at', 'some', 'fixed', 'order', 'this', 'regularized', 'but', 'manifestly', 'generalcovariant', 'theory', 'is', 'quantized', 'in', 'the', 'history', 'phase', 'space', 'and', 'dynamics', 'is', 'imposed', 'afterwards', 'in', 'analogy', 'with', 'brst', 'quantization', 'infinities', 'arise', 'when', 'the', 'regularization', 'is', 'removed', 'it', 'is', 'presently', 'unclear', 'how', 'these', 'should', 'be', 'dealt', 'with']] | [-0.17440885125164438, 0.1548311777471506, -0.11603576143864881, 0.08366579677375567, -0.1471133731400034, -0.13513227382844145, -0.061139636300992665, 0.32205851574532585, -0.3095812409484459, -0.25931514147831897, 0.12502719660719427, -0.2472258822836138, -0.16474792634143487, 0.1131892138701323, -0.12301518706852323, 0.020688992201666496, 0.0368307355735972, 0.10671248964288017, -0.11260373258907869, -0.24865373493647658, 0.36961071476197016, 0.07773746441320314, 0.2275583941987683, -0.04009039792675082, 0.13276988662082467, 0.02725761303827948, -0.036660833938789744, 0.01156420784903091, -0.06769838157741652, 0.0771227717852233, 0.28863255954119604, 0.11016189012354097, 0.22911159380768928, -0.4364633113666848, -0.19985489718212218, 0.08723150455503614, 0.16059869942027372, 0.11206691928740699, -0.001084282519056163, -0.28238537765622557, 0.02026752797857015, -0.15826608744690884, -0.12451004359701817, -0.10842283616995217, 0.011673523237687777, -0.09363012835122905, -0.22010231537783478, 0.08504109283896176, 0.0284888312697632, 0.05660809154862007, -0.11149004091577071, -0.05502134898084809, -0.07254695414583413, 0.09679518725948531, 0.06336049702005474, 0.07690118112067294, 0.15426406086181532, -0.12232509038372004, -0.09723547035242086, 0.4080494678468554, 0.0068483728959413985, -0.2792868578409242, 0.10880897376503977, -0.19213285918145642, -0.1879431426857266, 0.10549942084846178, 0.05932116055603862, 0.1355905429528492, -0.11829132032371045, 0.20797210455614865, -0.029352192265483048, 0.06100309808035153, 0.08619443061468485, 0.06822676875122165, 0.26530884520209336, 0.07865349332870382, 0.031135765741208007, 0.09287721977546368, 0.05232166349106319, -0.18054380649831014, -0.399224644201202, -0.12932487204670906, -0.12369961186370754, 0.07908220870837153, -0.13081856149837368, -0.14731041485951704, 0.3527554811102214, 0.15337464682288937, 0.15867174723530775, 0.033124076157736666, 0.25812422488067116, 0.1555939617443022, 0.10995497434706121, 0.04833821833159749, 0.20759438256789292, 0.19439183992424888, 0.042462255765026165, -0.1843044095855024, -0.0301333635416976, 0.1499942144626504] |
709.2541 | Non-minimally coupled multi-scalar black holes | We study the static, spherically symmetric black hole solutions for a
non-minimally coupled multi-scalar theory. We find numerical solutions for
values of the scalar fields when a certain constraint on the maximal charge is
satisfied. Beyond this constraint no black hole solutions exist. This
constraint therefore corresponds to extremal solutions, however, this does not
match the \kappa = 0 constraint which typically indicates extremal solutions in
other models. This implies that the set of extremal solutions have non-zero,
finite and varying surface gravity. These solutions also violate the no-hair
theorems for N>1 scalar fields and have previously been proven to be linearly
stable.
| gr-qc | we study the static spherically symmetric black hole solutions for a nonminimally coupled multiscalar theory we find numerical solutions for values of the scalar fields when a certain constraint on the maximal charge is satisfied beyond this constraint no black hole solutions exist this constraint therefore corresponds to extremal solutions however this does not match the kappa 0 constraint which typically indicates extremal solutions in other models this implies that the set of extremal solutions have nonzero finite and varying surface gravity these solutions also violate the nohair theorems for n1 scalar fields and have previously been proven to be linearly stable | [['we', 'study', 'the', 'static', 'spherically', 'symmetric', 'black', 'hole', 'solutions', 'for', 'a', 'nonminimally', 'coupled', 'multiscalar', 'theory', 'we', 'find', 'numerical', 'solutions', 'for', 'values', 'of', 'the', 'scalar', 'fields', 'when', 'a', 'certain', 'constraint', 'on', 'the', 'maximal', 'charge', 'is', 'satisfied', 'beyond', 'this', 'constraint', 'no', 'black', 'hole', 'solutions', 'exist', 'this', 'constraint', 'therefore', 'corresponds', 'to', 'extremal', 'solutions', 'however', 'this', 'does', 'not', 'match', 'the', 'kappa', '0', 'constraint', 'which', 'typically', 'indicates', 'extremal', 'solutions', 'in', 'other', 'models', 'this', 'implies', 'that', 'the', 'set', 'of', 'extremal', 'solutions', 'have', 'nonzero', 'finite', 'and', 'varying', 'surface', 'gravity', 'these', 'solutions', 'also', 'violate', 'the', 'nohair', 'theorems', 'for', 'n1', 'scalar', 'fields', 'and', 'have', 'previously', 'been', 'proven', 'to', 'be', 'linearly', 'stable']] | [-0.17636818951452335, 0.09803141877237781, -0.06642122601852844, 0.13226819972567005, -0.10865055306303296, -0.23040738515099327, -0.01119169054721829, 0.26447051072347105, -0.17535097738180092, -0.2771282836511804, 0.14194416848134578, -0.30877191836343093, -0.09565437641268705, 0.15645527859747993, -0.03288204470357182, 0.08370188036924982, 0.0015382243722092872, 0.08046175897413609, -0.10317951281253687, -0.24743866360764585, 0.3690532820810582, -0.017949842060368287, 0.2760885837761795, 0.05026874171716033, 0.08812226210355613, -0.0654339561804983, 0.04024409563463254, 0.09309277140224974, -0.20187962323910266, 0.04043438848035008, 0.23209049241029112, 0.13550037382325777, 0.2164982495819191, -0.41253681029832245, -0.250244202420992, 0.18044349071387128, 0.16060343186151893, 0.16539894664253785, -0.08261534354909707, -0.20522866912149623, 0.1545166939944394, -0.17059838117155082, -0.1814748468288385, -0.07966458282031703, 0.04591102588593083, 0.010748582591950967, -0.2895784798470855, 0.0933536766253882, 0.0850919231923078, -0.04954268706633764, -0.15766837738691739, -0.05392891070697064, -0.03934323719894404, 0.03365906060350301, 0.16919253654857896, 0.02337920180677126, 0.08289105390819411, -0.14012916679676696, -0.09144884357274528, 0.31515884243280573, -0.07483417098410428, -0.2975408932600426, 0.15940435860744295, -0.18545898982990242, -0.17221226877368548, 0.11047213309325789, 0.10625405653434641, 0.2501153600740009, -0.14299595991321315, 0.21983734127385177, -0.06699105311532084, 0.18972566521466327, 0.154705765985829, 0.052008235926383775, 0.3187925882418366, 0.022367162947250784, 0.11273575205739368, 0.1197014088627161, 0.04157716159334443, -0.1286075902262739, -0.33437902799935315, -0.10202469704124857, -0.11735948949924432, 0.11154021313382591, -0.16105750535914956, -0.21834464781168922, 0.3315064321710345, 0.12183709795057189, 0.10779041878185143, 0.0653457306428155, 0.17852261995750607, 0.14697501338649124, 0.045078761293552816, 0.11660785688025713, 0.3475796849142723, 0.1531634276878892, 0.09220815342440106, -0.20343563922934288, -0.03951532051295919, 0.06621996678558051] |
709.2542 | Dissipative Hyperbolic Geometric Flow | In this paper we introduce and study a new kind of hyperbolic geometric flows
--dissipative hyperbolic geometric flow. This kind of flow is defined by a
system of quasilinear wave equations with dissipative terms. Some interesting
exact solutions are given, in particular, a new concept-- hyperbolic Ricci
soliton is introduced and some of its geometric properties are described. We
also establish the short-time existence and uniqueness theorem for the
dissipative hyperbolic geometric flow, and prove the nonlinear stability of the
flow defined on the Euclidean space of dimension larger than 2. Wave character
of the evolving metrics and curvatures is illustrated and the nonlinear wave
equations satisfied by the curvatures are derived.
| math.DG math.AP | in this paper we introduce and study a new kind of hyperbolic geometric flows dissipative hyperbolic geometric flow this kind of flow is defined by a system of quasilinear wave equations with dissipative terms some interesting exact solutions are given in particular a new concept hyperbolic ricci soliton is introduced and some of its geometric properties are described we also establish the shorttime existence and uniqueness theorem for the dissipative hyperbolic geometric flow and prove the nonlinear stability of the flow defined on the euclidean space of dimension larger than 2 wave character of the evolving metrics and curvatures is illustrated and the nonlinear wave equations satisfied by the curvatures are derived | [['in', 'this', 'paper', 'we', 'introduce', 'and', 'study', 'a', 'new', 'kind', 'of', 'hyperbolic', 'geometric', 'flows', 'dissipative', 'hyperbolic', 'geometric', 'flow', 'this', 'kind', 'of', 'flow', 'is', 'defined', 'by', 'a', 'system', 'of', 'quasilinear', 'wave', 'equations', 'with', 'dissipative', 'terms', 'some', 'interesting', 'exact', 'solutions', 'are', 'given', 'in', 'particular', 'a', 'new', 'concept', 'hyperbolic', 'ricci', 'soliton', 'is', 'introduced', 'and', 'some', 'of', 'its', 'geometric', 'properties', 'are', 'described', 'we', 'also', 'establish', 'the', 'shorttime', 'existence', 'and', 'uniqueness', 'theorem', 'for', 'the', 'dissipative', 'hyperbolic', 'geometric', 'flow', 'and', 'prove', 'the', 'nonlinear', 'stability', 'of', 'the', 'flow', 'defined', 'on', 'the', 'euclidean', 'space', 'of', 'dimension', 'larger', 'than', '2', 'wave', 'character', 'of', 'the', 'evolving', 'metrics', 'and', 'curvatures', 'is', 'illustrated', 'and', 'the', 'nonlinear', 'wave', 'equations', 'satisfied', 'by', 'the', 'curvatures', 'are', 'derived']] | [-0.22111676873672487, 0.11897828261550915, -0.08867320923932961, 0.08283500218801366, -0.11402241848658637, -0.10791722271824256, -0.10252417707878132, 0.2739819699865101, -0.28776688722427934, -0.20466810715983488, 0.14558409318020235, -0.25891526877447696, -0.21540919270566, 0.22117590620681377, -0.0769584236051222, 0.10936867291820818, 0.030497623052464666, 0.04123886847394585, -0.09094596747724738, -0.19812466756931307, 0.41997601384563105, -0.06362314073235861, 0.2198547885907049, 0.07053714783147111, 0.16773870266375265, -0.03409129004700974, -0.038518345299442966, 0.0766398844381391, -0.24104673016284192, 0.14699846220069698, 0.1997055851451088, 0.055494158707525845, 0.23419651464376198, -0.3882942058511877, -0.26338689393430414, 0.08133928455312603, 0.1120759688326091, 0.06248661603603978, -0.05396237955989948, -0.3347278471919708, 0.08436566928659366, -0.0944769047117526, -0.22108138291254623, -0.09291952942917955, -0.0014959509883608138, 0.08334547128470149, -0.19221210733355423, 0.1168659368826671, 0.13939526519970968, 0.07115471132731598, -0.09552890239553692, -0.02520828299436419, -0.056171150911333304, 0.0635415491612678, 0.04525898283671787, -0.026949435665820993, 0.05848780904696988, -0.10132922460148361, -0.07550903698263157, 0.4029408962773492, -0.07575239604154506, -0.2895790984454964, 0.15464081309411476, -0.1067961181730165, -0.0835564053039499, 0.11555122513008038, 0.2197322765257143, 0.15420633989353, -0.1333313108126666, 0.09748262145883148, -0.06687253364322844, 0.08147494982196284, 0.11699575905471907, 0.04333903335334201, 0.10927062711977799, 0.14256422123331244, 0.11748569691137943, 0.1744623714683777, 0.013616029728187382, -0.13781376700249634, -0.36464368678363307, -0.19527642634160916, -0.1663809222352159, 0.0983845424334504, -0.13671793013184338, -0.1846592707027282, 0.4266932470615887, 0.05293932081050506, 0.1424550687079318, 0.0925386875003044, 0.24454106917047674, 0.1774145673947974, -0.02411787392754507, 0.11235511522889803, 0.2499018464196914, 0.18321685608160415, 0.11164249682250167, -0.20150962605631711, -0.0038873606536071748, 0.16593948165453704] |
709.2543 | Calculation of Magnetic Field Noise from High-Permeability Magnetic
Shields and Conducting Objects with Simple Geometry | High-permeability magnetic shields generate magnetic field noise that can
limit the sensitivity of modern precision measurements. We show that
calculations based on the fluctuation-dissipation theorem allow quantitative
evaluation of magnetic field noise, either from current or magnetization
fluctuations, inside enclosures made of high-permeability materials. Explicit
analytical formulas for the noise are derived for a few axially symmetric
geometries, which are compared with results of numerical finite element
analysis. Comparison is made between noises caused by current and magnetization
fluctuations inside a high-permeability shield and also between
current-fluctuation-induced noises inside magnetic and non-magnetic conducting
shells. A simple model is suggested to predict power-law decay of noise spectra
beyond quasi-static regime. Our results can be used to assess noise from
existing shields and to guide design of new shields for precision measurements.
| physics.ins-det | highpermeability magnetic shields generate magnetic field noise that can limit the sensitivity of modern precision measurements we show that calculations based on the fluctuationdissipation theorem allow quantitative evaluation of magnetic field noise either from current or magnetization fluctuations inside enclosures made of highpermeability materials explicit analytical formulas for the noise are derived for a few axially symmetric geometries which are compared with results of numerical finite element analysis comparison is made between noises caused by current and magnetization fluctuations inside a highpermeability shield and also between currentfluctuationinduced noises inside magnetic and nonmagnetic conducting shells a simple model is suggested to predict powerlaw decay of noise spectra beyond quasistatic regime our results can be used to assess noise from existing shields and to guide design of new shields for precision measurements | [['highpermeability', 'magnetic', 'shields', 'generate', 'magnetic', 'field', 'noise', 'that', 'can', 'limit', 'the', 'sensitivity', 'of', 'modern', 'precision', 'measurements', 'we', 'show', 'that', 'calculations', 'based', 'on', 'the', 'fluctuationdissipation', 'theorem', 'allow', 'quantitative', 'evaluation', 'of', 'magnetic', 'field', 'noise', 'either', 'from', 'current', 'or', 'magnetization', 'fluctuations', 'inside', 'enclosures', 'made', 'of', 'highpermeability', 'materials', 'explicit', 'analytical', 'formulas', 'for', 'the', 'noise', 'are', 'derived', 'for', 'a', 'few', 'axially', 'symmetric', 'geometries', 'which', 'are', 'compared', 'with', 'results', 'of', 'numerical', 'finite', 'element', 'analysis', 'comparison', 'is', 'made', 'between', 'noises', 'caused', 'by', 'current', 'and', 'magnetization', 'fluctuations', 'inside', 'a', 'highpermeability', 'shield', 'and', 'also', 'between', 'currentfluctuationinduced', 'noises', 'inside', 'magnetic', 'and', 'nonmagnetic', 'conducting', 'shells', 'a', 'simple', 'model', 'is', 'suggested', 'to', 'predict', 'powerlaw', 'decay', 'of', 'noise', 'spectra', 'beyond', 'quasistatic', 'regime', 'our', 'results', 'can', 'be', 'used', 'to', 'assess', 'noise', 'from', 'existing', 'shields', 'and', 'to', 'guide', 'design', 'of', 'new', 'shields', 'for', 'precision', 'measurements']] | [-0.10100777499926414, 0.1320990866100661, -0.0572681957169963, 0.055035795336011654, -0.05742043364150522, -0.1406083559263642, 0.04630659393561903, 0.3787388656894828, -0.2136072182320347, -0.33914972111120706, 0.09402105373027193, -0.2779657135125567, -0.0949762792294022, 0.265717057664626, -0.037373083722466324, 0.03604658329390105, 0.029437007016119683, -0.025243711544114145, -0.06511609405892822, -0.14991488010990758, 0.2528333339565831, 0.061278799577623375, 0.30506188668628303, 0.04378390539249824, 0.04986445918609749, -0.03869023729366604, -0.011436318170077116, 0.08878418668209351, -0.1251806176720817, 0.04102062487021782, 0.2053352392943262, -0.0036041716712909614, 0.18140787782161966, -0.4979944981403591, -0.2153898431710148, 0.05605149939800649, 0.11699687960411444, 0.12928148508775805, -0.08320735463630696, -0.3019160435448379, 0.08177188263444389, -0.1403760629247643, -0.14273335886108438, -0.15255732377341322, -0.031096019412123765, 0.07889468663204245, -0.3500544659995524, 0.07933479268667866, 0.06520885957202824, 0.07364748584871612, -0.08142817884416485, -0.13144606122541305, 0.012794324234777759, 0.11326496836787105, 0.057831607598815, 0.01229436799176326, 0.2246389842606619, -0.11874172838121407, -0.09305956984992868, 0.29125214617901535, -0.09950187233047218, -0.18606770790160396, 0.14698567756365033, -0.16093321903356056, -0.044407396472615095, 0.17066043791498325, 0.1497670621105809, 0.06807680960109298, -0.16082762416394414, 0.038446153772186284, 0.03166309092193842, 0.19667636157850943, 0.06135542205419363, 0.023619577606288036, 0.2354234806875619, 0.1697294963162768, 0.002008783194243677, 0.15294191034333854, -0.13571186812031408, -0.0594926111746666, -0.2916432836259058, -0.11582494041225476, -0.17941005836248167, 0.06749279640864062, -0.0792386275350636, -0.19589446045732659, 0.316332582788643, 0.19717987153910158, 0.11896500953783591, 0.011514625303598857, 0.33984344376092274, 0.07082116121494811, 0.03736709890699433, 0.0627520022581714, 0.275582190696872, 0.2351418372059544, 0.09245344599015838, -0.20205472738575914, 0.048771004315263544, -0.011374480910454841] |
709.2544 | Electroweak Contributions to Squark Pair Production at the LHC | In this paper we compute electroweak contributions to the production of
squark pairs at hadron colliders. These include the exchange of electroweak
gauge bosons in the s-channel as well as electroweak gaugino exchange in the t-
and/or u-channel. In many cases these can interfere with the dominant QCD
contributions. As a result, we find sizable contributions to the production of
two SU(2) doublet squarks. At the LHC, they amount to 10 to 20% for typical
mSUGRA (or CMSSM) scenarios, but in more general scenarios they can vary
between -40 and +55%, depending on size and sign of the SU(2) gaugino mass. The
electroweak contribution to the total squark pair production rate at the LHC is
about 3.5 times smaller.
| hep-ph | in this paper we compute electroweak contributions to the production of squark pairs at hadron colliders these include the exchange of electroweak gauge bosons in the schannel as well as electroweak gaugino exchange in the t andor uchannel in many cases these can interfere with the dominant qcd contributions as a result we find sizable contributions to the production of two su2 doublet squarks at the lhc they amount to 10 to 20 for typical msugra or cmssm scenarios but in more general scenarios they can vary between 40 and 55 depending on size and sign of the su2 gaugino mass the electroweak contribution to the total squark pair production rate at the lhc is about 35 times smaller | [['in', 'this', 'paper', 'we', 'compute', 'electroweak', 'contributions', 'to', 'the', 'production', 'of', 'squark', 'pairs', 'at', 'hadron', 'colliders', 'these', 'include', 'the', 'exchange', 'of', 'electroweak', 'gauge', 'bosons', 'in', 'the', 'schannel', 'as', 'well', 'as', 'electroweak', 'gaugino', 'exchange', 'in', 'the', 't', 'andor', 'uchannel', 'in', 'many', 'cases', 'these', 'can', 'interfere', 'with', 'the', 'dominant', 'qcd', 'contributions', 'as', 'a', 'result', 'we', 'find', 'sizable', 'contributions', 'to', 'the', 'production', 'of', 'two', 'su2', 'doublet', 'squarks', 'at', 'the', 'lhc', 'they', 'amount', 'to', '10', 'to', '20', 'for', 'typical', 'msugra', 'or', 'cmssm', 'scenarios', 'but', 'in', 'more', 'general', 'scenarios', 'they', 'can', 'vary', 'between', '40', 'and', '55', 'depending', 'on', 'size', 'and', 'sign', 'of', 'the', 'su2', 'gaugino', 'mass', 'the', 'electroweak', 'contribution', 'to', 'the', 'total', 'squark', 'pair', 'production', 'rate', 'at', 'the', 'lhc', 'is', 'about', '35', 'times', 'smaller']] | [-0.10026300432133105, 0.3050316135798182, 0.00976312714198432, 0.19400124294104196, -0.06347405303371366, -0.1362592868767131, 0.0444992539099175, 0.33189000735575913, -0.21146007198762118, -0.32845359810573216, 0.012874291261791118, -0.33302176427565705, 0.04095354305087205, 0.11923159377751168, 0.060320883296711855, 0.032576782597588894, 0.03080183008936148, 0.011952121344888034, -0.0595098980448107, -0.3201072880559984, 0.28854422320361334, -0.007918879311500477, 0.14783559161230547, 0.1805602334392797, 0.022231670440871175, -0.0071758048397590635, -0.011302951269904386, -0.14619529954080546, -0.08818304932386685, 0.04867459629357111, 0.2598235342698563, 0.03467759831628504, 0.10254313418359942, -0.33123591151714576, -0.0679318442336135, 0.17885020306380858, 0.169873322309347, 0.1283550097082718, -0.02352685271921282, -0.2611369970861134, 0.12151087404956587, -0.2588388288800581, -0.06466974058685464, -0.028652149784777845, -0.050713117390933656, -0.1525075201790373, -0.3523934076094076, 0.09022446818837598, -0.07822281609488917, 0.01780269351913085, 0.03561080925698791, -0.19666603532279334, -0.13283983373646663, 0.010621745450453473, 0.19470973469966538, 0.03255740353962829, 0.20861273140748257, -0.23121474362995884, -0.17467181545294852, 0.43296275688765745, -0.09760924112521299, -0.1502952402880212, 0.21514024639486515, -0.1779332051891051, -0.17555088442632882, 0.13936351381531847, 0.25033542351061555, 0.07093071752152515, -0.14968795689339398, 0.1421085403001468, 0.028833263444111627, 0.17797382341251716, 0.11077908518872842, 0.09177827521886661, 0.24973757785721487, 0.15628145169858046, 0.04450483537844515, 0.052919287216935715, -0.06111855967119023, -0.12774338877266822, -0.46975344759138193, -0.08393263569842249, -0.03923172387098815, 0.049556618248222065, -0.09260243695095267, -0.07252750182602585, 0.3747462031877592, 0.14346390170193896, 0.293760848505532, 0.02211685902086877, 0.31187377772646163, 0.05991777371930178, 0.13590184993212337, 0.023967385501405147, 0.33525818160993337, 0.09680630326145838, 0.15762035482555253, -0.2148180331510468, -0.013043998574550427, 0.06624278037206215] |
709.2545 | Non-Gaussianity in the modulated reheating scenario | We investigate the non-Gaussianity of primordial curvature perturbation in
the modulated reheating scenario where the primordial perturbation is generated
due to the spacial fluctuation of the inflaton decay rate to radiation. We use
the $\delta N$ formalism to evaluate the trispectrum of curvature perturbation
as well as its bispectrum. We give expressions for three non-linear parameters
$f_{NL}, \tau_{NL}$ and $g_{NL}$ in the modulated reheating scenario. If the
intrinsic non-Gaussianity of scalar field fluctuations and third derivative of
the decay rate with respect to scalar fields are negligibly small, $g_{NL}$ has
at least the same order of magnitude as $f_{NL}$. We also give general
inequality between $f_{NL}$ and $\tau_{NL}$ which is true for other
inflationary scenarios as long as primordial non-Gaussianity comes from
super-horizon evolution.
| astro-ph hep-ph | we investigate the nongaussianity of primordial curvature perturbation in the modulated reheating scenario where the primordial perturbation is generated due to the spacial fluctuation of the inflaton decay rate to radiation we use the delta n formalism to evaluate the trispectrum of curvature perturbation as well as its bispectrum we give expressions for three nonlinear parameters f_nl tau_nl and g_nl in the modulated reheating scenario if the intrinsic nongaussianity of scalar field fluctuations and third derivative of the decay rate with respect to scalar fields are negligibly small g_nl has at least the same order of magnitude as f_nl we also give general inequality between f_nl and tau_nl which is true for other inflationary scenarios as long as primordial nongaussianity comes from superhorizon evolution | [['we', 'investigate', 'the', 'nongaussianity', 'of', 'primordial', 'curvature', 'perturbation', 'in', 'the', 'modulated', 'reheating', 'scenario', 'where', 'the', 'primordial', 'perturbation', 'is', 'generated', 'due', 'to', 'the', 'spacial', 'fluctuation', 'of', 'the', 'inflaton', 'decay', 'rate', 'to', 'radiation', 'we', 'use', 'the', 'delta', 'n', 'formalism', 'to', 'evaluate', 'the', 'trispectrum', 'of', 'curvature', 'perturbation', 'as', 'well', 'as', 'its', 'bispectrum', 'we', 'give', 'expressions', 'for', 'three', 'nonlinear', 'parameters', 'f_nl', 'tau_nl', 'and', 'g_nl', 'in', 'the', 'modulated', 'reheating', 'scenario', 'if', 'the', 'intrinsic', 'nongaussianity', 'of', 'scalar', 'field', 'fluctuations', 'and', 'third', 'derivative', 'of', 'the', 'decay', 'rate', 'with', 'respect', 'to', 'scalar', 'fields', 'are', 'negligibly', 'small', 'g_nl', 'has', 'at', 'least', 'the', 'same', 'order', 'of', 'magnitude', 'as', 'f_nl', 'we', 'also', 'give', 'general', 'inequality', 'between', 'f_nl', 'and', 'tau_nl', 'which', 'is', 'true', 'for', 'other', 'inflationary', 'scenarios', 'as', 'long', 'as', 'primordial', 'nongaussianity', 'comes', 'from', 'superhorizon', 'evolution']] | [-0.1963643630320627, 0.18204758060915815, -0.07086937648390661, 0.18045730270340196, -0.09295894417746534, -0.13789414599793212, -0.09852977988174966, 0.2576413074613459, -0.2472060035027924, -0.30183851837430287, 0.06531270028039392, -0.25968211665449126, -0.12144124170862919, 0.17303003687524207, 0.03109257254419067, 0.015557468293756697, -0.044710384280000244, 0.03055852563721278, -0.00500673744095219, -0.30709319886556197, 0.34873132089213016, 0.10813020720266767, 0.16746950179766562, 0.005749798770393094, 0.025954779507892746, -0.10392998284923154, 0.003744310034239935, -0.0370550939302531, -0.19553225851174624, 0.026449303769867025, 0.16194419554554887, 0.1160334644335953, 0.20742273833903094, -0.3765513465529488, -0.21531485913381462, 0.20279153454447946, 0.13403688370993722, 0.1701434829766156, 0.020600753918951078, -0.2911026960599326, 0.04470733624522484, -0.1623098641078198, -0.08105745459456117, -0.13249557843852428, 0.034945031178311534, -0.051678065706284776, -0.35870466410603014, 0.2434826076090347, -0.019370389713590303, -0.02475920200137602, -0.00013947142231758805, -0.092023170073404, -0.0763926672384954, 0.014763014811661935, 0.16992325111547665, 0.025570971782379333, 0.17390867558893777, -0.15139398629716813, -0.03334927134546301, 0.3697500338237132, -0.2447787822841952, -0.12438389471912335, -0.004415381681023826, -0.21328869842052942, -0.15334855532179767, 0.03848441420836201, 0.17041586992150592, 0.09306913297698502, -0.08043434336451033, 0.17512770835920463, 0.15384505163773052, 0.21287891851933372, 0.15684716883134248, 0.08619390807965124, 0.2636966068342689, 0.0648357407171129, 0.10329828302060524, 0.13203767895925744, -0.08325552308721648, -0.04256062395495152, -0.3959118799126196, -0.0395215647555937, -0.20012447305564438, 0.09020287359523918, -0.22623950028155965, -0.19713117569617386, 0.4348351985456482, 0.15971308305198628, 0.17435591567247624, 0.0902470892882951, 0.3221090051736082, 0.14336416432014365, 0.013339624586214701, 0.03150106934950717, 0.3346607174063402, 0.1901135754606296, 0.08877865287415203, -0.21314349103035526, 0.027734520071516593, -0.017740354617877353] |
709.2546 | Generalized Fubini instantons | We show that $(1+2)$ nonlinear Klein-Gordon equation with negative coupling
admits an exact solution which appears to be the linear superposition of the
plane wave and the nonsingular rational soliton. We show that the same approach
allows to construct the solution of similar properties for the Euclidean
$\phi^4$ model with broken symmetry. Interestingly, this regular solution will
be of instanton type only in the $D\le 5$ Euclidean space.
| hep-th | we show that 12 nonlinear kleingordon equation with negative coupling admits an exact solution which appears to be the linear superposition of the plane wave and the nonsingular rational soliton we show that the same approach allows to construct the solution of similar properties for the euclidean phi4 model with broken symmetry interestingly this regular solution will be of instanton type only in the dle 5 euclidean space | [['we', 'show', 'that', '12', 'nonlinear', 'kleingordon', 'equation', 'with', 'negative', 'coupling', 'admits', 'an', 'exact', 'solution', 'which', 'appears', 'to', 'be', 'the', 'linear', 'superposition', 'of', 'the', 'plane', 'wave', 'and', 'the', 'nonsingular', 'rational', 'soliton', 'we', 'show', 'that', 'the', 'same', 'approach', 'allows', 'to', 'construct', 'the', 'solution', 'of', 'similar', 'properties', 'for', 'the', 'euclidean', 'phi4', 'model', 'with', 'broken', 'symmetry', 'interestingly', 'this', 'regular', 'solution', 'will', 'be', 'of', 'instanton', 'type', 'only', 'in', 'the', 'dle', '5', 'euclidean', 'space']] | [-0.1557772805886891, 0.09346306105747798, -0.08819349065614755, 0.07745486367938985, -0.12369795921532546, -0.17765681248377352, -0.05281287004404208, 0.3277269033167292, -0.26548078276819603, -0.21694678558474956, 0.09137967375949409, -0.2863178990461593, -0.2052059330333791, 0.1250171486308853, 0.008962731246891268, 0.024594326955540216, 0.010154554230051445, 0.07031488852054976, -0.1159858685123789, -0.2604003122952931, 0.3433496828108807, -0.04715757422587451, 0.2553851874956094, 0.013905474566854537, 0.13815140476457172, 0.00041541100397486896, 0.06664525777758921, 0.028200989458555877, -0.15463095551732456, 0.06872164865147651, 0.22680853569524034, 0.08070869239814141, 0.18069144896820516, -0.4128211743253119, -0.21067722918301382, 0.12806839812957846, 0.18909716434941135, 0.16284316571888185, -0.04731452225378769, -0.27582285339731777, 0.08791155302349259, -0.1280155889073606, -0.2491449744796709, -0.06906107381634202, 0.0206421033534057, 0.005621369681595003, -0.25948962928069863, 0.0830991763060036, 0.06401472830689539, -0.05493118813918794, -0.12222555070269771, -0.0376308335141991, -0.05895791769794682, 0.04179311434135718, 0.042378950259744134, 0.07573255512397736, 0.0003521510773091851, -0.08483392360058668, -0.09639031460563488, 0.3933472676777883, -0.11327678173342172, -0.271682652316111, 0.12905483694254039, -0.16477149785222375, -0.08013914800454479, 0.15225076170377982, 0.11697786624598153, 0.1487391410388655, -0.09094007461167433, 0.16965893320379752, -0.06311511619316983, 0.19924453653134955, 0.10352766663109993, -0.004379634765962905, 0.15490840109722578, 0.09704216087565702, 0.1086262845338377, 0.14508487472844803, -0.017755658906774923, -0.1427141074091196, -0.35014518862590194, -0.15077053730013124, -0.15953781075864648, 0.12646334281474564, -0.1682943779808685, -0.19898213543381324, 0.378873296732576, 0.09464351701385834, 0.16815803999848225, 0.08146893003482975, 0.19982482229962067, 0.17976204010055347, 0.0386939071570797, 0.07920357560300652, 0.25217181720140885, 0.08637143976760425, 0.05656303646152511, -0.22926076815929264, -0.08329725204556085, 0.13048827961114617] |
709.2547 | Prospects for (non-SUSY) new physics with first LHC data | The ATLAS and CMS experiments will take first data soon. I consider here the
prospects for new physics (excluding SUSY) with a few inverse fb of data. This
means processes with signal cross sections of a few 100 fb or less, with clear
and fairly simple signatures - precision comparison of data to Standard Model
tails will take longer, needing more luminosity and very good understanding of
detector calibrations, resolutions and trigger efficiencies. The approach I
take here is signature rather than model based, but examples of models will be
given.
| hep-ex hep-ph | the atlas and cms experiments will take first data soon i consider here the prospects for new physics excluding susy with a few inverse fb of data this means processes with signal cross sections of a few 100 fb or less with clear and fairly simple signatures precision comparison of data to standard model tails will take longer needing more luminosity and very good understanding of detector calibrations resolutions and trigger efficiencies the approach i take here is signature rather than model based but examples of models will be given | [['the', 'atlas', 'and', 'cms', 'experiments', 'will', 'take', 'first', 'data', 'soon', 'i', 'consider', 'here', 'the', 'prospects', 'for', 'new', 'physics', 'excluding', 'susy', 'with', 'a', 'few', 'inverse', 'fb', 'of', 'data', 'this', 'means', 'processes', 'with', 'signal', 'cross', 'sections', 'of', 'a', 'few', '100', 'fb', 'or', 'less', 'with', 'clear', 'and', 'fairly', 'simple', 'signatures', 'precision', 'comparison', 'of', 'data', 'to', 'standard', 'model', 'tails', 'will', 'take', 'longer', 'needing', 'more', 'luminosity', 'and', 'very', 'good', 'understanding', 'of', 'detector', 'calibrations', 'resolutions', 'and', 'trigger', 'efficiencies', 'the', 'approach', 'i', 'take', 'here', 'is', 'signature', 'rather', 'than', 'model', 'based', 'but', 'examples', 'of', 'models', 'will', 'be', 'given']] | [-0.023603592189869637, 0.10849706714765893, -0.08651605049251682, 0.13479308001697063, -0.09460187528489364, -0.19580567879602312, 0.03270509019494057, 0.4099113485879368, -0.20379178701194986, -0.36796666156086655, 0.10618754391713689, -0.3091492298550697, -0.023220849795163506, 0.23960078603381085, -0.002791310018963284, 0.03301438620934884, 0.14900753105887107, -0.01149599493170778, -0.09536919305101037, -0.2199753214113621, 0.25136331610588564, 0.1495090442399184, 0.1951946575815479, 0.0526691247191694, 0.06228893895814609, -0.040052084424921, -0.08961778640126189, -0.01626109936171108, -0.12127241159582304, 0.08297166283138924, 0.24977313836494028, 0.15082665618716015, 0.2002970275986526, -0.45734623612629044, -0.13658325580165384, 0.15718144774695653, 0.12731599119595355, 0.09656813901124729, -0.09084227151163052, -0.26727922718144126, 0.08888950814984532, -0.22378030740138558, -0.09203708756508099, -0.06602491462706692, 0.03258676464772887, -0.04209452161254982, -0.2714311090401477, 0.08520117297885008, 0.03222582808488773, 0.09386326728595627, -0.014247457245882186, -0.15007750975734477, 0.015512984147709278, 0.04309450583791153, 0.027748844440146865, -0.01260186748372184, 0.14015518155776793, -0.15952590212174173, -0.1586984564912402, 0.37836383947740415, -0.04205253607829541, -0.1478869534201092, 0.21944715256750996, -0.2043575013263358, -0.10936831804251092, 0.14466767093787591, 0.20006760261538956, 0.08410065401759413, -0.20254709706124333, 0.030846854338111976, 0.0328810443998211, 0.1992003033662008, 0.02111651064414117, 0.051732954056933525, 0.2196418543941238, 0.27697730732874737, 0.030290509897491172, 0.026314824373306085, -0.15773457654286177, -0.041600808640941976, -0.39465962627695667, -0.10964706285546223, -0.08851800627696017, 0.05434481594711542, -0.04356267383748976, -0.06360467423995336, 0.3687907979461468, 0.1737347383466032, 0.296875482176741, 0.06812970693378399, 0.28840806420323334, 0.09078234703176552, 0.10648087244480849, 0.00876372075225744, 0.26420513447374105, 0.07251486062175698, 0.11328433477837178, -0.06443244630904196, 0.038094254867691135, -0.030861717695370317] |
709.2548 | Controlling Fano Profiles via Conical Intersections | An ab initio analytical model for Fano resonances in two-channel systems is
presented. We find that the lineshape parameter q factors into a background
contribution q_b that depends only on the uncoupled channels and an interaction
contribution q_i that is affected by the coupling between the channels,
revealing how the overall lineshape parameter q may be controlled. In
particular, we show how conical intersections of the background phase shifts
have an important role in the interplay between q_b and q_i. Finally, control
of Fano transmission profiles through q_b and q_i is demonstrated for quantum
billiards.
| cond-mat.mes-hall quant-ph | an ab initio analytical model for fano resonances in twochannel systems is presented we find that the lineshape parameter q factors into a background contribution q_b that depends only on the uncoupled channels and an interaction contribution q_i that is affected by the coupling between the channels revealing how the overall lineshape parameter q may be controlled in particular we show how conical intersections of the background phase shifts have an important role in the interplay between q_b and q_i finally control of fano transmission profiles through q_b and q_i is demonstrated for quantum billiards | [['an', 'ab', 'initio', 'analytical', 'model', 'for', 'fano', 'resonances', 'in', 'twochannel', 'systems', 'is', 'presented', 'we', 'find', 'that', 'the', 'lineshape', 'parameter', 'q', 'factors', 'into', 'a', 'background', 'contribution', 'q_b', 'that', 'depends', 'only', 'on', 'the', 'uncoupled', 'channels', 'and', 'an', 'interaction', 'contribution', 'q_i', 'that', 'is', 'affected', 'by', 'the', 'coupling', 'between', 'the', 'channels', 'revealing', 'how', 'the', 'overall', 'lineshape', 'parameter', 'q', 'may', 'be', 'controlled', 'in', 'particular', 'we', 'show', 'how', 'conical', 'intersections', 'of', 'the', 'background', 'phase', 'shifts', 'have', 'an', 'important', 'role', 'in', 'the', 'interplay', 'between', 'q_b', 'and', 'q_i', 'finally', 'control', 'of', 'fano', 'transmission', 'profiles', 'through', 'q_b', 'and', 'q_i', 'is', 'demonstrated', 'for', 'quantum', 'billiards']] | [-0.2166792762808894, 0.13972858910274227, -0.06890059362508749, 0.046480379879817756, 0.004706198727025797, -0.18387255128963212, 0.044819491756099616, 0.3969707569401515, -0.23683320511328546, -0.24401192234731034, -0.0251621840411405, -0.31098216686299757, -0.20418455672303312, 0.18238885894564813, -0.0057214390216885425, -0.02680432342581059, 0.01068027394480611, 0.013868400327077037, -0.025339904704474305, -0.18101574383479985, 0.36593819986538667, 0.05657166103758898, 0.2555828388192152, 0.11963817999578742, 0.04506217793218399, 0.03656925682076498, 0.03331736835994219, -0.01099418784050565, -0.17271593027666984, 0.03929431862442901, 0.2524286569249326, 0.056587882560530774, 0.17684465060990892, -0.3814205945910592, -0.16262000453119216, 0.0682302538256504, 0.22739669194101894, 0.100164347857629, -0.04789281575327837, -0.2597826273425629, 0.023402965436444472, -0.13496826479309484, -0.11005676136303105, -0.08128964484816319, 0.07451776152378635, 0.002404435694609818, -0.3119490547007636, 0.08630537280910894, 0.08009800614887162, 0.053898293877902785, -0.024735330729010074, -0.1163441027343077, -0.04563990145137436, 0.1298613729298507, 0.007148457670241202, -3.133681357691162e-05, 0.1677855718194654, -0.13144927336589285, -0.09647226814474714, 0.3480936561368014, -0.07330335836771777, -0.23832526727530517, 0.08147804019482512, -0.15141248478015001, -0.05221461979672313, 0.14376263193001873, 0.15070802699774505, 0.06800414033074814, -0.09736737751058842, 0.11770261855318064, 0.01087381892690533, 0.20023460658512227, 0.051594983394208704, 0.044316607698994245, 0.18188643246693045, 0.0970689775103605, 0.03427359526731858, 0.11731770519338744, -0.0776473670683213, -0.10587271726445148, -0.3235839737089057, -0.08735979412143167, -0.1532342614311921, 0.06112296070021234, -0.09899583684822764, -0.10211047652226529, 0.3779102158781729, 0.1213128802182741, 0.2647293743236285, -0.06880630922601803, 0.2802824383503512, 0.14215707524410007, 0.012168515395177038, 0.023863575867328204, 0.295409449180098, 0.15479615775035008, -0.009702399588729206, -0.3228166291686265, 0.04461138400396234, -0.03297715332898262] |
709.2549 | Evidence of longterm cyclic evolution of radio pulsar periods | The measurements of pulsar frequency second derivatives have shown that they
are 1e2...1e6 times larger than expected for standard pulsar spin-down law.
Moreover, the second derivatives as well as braking indices are even negative
for about half the pulsars. We explain these paradoxical results on the basis
of the statistical analysis of the rotational parameters f0, f1 and f2 of the
subset of 295 pulsars taken mostly from the ATNF database. We have found a
strong correlation between f2 and f1 for both f2 > 0 (correlation coefficient r
~ 0.9) and f2 < 0 (r ~ 0.85), as well as between f0 and f1 (r ~ 0.6...0.7). We
interpret these dependencies as evolutionary ones due to f1 being nearly
proportional to the pulsars' age.
The derived statistical relations as well as "anomalous" values of f2 are
well described by assuming the existence of long-time variations of the
spin-down rate. The pulsar frequency evolution, therefore, consists of secular
change of f0_{ev}(t), f1_{ev}(t) and f2_{ev}(t) according to the power law with
n ~ 5, the irregularities, observed within the timespan as timing noise, and
the non-monotonous variations on the timescale of several tens of years, which
is larger than that of the timespan. It is possible that the nature of
long-term variations is similar to that of short-term ones. The idea of
non-constant secular pulsars' braking index n is also analysed.
| astro-ph | the measurements of pulsar frequency second derivatives have shown that they are 1e21e6 times larger than expected for standard pulsar spindown law moreover the second derivatives as well as braking indices are even negative for about half the pulsars we explain these paradoxical results on the basis of the statistical analysis of the rotational parameters f0 f1 and f2 of the subset of 295 pulsars taken mostly from the atnf database we have found a strong correlation between f2 and f1 for both f2 0 correlation coefficient r 09 and f2 0 r 085 as well as between f0 and f1 r 0607 we interpret these dependencies as evolutionary ones due to f1 being nearly proportional to the pulsars age the derived statistical relations as well as anomalous values of f2 are well described by assuming the existence of longtime variations of the spindown rate the pulsar frequency evolution therefore consists of secular change of f0_evt f1_evt and f2_evt according to the power law with n 5 the irregularities observed within the timespan as timing noise and the nonmonotonous variations on the timescale of several tens of years which is larger than that of the timespan it is possible that the nature of longterm variations is similar to that of shortterm ones the idea of nonconstant secular pulsars braking index n is also analysed | [['the', 'measurements', 'of', 'pulsar', 'frequency', 'second', 'derivatives', 'have', 'shown', 'that', 'they', 'are', '1e21e6', 'times', 'larger', 'than', 'expected', 'for', 'standard', 'pulsar', 'spindown', 'law', 'moreover', 'the', 'second', 'derivatives', 'as', 'well', 'as', 'braking', 'indices', 'are', 'even', 'negative', 'for', 'about', 'half', 'the', 'pulsars', 'we', 'explain', 'these', 'paradoxical', 'results', 'on', 'the', 'basis', 'of', 'the', 'statistical', 'analysis', 'of', 'the', 'rotational', 'parameters', 'f0', 'f1', 'and', 'f2', 'of', 'the', 'subset', 'of', '295', 'pulsars', 'taken', 'mostly', 'from', 'the', 'atnf', 'database', 'we', 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'several', 'tens', 'of', 'years', 'which', 'is', 'larger', 'than', 'that', 'of', 'the', 'timespan', 'it', 'is', 'possible', 'that', 'the', 'nature', 'of', 'longterm', 'variations', 'is', 'similar', 'to', 'that', 'of', 'shortterm', 'ones', 'the', 'idea', 'of', 'nonconstant', 'secular', 'pulsars', 'braking', 'index', 'n', 'is', 'also', 'analysed']] | [-0.1175139559046577, 0.15055560642345386, -0.03110709203386002, 0.11714377800129692, -0.05445887513289398, -0.09415568489454348, 0.03841619451466778, 0.36059960375793954, -0.23069466135295277, -0.36904465740715914, 0.1026722949612039, -0.28268341400067915, -0.08881713745861568, 0.24354992223961744, -0.014576719755264507, -0.0036125164081485393, 0.01626114514762197, 0.0477756995242089, -0.057893899027311076, -0.21993904441405904, 0.24467900204842657, 0.040917861346282405, 0.1848056324926967, -0.014776926501442425, 0.07075075571086596, -0.07471142277195626, -0.02866756191122642, -0.011662311296657374, -0.09743413255068431, 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709.255 | The Monoceros very-high-energy gamma-ray source | The H.E.S.S. telescope array has observed the complex Monoceros Loop
SNR/Rosette Nebula region which contains unidentified high energy EGRET sources
and potential very-high-energy (VHE) gamma-ray source. We announce the
discovery of a new point-like VHE gamma-ray sources, HESS J0632+057. It is
located close to the rim of the Monoceros SNR and has no clear counterpart at
other wavelengths. Data from the NANTEN telescope have been used to investigate
hadronic interactions with nearby molecular clouds. We found no evidence for a
clear association. The VHE gamma-ray emission is possibly associated with the
lower energy gamma-ray source 3EG J0634+0521, a weak X-ray source 1RXS
J063258.3+054857 and the Be-star MWC 148.
| astro-ph | the hess telescope array has observed the complex monoceros loop snrrosette nebula region which contains unidentified high energy egret sources and potential veryhighenergy vhe gammaray source we announce the discovery of a new pointlike vhe gammaray sources hess j0632057 it is located close to the rim of the monoceros snr and has no clear counterpart at other wavelengths data from the nanten telescope have been used to investigate hadronic interactions with nearby molecular clouds we found no evidence for a clear association the vhe gammaray emission is possibly associated with the lower energy gammaray source 3eg j06340521 a weak xray source 1rxs j0632583054857 and the bestar mwc 148 | [['the', 'hess', 'telescope', 'array', 'has', 'observed', 'the', 'complex', 'monoceros', 'loop', 'snrrosette', 'nebula', 'region', 'which', 'contains', 'unidentified', 'high', 'energy', 'egret', 'sources', 'and', 'potential', 'veryhighenergy', 'vhe', 'gammaray', 'source', 'we', 'announce', 'the', 'discovery', 'of', 'a', 'new', 'pointlike', 'vhe', 'gammaray', 'sources', 'hess', 'j0632057', 'it', 'is', 'located', 'close', 'to', 'the', 'rim', 'of', 'the', 'monoceros', 'snr', 'and', 'has', 'no', 'clear', 'counterpart', 'at', 'other', 'wavelengths', 'data', 'from', 'the', 'nanten', 'telescope', 'have', 'been', 'used', 'to', 'investigate', 'hadronic', 'interactions', 'with', 'nearby', 'molecular', 'clouds', 'we', 'found', 'no', 'evidence', 'for', 'a', 'clear', 'association', 'the', 'vhe', 'gammaray', 'emission', 'is', 'possibly', 'associated', 'with', 'the', 'lower', 'energy', 'gammaray', 'source', '3eg', 'j06340521', 'a', 'weak', 'xray', 'source', '1rxs', 'j0632583054857', 'and', 'the', 'bestar', 'mwc', '148']] | [-0.1112297127200734, 0.06840745141629928, -0.03954536342560979, 0.19569541964724305, -0.2148851318018777, -0.14125615898963242, 0.05139434268432004, 0.5042347095197155, -0.15114342854524562, -0.3530526654262628, -0.0036439115048519204, -0.3709750040955398, 0.025925894986305917, 0.23011552716738412, 0.02116485778990734, -0.055170455969692694, 0.16397365582718823, -0.06598025153701505, 0.05850968922355345, -0.1554902055400557, 0.21604287242960363, 0.24832384808077698, 0.139245265952888, 0.06628773197797792, 0.12098323262984022, -0.15252880552961004, -0.053155821462028796, -0.12063885332040844, -0.050374768452630156, 0.050464531645134446, 0.25720069811546376, 0.0950752013673385, 0.11328128627723172, -0.2588000703070845, -0.2773305525914544, 0.15626836308233794, 0.14998945338385447, -0.09671108897974981, -0.07285984711987632, -0.4108257039937945, 0.04381468936446167, -0.22101628530349227, -0.25180099514268695, 0.17885408110783568, 0.03413899297870341, 0.03600862324237823, -0.09473835666264807, 0.07418236240655893, -0.07760155522597155, 0.0824562209747022, -0.1979722217656672, -0.11197660820381272, 0.025191170076972674, 0.028955998178571463, 0.0245883560828155, 0.13940584332393927, 0.08849436248447524, -0.13431617454154463, -0.14089835113624022, 0.3723864527596604, -0.004939029416778967, 0.06510820235347464, 0.2733259235819181, -0.23984888653226552, -0.3124633060280411, 0.2928473231693109, 0.09543344490230084, 0.02751472101857265, -0.2118557378294922, 0.08264894443619553, -0.06318195251127084, 0.26817941585821764, 0.06124941884052186, 0.10438842871448113, 0.33811917766219096, 0.1151390966216457, 0.053696361243990916, 0.21554855128716943, -0.43195201937342065, 0.007074275812400239, -0.2712414326877998, -0.04591068040934347, -0.17518396657847224, 0.13459601992563833, -0.06818506745136498, -0.128284792210685, 0.3466757063576508, 0.03155871497334114, 0.13085149802444945, -0.06899654456342216, 0.30193514440519115, 0.06659609000420287, 0.08158782837646349, 0.19989062203981336, 0.40124389033853297, 0.12900103883418654, 0.14845715701757442, -0.15756165451547574, 0.08211886073418316, -0.04535766755718561] |
709.2551 | Counting descent pairs with prescribed colors in the colored permutation
groups | We define new statistics, (c, d)-descents, on the colored permutation groups
Z_r \wr S_n and compute the distribution of these statistics on the elements in
these groups. We use some combinatorial approaches, recurrences, and generating
functions manipulations to obtain our results.
| math.CO math.GR | we define new statistics c ddescents on the colored permutation groups z_r wr s_n and compute the distribution of these statistics on the elements in these groups we use some combinatorial approaches recurrences and generating functions manipulations to obtain our results | [['we', 'define', 'new', 'statistics', 'c', 'ddescents', 'on', 'the', 'colored', 'permutation', 'groups', 'z_r', 'wr', 's_n', 'and', 'compute', 'the', 'distribution', 'of', 'these', 'statistics', 'on', 'the', 'elements', 'in', 'these', 'groups', 'we', 'use', 'some', 'combinatorial', 'approaches', 'recurrences', 'and', 'generating', 'functions', 'manipulations', 'to', 'obtain', 'our', 'results']] | [-0.11303696357645095, 0.11745562424184755, -0.14392053452320397, 0.1262204241938889, -0.0622826712904498, -0.0735385305248201, 0.09203595118597149, 0.3918514272198081, -0.29700035247951745, -0.27819847913924606, 0.07615438411885407, -0.28621320249512794, -0.16029924326576292, 0.21922215148806573, -0.0827512922231108, 0.00238402527756989, 0.032032337633427235, 0.04773037955164909, -0.10633806761161395, -0.32095209769904615, 0.32379788886755706, -0.06111567078623921, 0.21780086860526354, -0.02989673214033246, 0.04105891747167334, 0.02809894207166508, -0.13299977894639597, -0.07965253120637499, -0.19825092726387084, 0.16317104157060386, 0.18110755332745612, 0.16877537386026234, 0.14869553800672292, -0.35370427891612055, -0.10898278728127479, 0.16893581449985504, 0.1371652303962037, 0.0922149155754596, -0.08536012943950481, -0.2759256962686777, 0.109004716493655, -0.1838319667847827, -0.0800496676005423, -0.1299498080275953, 0.03128109601093456, 0.10537828928790986, -0.2521948978304863, 0.001020811207126826, 0.020715895888861267, 0.09354862561449409, 0.036037040525116026, -0.20744568724185228, 0.06651076420093886, 0.15514772717142478, 0.007117853779345751, -0.07363772764801979, 0.11473800300154835, -0.14841158892959355, -0.17021355736069382, 0.37702414726372807, 0.011054508853703737, -0.2407527303788811, 0.20074659804813563, -0.1771465497353347, -0.28131010991055516, 0.05957569947931916, 0.19831681333016604, 0.16785879442468285, -0.06240759899374097, 0.035673830562154764, -0.12017872678115964, 0.08315020534209908, 0.09684216550085693, 0.03514996313024312, 0.16814465885981916, -0.01620838837698102, 0.013069341238588095, 0.16335141352028587, -0.03459093230776489, -0.014938324107788503, -0.3497453721240163, -0.14515681960619986, -0.15150597194442525, 0.061706764821428804, -0.14474230490086484, -0.18781194781186059, 0.4414923069009092, 0.1726591545622796, 0.1802142609441944, 0.17266200720332564, 0.19592274550232106, 0.11885558684880379, 0.08673092095705215, 0.03553033452481032, 0.026378823773848127, 0.22744259610772133, -0.023316118377260865, -0.15538445052225142, 0.005865229485789314, 0.15720906691858544] |
709.2552 | Observational appearances of isolated stellar-mass black hole accretion
- theory and observations | General properties of accretion onto isolated stellar mass black holes in the
Galaxy are discussed. An analysis of plasma internal energy growth during the
infall is performed. Adiabatic heating of collisionless accretion flow due to
magnetic adiabatic invariant conservation is 25% more efficient than in the
standard non-magnetized gas case. It is shown that magnetic field line
reconnections in discrete current sheets lead to significant nonthermal
electron component formation, which leads to a formation of a hard (UV, X-ray,
up to gamma), highly variable spectral component in addition to the standard
synchrotron optical component first derived by Shvartsman generated by thermal
electrons in the magnetic field of the accretion flow. Properties of accretion
flow emission variability are discussed. Observation results of two single
black hole candidates - gravitational lens MACHO-1999-BLG-22 and radio-loud
x-ray source with featureless optical spectrum J1942+10 - in optical band with
high temporal resolution are presented and interpreted in the framework of the
proposed model.
| astro-ph | general properties of accretion onto isolated stellar mass black holes in the galaxy are discussed an analysis of plasma internal energy growth during the infall is performed adiabatic heating of collisionless accretion flow due to magnetic adiabatic invariant conservation is 25 more efficient than in the standard nonmagnetized gas case it is shown that magnetic field line reconnections in discrete current sheets lead to significant nonthermal electron component formation which leads to a formation of a hard uv xray up to gamma highly variable spectral component in addition to the standard synchrotron optical component first derived by shvartsman generated by thermal electrons in the magnetic field of the accretion flow properties of accretion flow emission variability are discussed observation results of two single black hole candidates gravitational lens macho1999blg22 and radioloud xray source with featureless optical spectrum j194210 in optical band with high temporal resolution are presented and interpreted in the framework of the proposed model | [['general', 'properties', 'of', 'accretion', 'onto', 'isolated', 'stellar', 'mass', 'black', 'holes', 'in', 'the', 'galaxy', 'are', 'discussed', 'an', 'analysis', 'of', 'plasma', 'internal', 'energy', 'growth', 'during', 'the', 'infall', 'is', 'performed', 'adiabatic', 'heating', 'of', 'collisionless', 'accretion', 'flow', 'due', 'to', 'magnetic', 'adiabatic', 'invariant', 'conservation', 'is', '25', 'more', 'efficient', 'than', 'in', 'the', 'standard', 'nonmagnetized', 'gas', 'case', 'it', 'is', 'shown', 'that', 'magnetic', 'field', 'line', 'reconnections', 'in', 'discrete', 'current', 'sheets', 'lead', 'to', 'significant', 'nonthermal', 'electron', 'component', 'formation', 'which', 'leads', 'to', 'a', 'formation', 'of', 'a', 'hard', 'uv', 'xray', 'up', 'to', 'gamma', 'highly', 'variable', 'spectral', 'component', 'in', 'addition', 'to', 'the', 'standard', 'synchrotron', 'optical', 'component', 'first', 'derived', 'by', 'shvartsman', 'generated', 'by', 'thermal', 'electrons', 'in', 'the', 'magnetic', 'field', 'of', 'the', 'accretion', 'flow', 'properties', 'of', 'accretion', 'flow', 'emission', 'variability', 'are', 'discussed', 'observation', 'results', 'of', 'two', 'single', 'black', 'hole', 'candidates', 'gravitational', 'lens', 'macho1999blg22', 'and', 'radioloud', 'xray', 'source', 'with', 'featureless', 'optical', 'spectrum', 'j194210', 'in', 'optical', 'band', 'with', 'high', 'temporal', 'resolution', 'are', 'presented', 'and', 'interpreted', 'in', 'the', 'framework', 'of', 'the', 'proposed', 'model']] | [-0.10137944547467043, 0.1498559652911779, -0.04613234289292875, 0.10187442704215767, -0.0692730739942522, -0.08385272378513178, -0.03834640077396913, 0.4358344941623751, -0.21960495234551755, -0.33329016972913755, 0.05338661686000233, -0.2544353753751652, -0.00013778805611776068, 0.2358007108106266, 0.002983277705921368, 0.0354068384161098, 0.027328585315338494, -0.07527000146204388, -0.02389287063096009, -0.18658543910903783, 0.2989283278803704, 0.10637822062345584, 0.23432229600193633, 0.010512965465230601, 0.04033828769242028, -0.04689069499198178, -0.05360229605432394, 0.0072240591345524244, -0.1139717558645942, 0.05436792002700559, 0.2032412542786159, 0.0416985311970272, 0.18522114841896412, -0.42096531423347, -0.28179945575690213, 0.026518104718877125, 0.16767799266154407, 0.041617554953388335, -0.10583590701429926, -0.2080563686518966, 0.04869547811512194, -0.20981517111785808, -0.14484795937677483, 0.004866619837809016, 0.0304523577336101, -0.0002987511140784225, -0.22953504149487555, 0.16530928422708985, 0.08086941640615439, 0.01058935508277122, -0.14320405616497547, 0.011341679520003933, -0.09455712487945309, 0.014734384222802792, 0.10467859578675888, 0.06133979995880131, 0.24734352216088248, -0.14661937413204992, -0.10047555187801746, 0.41234115411394406, -0.07746457230413481, -0.060770051868317965, 0.21086762714737953, -0.22769796654321978, -0.1265614333429507, 0.2411022587836563, 0.1422623287940809, 0.10900265098755042, -0.14036150266380085, 0.0031894830685991844, -0.002603664177820667, 0.17608254980568036, 0.05865233202537449, 0.04667011489413222, 0.35822876121292446, 0.1432307607799696, 0.010676389185155366, 0.15079736011253983, -0.1702729866200417, -0.05093069973873434, -0.23196140500148396, -0.08801789829158224, -0.15905313625290698, 0.11409003506550662, -0.10636019412796285, -0.16963201348254814, 0.3728602122479155, 0.08596565637906844, 0.17431850258454487, -0.05125931878770738, 0.3336788673607405, 0.14561864947930414, 0.030245007552484705, 0.14730428195219825, 0.3281446047877143, 0.20810187944700917, 0.12719417242454245, -0.2700719192908327, -0.005107856924077133, 0.039040561045774004] |
709.2553 | Chemodynamical evolution of interacting galaxies: the GalMer view | We have undertaken a large set of simulations of galaxy interactions and
mergers (GalMer Project) in order to study the physical processes related to
galaxy encounters. All morphological types along the Hubble sequence are
considered in the initial conditions of the two colliding galaxies, with
varying bulge-to-disk ratios and gas mass fractions. Different types of orbits
are simulated, direct and retrograde, according to the initial relative energy
and impact parameter. The self gravity of stars, gas and dark matter is taken
into account through a tree-code algorithm, the gas hydrodynamics through SPH.
Star formation is included adopting a density-dependent Schmidt law. This wide
library of galaxy interactions and mergers, containing, at present, about 900
simulations of major encounters, represents an unique tool to investigate
statistically the chemodynamical evolution of interacting systems. In the
following, we present and discuss some results obtained exploring the dataset,
together with some future perspectives.
| astro-ph | we have undertaken a large set of simulations of galaxy interactions and mergers galmer project in order to study the physical processes related to galaxy encounters all morphological types along the hubble sequence are considered in the initial conditions of the two colliding galaxies with varying bulgetodisk ratios and gas mass fractions different types of orbits are simulated direct and retrograde according to the initial relative energy and impact parameter the self gravity of stars gas and dark matter is taken into account through a treecode algorithm the gas hydrodynamics through sph star formation is included adopting a densitydependent schmidt law this wide library of galaxy interactions and mergers containing at present about 900 simulations of major encounters represents an unique tool to investigate statistically the chemodynamical evolution of interacting systems in the following we present and discuss some results obtained exploring the dataset together with some future perspectives | [['we', 'have', 'undertaken', 'a', 'large', 'set', 'of', 'simulations', 'of', 'galaxy', 'interactions', 'and', 'mergers', 'galmer', 'project', 'in', 'order', 'to', 'study', 'the', 'physical', 'processes', 'related', 'to', 'galaxy', 'encounters', 'all', 'morphological', 'types', 'along', 'the', 'hubble', 'sequence', 'are', 'considered', 'in', 'the', 'initial', 'conditions', 'of', 'the', 'two', 'colliding', 'galaxies', 'with', 'varying', 'bulgetodisk', 'ratios', 'and', 'gas', 'mass', 'fractions', 'different', 'types', 'of', 'orbits', 'are', 'simulated', 'direct', 'and', 'retrograde', 'according', 'to', 'the', 'initial', 'relative', 'energy', 'and', 'impact', 'parameter', 'the', 'self', 'gravity', 'of', 'stars', 'gas', 'and', 'dark', 'matter', 'is', 'taken', 'into', 'account', 'through', 'a', 'treecode', 'algorithm', 'the', 'gas', 'hydrodynamics', 'through', 'sph', 'star', 'formation', 'is', 'included', 'adopting', 'a', 'densitydependent', 'schmidt', 'law', 'this', 'wide', 'library', 'of', 'galaxy', 'interactions', 'and', 'mergers', 'containing', 'at', 'present', 'about', '900', 'simulations', 'of', 'major', 'encounters', 'represents', 'an', 'unique', 'tool', 'to', 'investigate', 'statistically', 'the', 'chemodynamical', 'evolution', 'of', 'interacting', 'systems', 'in', 'the', 'following', 'we', 'present', 'and', 'discuss', 'some', 'results', 'obtained', 'exploring', 'the', 'dataset', 'together', 'with', 'some', 'future', 'perspectives']] | [-0.13479922192863458, 0.09431173669374719, -0.1129242010928703, 0.08126906451578533, -0.060482022974440115, -0.0518276031447837, -0.022723457801011985, 0.3770493736253089, -0.18993859159316392, -0.35645534410985225, 0.035322675181805915, -0.27527385799451765, -0.02590655181408491, 0.19803626629080148, 0.0266608976752766, 0.019452806283257303, 0.10994729114033831, -0.0884939050770696, -0.04299160549042109, -0.2840459290829381, 0.36100899368437045, 0.060232997475029436, 0.1421710582537539, -0.014341912501110327, 0.09709061360636713, -0.05221013736523588, -0.12472540596750059, 0.003956365953353874, -0.21232872398788166, 0.014425324115139627, 0.2021700653681944, 0.13570062720666845, 0.2699110334623455, -0.40389782397839047, -0.1931063075824922, 0.0789239850089004, 0.1743820410209314, 0.09313400486334159, -0.12346510894615328, -0.28153372448462766, 0.04452623581105918, -0.2252749310651694, -0.14736086049198405, 0.00026122255613339826, 0.02235433692112565, 0.06991098602083605, -0.24012599694823858, 0.11398715823154347, -0.004989139624508395, 0.042917554991807313, -0.10935119968907744, -0.10543288891172449, -0.05041895266278528, 0.1285504483345946, 0.03633603636228523, 0.018261258766186367, 0.19013175628641807, -0.13057813170403493, -0.04257838639911989, 0.4532432162809192, -0.04071841857805473, -0.09599804911362445, 0.2935533491994611, -0.1865528079637345, -0.16017813228020733, 0.0981474624440424, 0.2207291142424356, 0.05739013550768102, -0.17234509122314168, 0.008057286335083487, 0.007051435199209908, 0.1500074322641696, 0.025585954446320565, 0.0049397163611685155, 0.31462430507069666, 0.16441345858018871, -0.019879508802617258, 0.1147193745881844, -0.10745095600367792, -0.09992466296300592, -0.25427407104656374, -0.1271320484803627, -0.11190322259106616, 0.037056671046095606, -0.12639076676133368, -0.10363204109688733, 0.35089304704131596, 0.1305842315121835, 0.20894015299143806, 0.0336787089574207, 0.2896253936080225, 0.033337801410570495, 0.07227277926688126, 0.05566309472458474, 0.24728083443841992, 0.16019021663752278, 0.0697199915349796, -0.2600016200261803, 0.030028593078847105, 0.01338607009075232] |
709.2554 | New physics in Bs decays to J/psi and phi | This paper is concerned with the physics of meson decays to J/psi and
phi.These decays have been observed at the Tevatron [7] and, in particular,
should be copiously observed at the LHCb detector. This paper gives a concise
presentation of the basic physics analysis and a general formalism for
analyzing the signals of CP violation.
| hep-ph | this paper is concerned with the physics of meson decays to jpsi and phithese decays have been observed at the tevatron 7 and in particular should be copiously observed at the lhcb detector this paper gives a concise presentation of the basic physics analysis and a general formalism for analyzing the signals of cp violation | [['this', 'paper', 'is', 'concerned', 'with', 'the', 'physics', 'of', 'meson', 'decays', 'to', 'jpsi', 'and', 'phithese', 'decays', 'have', 'been', 'observed', 'at', 'the', 'tevatron', '7', 'and', 'in', 'particular', 'should', 'be', 'copiously', 'observed', 'at', 'the', 'lhcb', 'detector', 'this', 'paper', 'gives', 'a', 'concise', 'presentation', 'of', 'the', 'basic', 'physics', 'analysis', 'and', 'a', 'general', 'formalism', 'for', 'analyzing', 'the', 'signals', 'of', 'cp', 'violation']] | [-0.04101906799607807, 0.20780076947132195, -0.13740208308660873, 0.1309925211589197, -0.09579861812569478, -0.151851839127226, -0.0047291226305619435, 0.22731303996234029, -0.20409082807600498, -0.2745524445824601, 0.019930803188967897, -0.36391209553133835, -0.05082328793489271, 0.14096103514182484, 0.023942667352794496, 0.0751174123854273, 0.09269635903614538, 0.01629576059403243, -0.08581222460984632, -0.20735724099601308, 0.2499029614134795, 0.05919104559278047, 0.2136579587779663, 0.13467042646543295, 0.010076706884083924, -0.013947066186961753, -0.07860011283170294, 0.00030213950150128867, -0.13434372533595673, 0.07694364430520821, 0.304534336965945, 0.17935211892256997, 0.16952433481950452, -0.3752200911166491, -0.08775111520662904, 0.16480440175574687, 0.16831951798371006, 0.12381584337142865, -0.09825775046246471, -0.3402265406869076, 0.14348089429377406, -0.17707717640290935, -0.1026652968764581, -0.037271217753489815, 0.03501039228609039, -0.1026953461545485, -0.29877953779780203, 0.042074079590815085, -0.03371847627891435, 0.11794248377662842, 0.04167645909237089, -0.1688355314696242, 0.06503982626384607, 0.003467007453932806, 0.12047896839040159, 0.08425213935509047, 0.11704232688579294, -0.11277277383918839, -0.16867355443537235, 0.40317394239483056, 0.0019575104514067926, -0.12859476443932014, 0.17128458596697008, -0.23591062011783598, -0.19871784286159608, 0.11654361972102413, 0.25541864797748903, 0.050164934178745305, -0.24832828899983456, 0.12718505468930946, -0.0347931193601754, 0.12104342788181922, 0.06939107867785627, 0.1117330087937363, 0.20804872298699426, 0.2515387219954627, -0.03145392878515715, 0.08550474888222569, -0.05799531759866686, -0.011093435636549085, -0.45337867907882257, -0.15526327096672, -0.09245663477297596, 0.04378891084558779, 0.04917065832085899, -0.034482317045331, 0.46052394690061055, 0.07634645219271381, 0.231952170168774, 0.03415407087757356, 0.3100934617600783, 0.1258844682360413, 0.007529000527466889, 0.05154266461936964, 0.3285384630025537, 0.17464276448030164, 0.2382300954691514, -0.22308470044043605, 0.06844236780199464, 0.017930579440737213] |
709.2555 | Towards the computation of the convex hull of a configuration from its
corresponding separating matrix | In this paper, we cope with the following problem: compute the size of the
convex hull of a configuration C, where the given data is the number of
separating lines between any two points of the configuration (where the lines
are generated by pairs of other points of the configuration).
We give an algorithm for the case that the convex hull is of size 3, and a
partial algorithm and some directions for the case that the convex hull is of
size bigger than 3.
| math.CO | in this paper we cope with the following problem compute the size of the convex hull of a configuration c where the given data is the number of separating lines between any two points of the configuration where the lines are generated by pairs of other points of the configuration we give an algorithm for the case that the convex hull is of size 3 and a partial algorithm and some directions for the case that the convex hull is of size bigger than 3 | [['in', 'this', 'paper', 'we', 'cope', 'with', 'the', 'following', 'problem', 'compute', 'the', 'size', 'of', 'the', 'convex', 'hull', 'of', 'a', 'configuration', 'c', 'where', 'the', 'given', 'data', 'is', 'the', 'number', 'of', 'separating', 'lines', 'between', 'any', 'two', 'points', 'of', 'the', 'configuration', 'where', 'the', 'lines', 'are', 'generated', 'by', 'pairs', 'of', 'other', 'points', 'of', 'the', 'configuration', 'we', 'give', 'an', 'algorithm', 'for', 'the', 'case', 'that', 'the', 'convex', 'hull', 'is', 'of', 'size', '3', 'and', 'a', 'partial', 'algorithm', 'and', 'some', 'directions', 'for', 'the', 'case', 'that', 'the', 'convex', 'hull', 'is', 'of', 'size', 'bigger', 'than', '3']] | [-0.12544839440242334, 0.08211215606989915, -0.011371584718718249, -0.01669520355267998, -0.007840978923965902, -0.09589338638984105, 0.03461209752405172, 0.3408465443726848, -0.28328310678000834, -0.24409867663155585, 0.12276395937729188, -0.3048695569529253, -0.1135344051372479, 0.2019310835201074, -0.06722387989215992, 0.0031615125234512723, 0.03823434029541471, 0.047189231216907504, -0.0649693005334805, -0.2728809298495488, 0.38518417795626997, -0.0331366908900878, 0.1939094592433642, 0.04593824106542503, 0.07577948347418843, 0.017645312023951726, 0.028021113514242805, 0.09121422487146714, -0.11046095259628012, 0.1498031922876287, 0.21304659604587975, 0.21452392385724714, 0.2618012712501428, -0.39989314033266377, -0.11443604130626601, 0.16938861626036028, 0.1002489253111622, 0.07865272834897041, -0.014159617112839923, -0.20820680288324023, 0.14369865208864213, -0.06915063176523237, -0.1507385386756676, 0.031099900175981663, 0.06913516068940653, 0.03427285031579873, -0.3053027456078459, -0.026686132819775273, 0.09242685019613846, 0.06891321365940659, -0.07033898468841525, -0.1264821314417264, -0.01077199836864191, 0.0960306826431085, 0.029337486320668283, 0.07545326169689788, 0.06886035551262253, -0.1067903359338422, -0.12569709404864732, 0.4002637402537991, 0.03601601915074485, -0.243944234883084, 0.16864266918205162, -0.14938446784063297, -0.08732741970897598, 0.15593704212018672, 0.17933611612054792, 0.1686498274040573, -0.08377324829206748, 0.1292844631969381, -0.10275072994477609, 0.128860339927761, 0.059757635211024215, -0.005179074773674502, 0.12732899791068014, 0.13786204119815545, 0.15902075789978398, 0.19705425733905835, -0.13064948734553422, -0.0799848487271982, -0.3512254603207111, -0.18081094064914127, -0.22750594242311575, -0.016115769415217286, -0.13259030867450158, -0.18191059843143997, 0.41526770442724226, 0.1071092165677863, 0.2723682490341804, 0.07807289467138402, 0.2901126217973583, 0.10691765038406148, 0.015146227034411448, 0.125221985474448, 0.17409816903288147, 0.055163216621012374, 0.0005562938859357553, -0.2189273976830437, 0.056023364284021014, 0.08403989217956276] |
709.2556 | SDLS: a Matlab package for solving conic least-squares problems | This document is an introduction to the Matlab package SDLS (Semi-Definite
Least-Squares) for solving least-squares problems over convex symmetric cones.
The package is shortly presented through the addressed problem, a sketch of the
implemented algorithm, the syntax and calling sequences, a simple numerical
example and some more advanced features. The implemented method consists in
solving the dual problem with a quasi-Newton algorithm. We note that SDLS is
not the most competitive implementation of this algorithm: efficient, robust,
commercial implementations are available (contact the authors). Our main goal
with this Matlab SDLS package is to provide a simple, user-friendly software
for solving and experimenting with semidefinite least-squares problems. Up to
our knowledge, no such freeware exists at this date.
| math.OC | this document is an introduction to the matlab package sdls semidefinite leastsquares for solving leastsquares problems over convex symmetric cones the package is shortly presented through the addressed problem a sketch of the implemented algorithm the syntax and calling sequences a simple numerical example and some more advanced features the implemented method consists in solving the dual problem with a quasinewton algorithm we note that sdls is not the most competitive implementation of this algorithm efficient robust commercial implementations are available contact the authors our main goal with this matlab sdls package is to provide a simple userfriendly software for solving and experimenting with semidefinite leastsquares problems up to our knowledge no such freeware exists at this date | [['this', 'document', 'is', 'an', 'introduction', 'to', 'the', 'matlab', 'package', 'sdls', 'semidefinite', 'leastsquares', 'for', 'solving', 'leastsquares', 'problems', 'over', 'convex', 'symmetric', 'cones', 'the', 'package', 'is', 'shortly', 'presented', 'through', 'the', 'addressed', 'problem', 'a', 'sketch', 'of', 'the', 'implemented', 'algorithm', 'the', 'syntax', 'and', 'calling', 'sequences', 'a', 'simple', 'numerical', 'example', 'and', 'some', 'more', 'advanced', 'features', 'the', 'implemented', 'method', 'consists', 'in', 'solving', 'the', 'dual', 'problem', 'with', 'a', 'quasinewton', 'algorithm', 'we', 'note', 'that', 'sdls', 'is', 'not', 'the', 'most', 'competitive', 'implementation', 'of', 'this', 'algorithm', 'efficient', 'robust', 'commercial', 'implementations', 'are', 'available', 'contact', 'the', 'authors', 'our', 'main', 'goal', 'with', 'this', 'matlab', 'sdls', 'package', 'is', 'to', 'provide', 'a', 'simple', 'userfriendly', 'software', 'for', 'solving', 'and', 'experimenting', 'with', 'semidefinite', 'leastsquares', 'problems', 'up', 'to', 'our', 'knowledge', 'no', 'such', 'freeware', 'exists', 'at', 'this', 'date']] | [-0.06605428325750282, -0.07170688116642296, -0.07824868459049296, 0.052475796941415236, -0.1575727236567665, -0.23261662874512878, -0.036208221156118534, 0.42983213411959803, -0.3000900778353167, -0.29075145664017144, 0.16106984779234754, -0.2440187171519876, -0.18205596019229772, 0.25414663872886767, -0.06771816795897055, 0.09842813656353629, 0.15636837911807885, -0.043668869288659935, -0.10993461629377789, -0.2970579340077258, 0.228199268261097, 0.08163471080528541, 0.18910176798669717, 0.06521428195696513, 0.11759016804112973, -0.011103844678550327, -0.04900502285257108, 0.01075857215865823, -0.09310435482639458, 0.14501445180681236, 0.3489786504010149, 0.24625202506717483, 0.3448380908644679, -0.37755855116046083, -0.11317240975607755, 0.05750678336421438, 0.12135433374363455, 0.12112949688729467, -0.1082510180891959, -0.26013525473782634, 0.08678555362305398, -0.15996461685241783, -0.10188932837010756, -0.08773024066872263, -0.04332646005392327, -0.029812486700208512, -0.28864564130603637, -0.017760361505325062, 0.020921538277110876, 0.07944625352461965, -0.0146772843754507, -0.17921910298419957, 0.07976359528103046, 0.03765672970547388, -0.016802429205785365, 0.06774806175223094, 0.07601175707433436, -0.014269049433296767, -0.13275261616760517, 0.3643000037488291, -0.008316539180607109, -0.2321313688910361, 0.16573794530231065, 0.03519307681501417, -0.157647338413665, 0.12317861270917169, 0.1816705597872388, 0.18944581293390464, -0.1981275464581736, 0.10737040884465633, -0.05601862785643188, 0.17534238173946012, 0.007749515068638376, -0.09364374399962598, 0.13663783719984152, 0.2115420744738589, 0.07400511609295667, 0.15415825456443985, 0.02467343514248476, -0.09183733976619729, -0.29232252795265007, -0.14767285718945627, -0.20473655661315485, -0.058718437457065516, -0.07976235131601413, -0.20190380763862345, 0.41783951990053814, 0.17845017045649494, 0.0796713997842744, 0.10187888665566758, 0.4078897677817761, 0.09248101215422848, 0.05468567571123289, 0.1648941043038237, 0.13313039819738567, 0.0907460464701309, 0.12408899615214886, -0.20448261586223113, 0.06063912214585027, 0.09012236813146432] |
709.2557 | Non-relativistic limit in the 2+1 Dirac Oscillator: A Ramsey
Interferometry Effect | We study the non-relativistic limit of a paradigmatic model in Relativistic
Quantum Mechanics, the two-dimensional Dirac oscillator. Remarkably, we find a
novel kind of Zitterbewegung which persists in this non-relativistic regime,
and leads to an observable deformation of the particle orbit. This effect can
be interpreted in terms of a Ramsey Interferometric phenomenon, allowing an
insightful connection between Relativistic Quantum Mechanics and Quantum
Optics. Furthermore, subsequent corrections to the non-relativistic limit,
which account for the usual spin-orbit Zitterbewegung, can be neatly understood
in terms of a Mach-Zehnder interferometer.
| quant-ph cond-mat.other hep-th | we study the nonrelativistic limit of a paradigmatic model in relativistic quantum mechanics the twodimensional dirac oscillator remarkably we find a novel kind of zitterbewegung which persists in this nonrelativistic regime and leads to an observable deformation of the particle orbit this effect can be interpreted in terms of a ramsey interferometric phenomenon allowing an insightful connection between relativistic quantum mechanics and quantum optics furthermore subsequent corrections to the nonrelativistic limit which account for the usual spinorbit zitterbewegung can be neatly understood in terms of a machzehnder interferometer | [['we', 'study', 'the', 'nonrelativistic', 'limit', 'of', 'a', 'paradigmatic', 'model', 'in', 'relativistic', 'quantum', 'mechanics', 'the', 'twodimensional', 'dirac', 'oscillator', 'remarkably', 'we', 'find', 'a', 'novel', 'kind', 'of', 'zitterbewegung', 'which', 'persists', 'in', 'this', 'nonrelativistic', 'regime', 'and', 'leads', 'to', 'an', 'observable', 'deformation', 'of', 'the', 'particle', 'orbit', 'this', 'effect', 'can', 'be', 'interpreted', 'in', 'terms', 'of', 'a', 'ramsey', 'interferometric', 'phenomenon', 'allowing', 'an', 'insightful', 'connection', 'between', 'relativistic', 'quantum', 'mechanics', 'and', 'quantum', 'optics', 'furthermore', 'subsequent', 'corrections', 'to', 'the', 'nonrelativistic', 'limit', 'which', 'account', 'for', 'the', 'usual', 'spinorbit', 'zitterbewegung', 'can', 'be', 'neatly', 'understood', 'in', 'terms', 'of', 'a', 'machzehnder', 'interferometer']] | [-0.1600755050736056, 0.1985950571916791, -0.15244593582412397, 0.09433951513809999, -0.04272489780718884, -0.16205546490594067, 0.000807488134755245, 0.31193338994952763, -0.2543927638537504, -0.2719401958694851, -0.05358612764393911, -0.20186761583053422, -0.17597908624024552, 0.1980446240532646, -0.06525139943484894, 0.04015396607494701, 0.06591318539259108, 0.01734804683788256, -0.099653557556766, -0.1391139130785384, 0.25765188121956517, 0.089601673508944, 0.2287278279439885, 0.04187342985956506, 0.08488806537140837, 0.021888190949208696, 0.07638410446022383, 0.060799784582658584, -0.10792160643243486, 0.041341626123705115, 0.23306990883694115, -0.02427949579644271, 0.22212758416373451, -0.45455256674904376, -0.22821426000022751, 0.057409860939845785, 0.18049848987191747, 0.21819531145526774, 0.0014856438766318288, -0.36850402055477555, -0.08698393374453933, -0.24468683976341377, -0.18228002128572288, -0.0805985847255215, 0.011518964464564553, -0.08176031238029034, -0.20809827531179922, 0.1009985799477859, 0.09477230068296194, 0.006200768921354955, 0.007957584039435129, -0.014940979446030477, 0.05407478893175721, 0.0703933528275229, 0.0021441763317191294, 0.001851299928437749, 0.0935249351287811, -0.13608640725512736, -0.18575004077601162, 0.49421399571424857, -0.08621392662065443, -0.19019639674115751, 0.1267810934540731, -0.19402371198785576, -0.10710751652632924, 0.07930464299649677, 0.14092297773723575, 0.09428464431601408, -0.15419772697019984, 0.1114466603334718, -0.04206106654072011, 0.11127212568482553, 0.06678285836030474, 0.1272673261542381, 0.28663646785373037, 0.12653128234457903, 0.0018900512527166443, 0.15575530239386187, -0.09549327465620908, -0.1742720989833205, -0.3565973965027793, -0.19254635996185243, -0.1830318207079968, 0.12960170076059346, -0.0760643695615396, -0.17154452377739784, 0.3652690663743256, 0.15622191680383615, 0.14325503216506066, -0.03694135702310384, 0.2668977708301761, 0.20964931131509895, 0.007981968228705227, -0.018609773584599185, 0.3363468305694617, 0.20317239843478258, 0.09607959725491871, -0.2786803583148867, -0.05201956411209804, 0.06589541518637403] |
709.2558 | Modified Averaging Processes in Cosmology and the Structured FRW model | We study the volume averaging of inhomogeneous metrics within GR and discuss
its shortcomings such as gauge dependence, singular behavior as a result of
caustics, and causality violations. To remedy these shortcomings, we suggest
some modifications to this method. As a case study we focus on the
inhomogeneous structured FRW model based on a flat LTB metric. The effect of
averaging is then studied in terms of an effective backreaction fluid. It is
shown that, contrary to the claims in the literature, the backreaction fluid
behaves like a dark matter component, instead of dark energy, having a density
of the order of 10^{-5} times the matter density, and most importantly, it is
gauge dependent.
| astro-ph | we study the volume averaging of inhomogeneous metrics within gr and discuss its shortcomings such as gauge dependence singular behavior as a result of caustics and causality violations to remedy these shortcomings we suggest some modifications to this method as a case study we focus on the inhomogeneous structured frw model based on a flat ltb metric the effect of averaging is then studied in terms of an effective backreaction fluid it is shown that contrary to the claims in the literature the backreaction fluid behaves like a dark matter component instead of dark energy having a density of the order of 105 times the matter density and most importantly it is gauge dependent | [['we', 'study', 'the', 'volume', 'averaging', 'of', 'inhomogeneous', 'metrics', 'within', 'gr', 'and', 'discuss', 'its', 'shortcomings', 'such', 'as', 'gauge', 'dependence', 'singular', 'behavior', 'as', 'a', 'result', 'of', 'caustics', 'and', 'causality', 'violations', 'to', 'remedy', 'these', 'shortcomings', 'we', 'suggest', 'some', 'modifications', 'to', 'this', 'method', 'as', 'a', 'case', 'study', 'we', 'focus', 'on', 'the', 'inhomogeneous', 'structured', 'frw', 'model', 'based', 'on', 'a', 'flat', 'ltb', 'metric', 'the', 'effect', 'of', 'averaging', 'is', 'then', 'studied', 'in', 'terms', 'of', 'an', 'effective', 'backreaction', 'fluid', 'it', 'is', 'shown', 'that', 'contrary', 'to', 'the', 'claims', 'in', 'the', 'literature', 'the', 'backreaction', 'fluid', 'behaves', 'like', 'a', 'dark', 'matter', 'component', 'instead', 'of', 'dark', 'energy', 'having', 'a', 'density', 'of', 'the', 'order', 'of', '105', 'times', 'the', 'matter', 'density', 'and', 'most', 'importantly', 'it', 'is', 'gauge', 'dependent']] | [-0.12286013222540516, 0.09758741895603364, -0.1400953076673639, 0.12139303163878554, -0.10253796576146494, -0.07674026326684837, -0.02262611590783324, 0.33602095391241865, -0.19657384382924392, -0.2918822783680649, 0.08967502455414976, -0.2798761997388251, -0.13977094559946604, 0.10773735279176515, -0.04818723115686066, 0.02408234028833951, -0.027434768126623935, 0.046617053048848583, -0.09400680829288863, -0.2542409496361455, 0.35404156807712034, 0.06952308003970406, 0.29161737715670216, 0.06607115640419356, 0.10416501321372364, -0.02137748793118813, -0.04273116778941792, 0.08719904302505024, -0.14480849115512173, 0.05011923401208039, 0.17759068561881258, 0.07986730406583663, 0.253310829454118, -0.40924412330710574, -0.28434064240080487, 0.12245105793944706, 0.1331124927081666, 0.14929558477250107, -0.04468858342928191, -0.27356438737019506, 0.05375094391459705, -0.19515125134044833, -0.15252181917547428, -0.049758581689705976, 0.02294116284240756, -0.015899732265735798, -0.21129593527630755, 0.13425658958460604, 0.04842642559914997, -0.02355749431278622, -0.061674343617101966, -0.07855690352765746, 0.008992581791652922, 0.010078181009719214, 0.14297070654962832, 0.010386938351745667, 0.1807134226536411, -0.1653279060443757, -0.05327403617271206, 0.44051015726086407, -0.13413507403528088, -0.22064959956537278, 0.15041386650001073, -0.09690265968164201, -0.12553938337716095, 0.058876513732237776, 0.14678507837417878, 0.13297540994499923, -0.1217995388760117, 0.12708039180908695, -0.028339206471859495, 0.1399463546347984, 0.08011169565980437, 0.04929368543079156, 0.22251109005229777, 0.1618301585529065, 0.06329664950291708, 0.09261075119036577, -0.0510333594866097, -0.11208562630130664, -0.359929024691187, -0.14841452557716125, -0.15982054056382222, 0.07082730228604193, -0.11279159560026049, -0.20810599541449878, 0.3699356357428131, 0.17657945546926113, 0.20783893982961513, 0.01986825157349047, 0.29374321679208887, 0.0845500325034536, 0.026093044154868836, 0.07760770326447591, 0.25808543100541564, 0.14440743262438396, 0.08384188023608244, -0.22447302186730922, 0.009467127336711999, 0.020461103836025455] |
709.2559 | GloptiPoly 3: moments, optimization and semidefinite programming | We describe a major update of our Matlab freeware GloptiPoly for parsing
generalized problems of moments and solving them numerically with semidefinite
programming.
| math.OC | we describe a major update of our matlab freeware gloptipoly for parsing generalized problems of moments and solving them numerically with semidefinite programming | [['we', 'describe', 'a', 'major', 'update', 'of', 'our', 'matlab', 'freeware', 'gloptipoly', 'for', 'parsing', 'generalized', 'problems', 'of', 'moments', 'and', 'solving', 'them', 'numerically', 'with', 'semidefinite', 'programming']] | [-0.047609401299901634, -0.10702716109707304, -0.031744538279979126, 0.0801479434594512, -0.15653505945659202, -0.22890902988855605, -0.003255075734594594, 0.3776140156728418, -0.36009512226218765, -0.3368571855370765, 0.1503343624872682, -0.2580064340373096, -0.15597152807142423, 0.20897244888803232, 0.012408251955133417, 0.16488949671063735, 0.14159108948407936, -0.09798685210230558, -0.16440749678598798, -0.29535138728502003, 0.23372381686678398, 0.013526726650762494, 0.13138249257336493, 0.08281841886270305, 0.1967341204214355, 0.007054257004157356, -0.026097246486207714, 0.04470600058203158, -0.1012803626894627, 0.1522907582314118, 0.4082462008556594, 0.2740318405887355, 0.28567554040447524, -0.42297061986249423, -0.05401728836738545, -0.00910874358985735, 0.12300578197059424, 0.1308444953098407, -0.0747735919430852, -0.32222179076431884, 0.07020477468714766, -0.14234823725469734, -0.0521999882210208, -0.16755675941543735, 0.0059182628503312235, 0.02448055431570696, -0.30344753631431126, -0.008796018102894659, 0.02830027481136115, 0.05364885663046785, -0.054760481575099024, -0.26119924352868745, 0.1024831125067304, 0.0483669723060144, -0.012726086232325306, 0.010543244526438091, 0.04951412389662279, -0.016731996628273602, -0.23339228992066954, 0.3577196267635926, 0.0015860952274954836, -0.2586676975631196, 0.12704858625226695, 0.031372104811927544, -0.20623545457973427, 0.012643845711389313, 0.30048554803690186, 0.20680154303250753, -0.17886955797186363, 0.0972734545939602, -0.05647298588376978, 0.1559137184496807, 0.08339845477198453, -0.17819004586857298, 0.14870873362878742, 0.178001394495368, 0.028013083516903545, 0.18184896700246178, 0.04200882404794633, -0.13377085753271115, -0.2585434847227905, -0.17951526245831148, -0.18295394348830957, -0.07400238019940646, -0.1344947873851355, -0.2058774178199794, 0.4433036725158277, 0.1814814290517698, 0.016380117477282234, 0.21428693203336519, 0.34987557043685863, 0.15531767012409703, 0.06285304821136853, 0.18740242465561174, 0.09161776085586651, 0.1369846561194762, 0.14560279820073882, -0.2781759976692822, 0.0655867590609452, 0.11443716737077288] |
709.256 | Nature of the spin dynamics and 1/3 magnetization plateau in azurite | We present a specific heat and inelastic neutron scattering study in magnetic
fields up into the 1/3 magnetization plateau phase of the diamond chain
compound azurite Cu$_3$(CO$_3$)$_2$(OH)$_2$. We establish that the
magnetization plateau is a dimer-monomer state, {\it i.e.}, consisting of a
chain of $S = 1/2$ monomers, which are separated by $S = 0$ dimers on the
diamond chain backbone. The effective spin couplings $J_{mono}/k_B = 10.1(2)$ K
and $J_{dimer}/k_B = 1.8(1)$ K are derived from the monomer and dimer
dispersions. They are associated to microscopic couplings $J_1/k_B = 1(2)$ K,
$J_2/k_B = 55(5)$ K and a ferromagnetic $J_3/k_B = -20(5)$ K, possibly as
result of $d_{z^2}$ orbitals in the Cu-O bonds providing the superexchange
pathways.
| cond-mat.stat-mech | we present a specific heat and inelastic neutron scattering study in magnetic fields up into the 13 magnetization plateau phase of the diamond chain compound azurite cu_3co_3_2oh_2 we establish that the magnetization plateau is a dimermonomer state it ie consisting of a chain of s 12 monomers which are separated by s 0 dimers on the diamond chain backbone the effective spin couplings j_monok_b 1012 k and j_dimerk_b 181 k are derived from the monomer and dimer dispersions they are associated to microscopic couplings j_1k_b 12 k j_2k_b 555 k and a ferromagnetic j_3k_b 205 k possibly as result of d_z2 orbitals in the cuo bonds providing the superexchange pathways | [['we', 'present', 'a', 'specific', 'heat', 'and', 'inelastic', 'neutron', 'scattering', 'study', 'in', 'magnetic', 'fields', 'up', 'into', 'the', '13', 'magnetization', 'plateau', 'phase', 'of', 'the', 'diamond', 'chain', 'compound', 'azurite', 'cu_3co_3_2oh_2', 'we', 'establish', 'that', 'the', 'magnetization', 'plateau', 'is', 'a', 'dimermonomer', 'state', 'it', 'ie', 'consisting', 'of', 'a', 'chain', 'of', 's', '12', 'monomers', 'which', 'are', 'separated', 'by', 's', '0', 'dimers', 'on', 'the', 'diamond', 'chain', 'backbone', 'the', 'effective', 'spin', 'couplings', 'j_monok_b', '1012', 'k', 'and', 'j_dimerk_b', '181', 'k', 'are', 'derived', 'from', 'the', 'monomer', 'and', 'dimer', 'dispersions', 'they', 'are', 'associated', 'to', 'microscopic', 'couplings', 'j_1k_b', '12', 'k', 'j_2k_b', '555', 'k', 'and', 'a', 'ferromagnetic', 'j_3k_b', '205', 'k', 'possibly', 'as', 'result', 'of', 'd_z2', 'orbitals', 'in', 'the', 'cuo', 'bonds', 'providing', 'the', 'superexchange', 'pathways']] | [-0.20993970404818374, 0.25323071989740403, 0.015220348178496901, 0.015046968211569244, -0.009169245428704429, -0.1799924189470849, 0.12114417684519277, 0.40485374738444696, -0.2588519114091606, -0.2881089822160748, 0.008128373490488332, -0.3709093158326621, -0.005295188280419921, 0.1084594961282147, 0.1558819690945488, -0.06949240834241346, 0.004013878506397442, 0.02215478224855549, -0.04470885806730158, -0.20471351912447233, 0.21113043128214073, -0.02000307897545116, 0.2204548306323869, 0.057483229173329785, 0.06006137090120113, 0.017006432879188994, 0.1553750430840015, -0.04320051069459263, -0.20966918821226121, 0.09397492727335051, 0.2683899621127771, -0.09787372895516455, 0.12411949187209655, -0.3979621676657841, -0.15923702473453474, 0.03475257333473496, 0.1275822229393459, 0.11778025869785298, 0.02930864934559103, -0.2656129511284097, 0.04024138022214174, -0.13195721416312428, -0.10340466848047415, -0.06042607484894963, 0.009027553427929305, 0.010869047602304732, -0.25159464167641865, 0.12609849153783936, 0.10530767637691549, 0.1129886208646843, -0.08580231398590049, -0.2143374768542653, -0.10383279690132388, 0.024197778339445027, 0.020543553337085782, 0.09764604078702417, 0.17354316345222717, -0.0694786693817356, -0.1106317175842189, 0.33130101905696374, -0.06352707907944075, -0.038558711007870033, 0.15210975382261788, -0.14977630365306055, -0.09527649439460563, 0.21594646576581136, 0.05126103450421174, 0.1270600712115718, -0.1821594658738248, 0.0875938168379812, -0.004268923835864045, 0.16711359813739107, 0.0586581980053968, 0.01145180007157285, 0.23396733151045893, 0.16370105010211328, 0.03863961170954665, 0.16489499630318638, -0.16635771103495434, -0.10356181100854334, -0.23272547104729796, -0.1826792807309484, -0.2056609587260645, 0.12592423442786313, -0.11395210243776915, -0.13930114012053413, 0.3226083596500586, 0.048433211568811564, 0.21924961932038642, -0.027736884447908523, 0.12962914098335324, 0.04194214667538444, 0.06250175131036777, 0.043972892010197884, 0.1716530324214683, 0.2559705601306632, 0.08979099113406297, -0.2767215843404696, 0.04560243062464134, 0.008630452906045149] |
709.2561 | Rings and shells of "dark matter" as MOND artifacts | MOND predicts that a mass, M, contained within its transition radius
r_t=(MG/a0)^{1/2}, may exhibit a feature at about that radius in the form of a
shell, or projected ring, in the deduced distribution of its phantom dark
matter. This occurs despite the absence of any underlying feature in the true
(``baryon'') source distribution itself. The phenomenon is similar to the
appearance of an event horizon and other unusual physics ``in the middle of
nothing'' near the transition radius of General Relativity $MG/c^2$. We
consider the possibility that this pure MOND phenomenon is in the basis of the
recent finding of such a ring in the galaxy cluster Cl 0024+17 by Jee et al. We
find that the parameters of the observed ring can be naturally explained in
this way; this feature may therefore turn out to be a direct evidence for MOND.
We study this phenomenon in simple, axisymmetric configurations aligned with
the line of sight: spherical masses, a dumbbell of spherical masses, and an
elongated, thin structure. The properties of the apparent ring: its radius,
surface density, and contrast, depend on the form of the MOND interpolating
function and on the exact three dimensional distribution of the sources (the
thin-lens approximation is quite invalid in MOND). We also comment on the
possible appearance of orphan features, marking the Newtonian-to-MOND
transition, in high surface brightness galaxies. In particular, we find that
previously unexplained structure in the rotation curves of some galaxies may be
evidence for such features.
| astro-ph | mond predicts that a mass m contained within its transition radius r_tmga012 may exhibit a feature at about that radius in the form of a shell or projected ring in the deduced distribution of its phantom dark matter this occurs despite the absence of any underlying feature in the true baryon source distribution itself the phenomenon is similar to the appearance of an event horizon and other unusual physics in the middle of nothing near the transition radius of general relativity mgc2 we consider the possibility that this pure mond phenomenon is in the basis of the recent finding of such a ring in the galaxy cluster cl 002417 by jee et al we find that the parameters of the observed ring can be naturally explained in this way this feature may therefore turn out to be a direct evidence for mond we study this phenomenon in simple axisymmetric configurations aligned with the line of sight spherical masses a dumbbell of spherical masses and an elongated thin structure the properties of the apparent ring its radius surface density and contrast depend on the form of the mond interpolating function and on the exact three dimensional distribution of the sources the thinlens approximation is quite invalid in mond we also comment on the possible appearance of orphan features marking the newtoniantomond transition in high surface brightness galaxies in particular we find that previously unexplained structure in the rotation curves of some galaxies may be evidence for such features | [['mond', 'predicts', 'that', 'a', 'mass', 'm', 'contained', 'within', 'its', 'transition', 'radius', 'r_tmga012', 'may', 'exhibit', 'a', 'feature', 'at', 'about', 'that', 'radius', 'in', 'the', 'form', 'of', 'a', 'shell', 'or', 'projected', 'ring', 'in', 'the', 'deduced', 'distribution', 'of', 'its', 'phantom', 'dark', 'matter', 'this', 'occurs', 'despite', 'the', 'absence', 'of', 'any', 'underlying', 'feature', 'in', 'the', 'true', 'baryon', 'source', 'distribution', 'itself', 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709.2562 | When are recommender systems useful? | Recommender systems are crucial tools to overcome the information overload
brought about by the Internet. Rigorous tests are needed to establish to what
extent sophisticated methods can improve the quality of the predictions. Here
we analyse a refined correlation-based collaborative filtering algorithm and
compare it with a novel spectral method for recommending. We test them on two
databases that bear different statistical properties (MovieLens and Jester)
without filtering out the less active users and ordering the opinions in time,
whenever possible. We find that, when the distribution of user-user
correlations is narrow, simple averages work nearly as well as advanced
methods. Recommender systems can, on the other hand, exploit a great deal of
additional information in systems where external influence is negligible and
peoples' tastes emerge entirely. These findings are validated by simulations
with artificially generated data.
| cs.IR cs.CY cs.DL cs.DS physics.data-an physics.soc-ph | recommender systems are crucial tools to overcome the information overload brought about by the internet rigorous tests are needed to establish to what extent sophisticated methods can improve the quality of the predictions here we analyse a refined correlationbased collaborative filtering algorithm and compare it with a novel spectral method for recommending we test them on two databases that bear different statistical properties movielens and jester without filtering out the less active users and ordering the opinions in time whenever possible we find that when the distribution of useruser correlations is narrow simple averages work nearly as well as advanced methods recommender systems can on the other hand exploit a great deal of additional information in systems where external influence is negligible and peoples tastes emerge entirely these findings are validated by simulations with artificially generated data | [['recommender', 'systems', 'are', 'crucial', 'tools', 'to', 'overcome', 'the', 'information', 'overload', 'brought', 'about', 'by', 'the', 'internet', 'rigorous', 'tests', 'are', 'needed', 'to', 'establish', 'to', 'what', 'extent', 'sophisticated', 'methods', 'can', 'improve', 'the', 'quality', 'of', 'the', 'predictions', 'here', 'we', 'analyse', 'a', 'refined', 'correlationbased', 'collaborative', 'filtering', 'algorithm', 'and', 'compare', 'it', 'with', 'a', 'novel', 'spectral', 'method', 'for', 'recommending', 'we', 'test', 'them', 'on', 'two', 'databases', 'that', 'bear', 'different', 'statistical', 'properties', 'movielens', 'and', 'jester', 'without', 'filtering', 'out', 'the', 'less', 'active', 'users', 'and', 'ordering', 'the', 'opinions', 'in', 'time', 'whenever', 'possible', 'we', 'find', 'that', 'when', 'the', 'distribution', 'of', 'useruser', 'correlations', 'is', 'narrow', 'simple', 'averages', 'work', 'nearly', 'as', 'well', 'as', 'advanced', 'methods', 'recommender', 'systems', 'can', 'on', 'the', 'other', 'hand', 'exploit', 'a', 'great', 'deal', 'of', 'additional', 'information', 'in', 'systems', 'where', 'external', 'influence', 'is', 'negligible', 'and', 'peoples', 'tastes', 'emerge', 'entirely', 'these', 'findings', 'are', 'validated', 'by', 'simulations', 'with', 'artificially', 'generated', 'data']] | [-0.07801310880361192, 0.05922895226029366, -0.08405898216165208, 0.12319412042070724, -0.12129330080016142, -0.17711606294419752, 0.06786605890799505, 0.43446073830331655, -0.2575807541640251, -0.35730055888883605, 0.10510974910779836, -0.3387745251355652, -0.17674058113913357, 0.19916387234073485, -0.07136636633208415, 0.06704348959300639, 0.09713198390813123, 0.03892411878264516, -0.0699038729551724, -0.2807953965724412, 0.3202178409921318, 0.06567415946807345, 0.3230581187819858, 0.03467605688208102, 0.04851038452581142, 0.0019156888618480658, -0.10263012839739558, 0.037839957142425495, -0.10540992185455597, 0.12611642735840303, 0.27583156468985726, 0.1659656191639004, 0.3378222640467821, -0.43088387708811865, -0.22225403685095538, 0.07233564253135101, 0.16278382602494454, 0.09563490060450387, -0.05178546272116258, -0.3324214499103871, 0.10323229032130164, -0.16901812828859708, -0.0770027096838738, -0.15057313777285417, -0.03960545087763428, 0.054136239434507454, -0.26077489405708987, 0.03704060601872684, 0.042122376019672156, 0.0796246712782631, -0.01337326184530355, -0.11163926656174399, 0.005688652001919537, 0.1899700090631139, 0.06402428869334777, -0.0396799514678572, 0.1480157813499172, -0.12785197854640648, -0.1563086862043634, 0.3778218439759782, -0.02069074350764404, -0.19648279468223018, 0.21434655251069823, -0.08023269550346286, -0.14425677655563846, 0.0844394253043417, 0.21353663449739888, 0.07406932731791244, -0.1774483867271941, -0.010771188978445681, -0.02556643541307481, 0.20016065700469118, 0.02133888884168798, 0.04212205059296132, 0.1962634577317313, 0.17245396225794768, 0.04152638345521732, 0.07736809143879839, -0.037195128356624925, -0.10593395252638993, -0.1741836346536331, -0.11215915790602674, -0.17520582346402, 0.010408004052447576, -0.0951008182167701, -0.11962541284882565, 0.3449522707522949, 0.2601268045420684, 0.17165973799874204, 0.014109107898548245, 0.34319695179099147, 0.05596119232550535, 0.08035594358849917, 0.06077231337964479, 0.20451488480631289, 0.04280712590450897, 0.13388814888962539, -0.16693769641438105, 0.10105279267826764, -0.014833590190816861] |
709.2563 | Nulling interferometry: performance comparison between Antarctica and
other ground-based sites | Detecting the presence of circumstellar dust around nearby solar-type main
sequence stars is an important pre-requisite for the design of future
life-finding space missions such as ESA's Darwin or NASA's Terrestrial Planet
Finder (TPF). The high Antarctic plateau may provide appropriate conditions to
perform such a survey from the ground. We investigate the performance of a
nulling interferometer optimised for the detection of exozodiacal discs at Dome
C, on the high Antarctic plateau, and compare it to the expected performance of
similar instruments at temperate sites. Based on the currently available
measurements of the turbulence characteristics at Dome C, we adapt the GENIEsim
software (Absil et al. 2006, A&A 448) to simulate the performance of a nulling
interferometer on the high Antarctic plateau. To feed a realistic instrumental
configuration into the simulator, we propose a conceptual design for ALADDIN,
the Antarctic L-band Astrophysics Discovery Demonstrator for Interferometric
Nulling. We assume that this instrument can be placed above the 30-m high
boundary layer, where most of the atmospheric turbulence originates. We show
that an optimised nulling interferometer operating on a pair of 1-m class
telescopes located 30 m above the ground could achieve a better sensitivity
than a similar instrument working with two 8-m class telescopes at a temperate
site such as Cerro Paranal. The detection of circumstellar discs about 20 times
as dense as our local zodiacal cloud seems within reach for typical Darwin/TPF
targets in a integration time of a few hours. Moreover, the exceptional
turbulence conditions significantly relax the requirements on real-time control
loops, which has favourable consequences on the feasibility of the nulling
instrument.
| astro-ph | detecting the presence of circumstellar dust around nearby solartype main sequence stars is an important prerequisite for the design of future lifefinding space missions such as esas darwin or nasas terrestrial planet finder tpf the high antarctic plateau may provide appropriate conditions to perform such a survey from the ground we investigate the performance of a nulling interferometer optimised for the detection of exozodiacal discs at dome c on the high antarctic plateau and compare it to the expected performance of similar instruments at temperate sites based on the currently available measurements of the turbulence characteristics at dome c we adapt the geniesim software absil et al 2006 aa 448 to simulate the performance of a nulling interferometer on the high antarctic plateau to feed a realistic instrumental configuration into the simulator we propose a conceptual design for aladdin the antarctic lband astrophysics discovery demonstrator for interferometric nulling we assume that this instrument can be placed above the 30m high boundary layer where most of the atmospheric turbulence originates we show that an optimised nulling interferometer operating on a pair of 1m class telescopes located 30 m above the ground could achieve a better sensitivity than a similar instrument working with two 8m class telescopes at a temperate site such as cerro paranal the detection of circumstellar discs about 20 times as dense as our local zodiacal cloud seems within reach for typical darwintpf targets in a integration time of a few hours moreover the exceptional turbulence conditions significantly relax the requirements on realtime control loops which has favourable consequences on the feasibility of the nulling instrument | [['detecting', 'the', 'presence', 'of', 'circumstellar', 'dust', 'around', 'nearby', 'solartype', 'main', 'sequence', 'stars', 'is', 'an', 'important', 'prerequisite', 'for', 'the', 'design', 'of', 'future', 'lifefinding', 'space', 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709.2564 | Finite rank approximations of expanding maps with neutral singularities | For a class of expanding maps with neutral singularities we prove the
validity of a finite rank approximation scheme for the analysis of
Sinai-Ruelle-Bowen measures. Earlier results of this sort were known only in
the case of hyperbolic systems.
| math.DS math-ph math.MP | for a class of expanding maps with neutral singularities we prove the validity of a finite rank approximation scheme for the analysis of sinairuellebowen measures earlier results of this sort were known only in the case of hyperbolic systems | [['for', 'a', 'class', 'of', 'expanding', 'maps', 'with', 'neutral', 'singularities', 'we', 'prove', 'the', 'validity', 'of', 'a', 'finite', 'rank', 'approximation', 'scheme', 'for', 'the', 'analysis', 'of', 'sinairuellebowen', 'measures', 'earlier', 'results', 'of', 'this', 'sort', 'were', 'known', 'only', 'in', 'the', 'case', 'of', 'hyperbolic', 'systems']] | [-0.14589854389823115, 0.05414725934417966, -0.09476630642819099, 0.08616439690992522, 0.009524372967485433, -0.10762710351114854, 0.058205669650282614, 0.32259699298689765, -0.19337075473501897, -0.2023356713068027, 0.11939739824260752, -0.2733368531633646, -0.13114031346944663, 0.21204403737703195, -0.042526042399307094, 0.0789460775275261, 0.044830932114750914, 0.0487665042328911, -0.10821945771861535, -0.2712247007114526, 0.3905729287518905, -0.009080281528906945, 0.24747675814880774, 0.06466296871598715, 0.10602246064883776, -0.020202628874148313, -0.08597190329470696, 0.08212848619008675, -0.13176703032774803, 0.12354817379337664, 0.226504722251915, 0.1125090841191988, 0.2650539248119084, -0.30786213856668043, -0.26148058493167925, 0.14432944835294995, 0.11715228072343728, 0.1232323535312809, -0.05190489386829237, -0.2751382982585197, 0.12072443685088402, -0.16577705672870463, -0.24504845570295286, -0.05903571579032219, 0.0040580833909842065, 0.07526397225088798, -0.2605948799695724, 0.07415992979151316, 0.12960398458660796, 0.08254933744991341, -0.09097252287066136, -0.06965837594217215, 0.036384506652561516, 0.08732753275678708, 0.017602785299412716, -0.028441564335177343, 0.06645822148913375, -0.07512012085256477, -0.11957307441685444, 0.36573094053146166, -0.08182882885329235, -0.23638517037034035, 0.19666498032613441, -0.18933184382816157, -0.19210867149731478, 0.14051104871890482, 0.15240629764799124, 0.17333210158260323, -0.07385985067305274, 0.1407831660591257, -0.10614251180623586, 0.11844454638850994, 0.08127966143477422, 0.013657737427797073, 0.10042076357282124, 0.1140872889246123, 0.0776543793722223, 0.16351466917862686, -0.01854742367345935, -0.09999020306918865, -0.3360958230227996, -0.18951169742892185, -0.13716052608707777, 0.07151853517951587, -0.09357791914580724, -0.21833490260327473, 0.3864897277704492, 0.07709649379532306, 0.17684073392779398, 0.107415035719243, 0.27381485366286373, 0.09765797104382028, 0.022420735217821904, 0.05896205049103651, 0.20073193340347364, 0.1499773500403628, 0.043972922465166986, -0.13964462066546846, 0.026259678618934672, 0.17392022346552366] |
709.2565 | Observation of e+e- to K+K-J/psi via Initial State Radiation at Belle | The process e+e- to K+K-J/psi is observed for the first time via initial
state radiation. The cross section of e+e- to K+K-J/psi for center-of-mass
energies between threshold and 6.0 GeV is measured using 673 fb^{-1} of data
collected with the Belle detector on and off the Upsilon(4S) resonance. We also
find evidence for e+e- to K_S K_S J/psi in the same energy region.
| hep-ex | the process ee to kkjpsi is observed for the first time via initial state radiation the cross section of ee to kkjpsi for centerofmass energies between threshold and 60 gev is measured using 673 fb1 of data collected with the belle detector on and off the upsilon4s resonance we also find evidence for ee to k_s k_s jpsi in the same energy region | [['the', 'process', 'ee', 'to', 'kkjpsi', 'is', 'observed', 'for', 'the', 'first', 'time', 'via', 'initial', 'state', 'radiation', 'the', 'cross', 'section', 'of', 'ee', 'to', 'kkjpsi', 'for', 'centerofmass', 'energies', 'between', 'threshold', 'and', '60', 'gev', 'is', 'measured', 'using', '673', 'fb1', 'of', 'data', 'collected', 'with', 'the', 'belle', 'detector', 'on', 'and', 'off', 'the', 'upsilon4s', 'resonance', 'we', 'also', 'find', 'evidence', 'for', 'ee', 'to', 'k_s', 'k_s', 'jpsi', 'in', 'the', 'same', 'energy', 'region']] | [-0.05128583992047915, 0.12878044829186466, -0.09815532867131489, 0.11924891473300084, -0.028941777993052725, -0.07549554887153799, 0.07294912067877632, 0.3677247366498387, -0.16252650056655207, -0.3150983560416434, -0.06592519888986967, -0.4374842222720858, 0.10614525361193551, 0.1946843605348101, 0.1511223255836826, 0.14018589234541332, 0.17939590928809984, 0.03269901644024584, -0.0015291775805905225, -0.17243207071626943, 0.25077761795430903, 0.13757768648839186, 0.28070658664145165, 0.1586222362128042, 0.07737307762172782, 0.04804681726760926, 0.0026558609753255806, -0.10049832919760356, -0.15176182585058823, 0.0075289030496533665, 0.3095302789154211, 0.13283050772068755, 0.11285033230743712, -0.3335513698735407, 0.018697701069334195, 0.21362478777559268, 0.12712877095928268, 0.012024682576930712, -0.0016122529641651208, -0.39318915738886784, 0.17275442919945197, -0.17465708117991213, -0.0339150151001319, 0.03466684292883627, 0.06969699004871978, -0.10387571002282793, -0.33825749880264677, 0.11241392509980379, -0.09947716002352536, 0.06310485544363184, -0.09617178453989918, -0.21076550766352622, -0.07775395334003464, -0.061669154964860466, 0.03295851078222595, 0.07768233648930041, 0.19769249835036815, -0.10475398728712684, -0.16305914317213355, 0.27785382390258806, -0.048752030771639615, -0.05436139763702476, 0.14843915130144783, -0.2545596334403233, -0.028927110272297073, 0.24845080191106905, 0.2636616520938419, 0.023138514095326027, -0.2550965465738305, 0.09252873880396938, 0.05156017572338146, 0.19014383411951483, 0.11791006864477245, 0.06253125379601168, 0.09969002786018545, 0.2113357860177371, 0.019636567489850144, 0.11488803324755281, -0.20726280846810413, -0.040352836221693056, -0.4249844851474913, -0.1270951967952507, -0.09029160390445401, 0.08747218157319973, 0.02158631011150733, 0.015238400179124067, 0.3299555918497462, 0.04065640597181055, 0.40253159770416835, 0.006807732924316374, 0.29775184777284425, 0.15446771594089648, 0.03925300600923716, 0.09905381441589385, 0.3634540330441225, 0.09420500167955954, 0.19515201064299734, -0.2794132090158879, -0.024804624935819045, -0.044059464767102215] |
709.2566 | Raman Fingerprint of Charged Impurities in Graphene | We report strong variations in the Raman spectra for different single-layer
graphene samples obtained by micromechanical cleavage, which reveals the
presence of excess charges, even in the absence of intentional doping. Doping
concentrations up to ~10^13 cm-2 are estimated from the G peak shift and width,
and the variation of both position and relative intensity of the second order
2D peak. Asymmetric G peaks indicate charge inhomogeneity on the scale of less
than 1 micron.
| cond-mat.mtrl-sci | we report strong variations in the raman spectra for different singlelayer graphene samples obtained by micromechanical cleavage which reveals the presence of excess charges even in the absence of intentional doping doping concentrations up to 1013 cm2 are estimated from the g peak shift and width and the variation of both position and relative intensity of the second order 2d peak asymmetric g peaks indicate charge inhomogeneity on the scale of less than 1 micron | [['we', 'report', 'strong', 'variations', 'in', 'the', 'raman', 'spectra', 'for', 'different', 'singlelayer', 'graphene', 'samples', 'obtained', 'by', 'micromechanical', 'cleavage', 'which', 'reveals', 'the', 'presence', 'of', 'excess', 'charges', 'even', 'in', 'the', 'absence', 'of', 'intentional', 'doping', 'doping', 'concentrations', 'up', 'to', '1013', 'cm2', 'are', 'estimated', 'from', 'the', 'g', 'peak', 'shift', 'and', 'width', 'and', 'the', 'variation', 'of', 'both', 'position', 'and', 'relative', 'intensity', 'of', 'the', 'second', 'order', '2d', 'peak', 'asymmetric', 'g', 'peaks', 'indicate', 'charge', 'inhomogeneity', 'on', 'the', 'scale', 'of', 'less', 'than', '1', 'micron']] | [-0.11416460879147053, 0.14668384589720518, 0.025398842816551526, 0.011834113403844337, 0.0269537740200758, -0.1069685729003201, 0.08432352526734273, 0.4425260442867875, -0.21857251470287642, -0.38320238909373683, -0.0009114963778605064, -0.3454949945211411, -0.06211398099859555, 0.1546699363986651, -0.011801963125665983, -0.04802388589208325, -0.021147220799078544, -0.04020998898272713, -0.08362423769198359, -0.175961679800724, 0.2690775397171577, 0.05465522465606531, 0.3398061014711857, 0.09692621612300475, 0.034535903812696535, -0.021928290383269388, 0.029693466052412985, 0.0067445908362666765, -0.11054624362538258, 0.09077999241029223, 0.19749769368519385, -0.10266823871061206, 0.19482163852080703, -0.39993499481429656, -0.21152931567591926, 0.04248371203740438, 0.09808615576475858, 0.07758285987967005, -0.04959089246423294, -0.2772304814495146, 0.10410731493184965, -0.08530963227152824, -0.10032377910489837, 0.005226418673992157, 0.05199441110094388, 0.01582059678932031, -0.23482545527319112, 0.1783471737553676, 0.037471686344457945, 0.10867656800895929, -0.11870402221257488, -0.17288079058130582, -0.11819071744879087, 0.05668216243386268, 0.06154199528818329, 0.015412517782921593, 0.24868221316486597, -0.10586356795703371, -0.04775784290085236, 0.36217313799386225, -0.11139681022866474, -0.03276955952246984, 0.13226799125472705, -0.23614449240888158, -0.07014752615243197, 0.23096593814591568, 0.10136159797509511, 0.11153347518915932, -0.0735777443771561, 0.010982879869795095, 0.04253705798958739, 0.2599673700146377, 0.1467086038676401, 0.0887332381408972, 0.21526489965617657, 0.12334197858348489, 0.08384399524579446, 0.11284565102308988, -0.20930532169528304, 0.031568229993184406, -0.2602530244116982, -0.09228594899798433, -0.16621464859694243, 0.08737354851017395, -0.13192878677141076, -0.1452888226447006, 0.40952413353448114, 0.15269539676606655, 0.23823485621561608, -7.987754264225563e-05, 0.23289790193239848, 0.14328124831741054, 0.0865629484007756, -0.007511497425536314, 0.2419788601528853, 0.156950644456471, 0.08362948210909962, -0.27208124204267126, 0.0764074875600636, -0.04454541865736246] |
709.2567 | Transition Distribution Amplitudes | We give a brief overview of the theoretical status of the Transition
Distribution Amplitudes and discuss their experimental near future.
| hep-ph | we give a brief overview of the theoretical status of the transition distribution amplitudes and discuss their experimental near future | [['we', 'give', 'a', 'brief', 'overview', 'of', 'the', 'theoretical', 'status', 'of', 'the', 'transition', 'distribution', 'amplitudes', 'and', 'discuss', 'their', 'experimental', 'near', 'future']] | [-0.169883581972681, 0.13187900162301958, -0.09244316099211573, 0.08011839091777802, -0.10079737482592463, -0.04555965920444578, 0.08842665199190378, 0.3871833339333534, -0.16761872861534358, -0.2801761803450063, 0.14514149867463857, -0.3071869864594191, -0.1547356606926769, 0.1635603841394186, -0.018663388350978492, 0.02833715230226517, 0.09911463218741119, 0.06271678861230612, -0.16947948466986418, -0.1600376583635807, 0.28359587863087654, 0.1035290153697133, 0.29121710509061816, 0.18522134395316242, -0.018625633046030998, 0.04568727002479136, -0.13391211894340813, -0.07059476664289832, -0.26977239725965774, 0.12491192063316703, 0.22535767094232143, 0.19882665947079659, 0.17610590513795615, -0.49408083893358706, -0.11475552476476877, 0.02712731285719201, 0.12143032894236967, 0.1451192220672965, -0.12938658935017883, -0.29574192464351656, 0.006433383756666444, -0.17606053072959185, -0.22619560761377216, -0.08617244688794017, 0.05539064307231456, 0.07481516990810633, -0.16298911403864622, 0.01859785127453506, 0.006627871096134186, 0.1129649359267205, -0.08263047828804701, -0.25785920275375246, 0.0968946376349777, 0.110362235060893, 0.027512963395565748, 0.04282818376086652, 0.11405447379220277, -0.16949182003736496, -0.15344751086086034, 0.3310429350356571, -0.05525246707256883, -0.018135762121528388, 0.12398582397145219, -0.20050287200137973, -0.1310047392267734, 0.04687557555735111, 0.20771142803132533, 0.05296751894056797, -0.1171392020303756, 0.022609564286540262, 0.05713512636721134, 0.007966630533337593, -0.07088951794430613, 0.1505371695617214, 0.35705252913758156, 0.27428373927250504, -0.033259569038636985, 0.15387446228414775, -0.08511431887745857, -0.11953274221159518, -0.5036347286775709, -0.12279875641688705, -0.037506803311407565, 0.053271316643804315, -0.02052888912076014, -0.13248166693374513, 0.48994509167969225, 0.24928982071578504, 0.3039447650313377, 0.0943325673462823, 0.2817077724495903, 0.07248163195326925, -0.15447860435815527, -0.035845446726307274, 0.2872891783714294, 0.14741296656429767, 0.12497023968026041, -0.23029015241190792, 0.0539000035263598, -0.03244736809283495] |
709.2568 | Host galaxies of bright high redshift quasars: Luminosities and colours | We present the results of a near-infrared imaging study of high redshift
(z~3) quasars using the ESO-VLT. Our targets were selected to have luminosities
among the highest known (absolute magnitude M_B <~ -28. We searched for
resolved structures underlying the bright point-source nuclei by comparing the
QSO images with stars located in the same fields. Two QSOs (HE2348-1444 at
z=2.904 and HE2355-5457 at z=2.933) are clearly resolved in K_S, and with
somewhat lower significance also in H; one object is resolved only in K_S. At
these redshifts, H and K_S correspond almost exactlly to rest-frame B and V,
respectively, with virtually no K-correction. We also report briefly the
non-detection of some additional QSOs. The detected host galaxies are extremely
luminous with M_V ~ -25. Their rest-frame B-V colours, however, are close to
zero in the Vega system, indicating substantial contributions from young stars
and a stellar mass-to-light ratio below 1 (in solar units). Tentatively
converting M_V and B-V into rough estimates of stellar masses, we obtain values
of M_star in the range of several 10^11 M_sun, placing them within the
high-mass range of recent high-redshift galaxy surveys. We present optical
spectra and use CIV line width measurements to predict virial black hole
masses, obtaining typical values of M_bh ~ 5x10^9 M_sun. With respect to the
known correlation between host galaxy luminosity L_V(host) and M_bh, our
measurements reach to higher luminosities and redshifts than previous studies,
but are completely consistent with them. Comparing our objects with the local
(z~0) M_bh - M_bulge relation and taking also the low stellar mass-to-light
ratios into account, we find tentative evidence for an excess in the
M_bh/M_bulge mass ratio at z~3.
| astro-ph | we present the results of a nearinfrared imaging study of high redshift z3 quasars using the esovlt our targets were selected to have luminosities among the highest known absolute magnitude m_b 28 we searched for resolved structures underlying the bright pointsource nuclei by comparing the qso images with stars located in the same fields two qsos he23481444 at z2904 and he23555457 at z2933 are clearly resolved in k_s and with somewhat lower significance also in h one object is resolved only in k_s at these redshifts h and k_s correspond almost exactlly to restframe b and v respectively with virtually no kcorrection we also report briefly the nondetection of some additional qsos the detected host galaxies are extremely luminous with m_v 25 their restframe bv colours however are close to zero in the vega system indicating substantial contributions from young stars and a stellar masstolight ratio below 1 in solar units tentatively converting m_v and bv into rough estimates of stellar masses we obtain values of m_star in the range of several 1011 m_sun placing them within the highmass range of recent highredshift galaxy surveys we present optical spectra and use civ line width measurements to predict virial black hole masses obtaining typical values of m_bh 5x109 m_sun with respect to the known correlation between host galaxy luminosity l_vhost and m_bh our measurements reach to higher luminosities and redshifts than previous studies but are completely consistent with them comparing our objects with the local z0 m_bh m_bulge relation and taking also the low stellar masstolight ratios into account we find tentative evidence for an excess in the m_bhm_bulge mass ratio at z3 | [['we', 'present', 'the', 'results', 'of', 'a', 'nearinfrared', 'imaging', 'study', 'of', 'high', 'redshift', 'z3', 'quasars', 'using', 'the', 'esovlt', 'our', 'targets', 'were', 'selected', 'to', 'have', 'luminosities', 'among', 'the', 'highest', 'known', 'absolute', 'magnitude', 'm_b', 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'm_bulge', 'relation', 'and', 'taking', 'also', 'the', 'low', 'stellar', 'masstolight', 'ratios', 'into', 'account', 'we', 'find', 'tentative', 'evidence', 'for', 'an', 'excess', 'in', 'the', 'm_bhm_bulge', 'mass', 'ratio', 'at', 'z3']] | [-0.029257734670663036, 0.10112319209780553, -0.02266818703560347, 0.1308792576111839, -0.08944169472822787, -0.09283180329390568, 0.07633802161485738, 0.5038473238952262, -0.06713979649933034, -0.3948482047107632, 0.04029727013509595, -0.344078869004263, 0.04429366963493467, 0.20464588174966114, -0.031618495171798974, -0.018625542309465695, 0.03142442064070272, -0.1081705292510671, -0.08669511529424948, -0.2968570693441377, 0.28116022489706843, 0.008904218711203124, 0.13508994003569477, -0.03699238501682752, 0.05966868698823681, -0.0986825171500542, -0.10605053515487424, -0.014357883340159382, -0.19750145469157354, 0.021116889453377953, 0.25822387345061965, 0.10357323448846904, 0.19351359634845053, -0.2590167383133165, -0.12149402493007537, 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709.2569 | Comment on "Dynamics of nuclear fluid. VIII. Time-dependent Hartree-Fock
approximation from a classical point of view" | The phase-space paths introduced by Cheuk-Yin Wong in Phys. Rev.C25, 1460
(1982) and discussed recently in the literature can be used for calculation of
evolution of the Wigner function to first order in the time increments only.
The first-order solutions are helpful to determine the phase-space Green
function in the framework of the phase-space path integral method.
| hep-ph | the phasespace paths introduced by cheukyin wong in phys revc25 1460 1982 and discussed recently in the literature can be used for calculation of evolution of the wigner function to first order in the time increments only the firstorder solutions are helpful to determine the phasespace green function in the framework of the phasespace path integral method | [['the', 'phasespace', 'paths', 'introduced', 'by', 'cheukyin', 'wong', 'in', 'phys', 'revc25', '1460', '1982', 'and', 'discussed', 'recently', 'in', 'the', 'literature', 'can', 'be', 'used', 'for', 'calculation', 'of', 'evolution', 'of', 'the', 'wigner', 'function', 'to', 'first', 'order', 'in', 'the', 'time', 'increments', 'only', 'the', 'firstorder', 'solutions', 'are', 'helpful', 'to', 'determine', 'the', 'phasespace', 'green', 'function', 'in', 'the', 'framework', 'of', 'the', 'phasespace', 'path', 'integral', 'method']] | [-0.06444693952798844, 0.08789898362010717, -0.1444256669757041, 0.06615419346331196, -0.04749655696690421, 0.013094644028354774, 0.025780913623219187, 0.3462284250862219, -0.2244709158485586, -0.3061370857737281, 0.03527025000446222, -0.19693025552075016, -0.15953831340778957, 0.1913465678353201, -0.06062370089983398, 0.1349132491275668, 0.001243194980038838, -0.010228256407109174, -0.06041557765989141, -0.26367841222408145, 0.27690828289130215, 0.06172338639470664, 0.24503608325665646, 0.022781074402684516, 0.07903709435327487, 0.07260084523057396, -0.09771080791780895, 0.024120527946136214, -0.18684168087149208, 0.06910888779569756, 0.23862675590948626, 0.09733190141956914, 0.2536049905148419, -0.4009969877925786, -0.20742904662408612, 0.09431373197585344, 0.14078478223051538, 0.11096242339858277, 0.0025606770745732568, -0.3141403405503793, 0.0695356236262755, -0.16464393237097696, -0.1829084773378616, -0.08882402391596274, 0.07341448070312089, 0.06600754525173794, -0.24104913894764401, 0.11799159579995004, 0.0003522440283135934, -0.034751759926703846, -0.0254043600987643, -0.11915622145276178, -0.01327571811323816, 0.08472596068273891, -0.004472569164566018, 0.07834864989431067, 0.06332225798502225, -0.0657061151927337, -0.12301261482590979, 0.3653157370080325, -0.04937916797035458, -0.19710703693668952, 0.10669773380187425, -0.1674531160728789, -0.10901295176114548, 0.16318259879269384, 0.12926751179197296, 0.1698760323988443, -0.23962650630961765, 0.10677722955694083, 0.00953506070443175, 0.07247208760712634, 0.09441890040073883, 0.007363475283438509, 0.11640806687024782, 0.08753231899304824, 0.0026219308884306387, 0.11475310819858515, -0.07750537053427912, -0.1821757909926501, -0.31651884661140767, -0.21886519799855622, -0.22165445651520382, -0.017962259739976037, -0.041886681707480666, -0.11932242648168044, 0.40588676672090185, 0.13866695599969137, 0.18623800995675, 0.01957970504564318, 0.22852644553323362, 0.22249926122074778, 0.04761393962597305, 0.07728272959251295, 0.22537592100826176, 0.1937698793470521, 0.14041139070283282, -0.2269539400173182, 0.045357198683036996, 0.14694388840262862] |
709.257 | Multiwavelength Gamma-Ray Bursts Observations with ECLAIRs | ECLAIRs is the next space borne instrument that will be fully dedicated to
multi-wavelength studies of Gamma-Ray Bursts (GRBs). It consists of a coded
mask telescope with a wide (~2 sr) field of view, made of 6400 CdTe pixels
(~1000 cm^2), which will work in the 4-300 keV energy band. It is expected to
localise ~80 GRBs/yr, thanks to the on-board real time event processing. The
GRBs (and other transients) coordinates will be distributed within a few
seconds from the onset of the burst with a typical uncertainty of ~5-10 arcmin.
The detection system will also include a soft X-ray camera (1-10 keV) allowing
to study in detail the prompt soft X-ray emission and to reduce the error box
for about half of the GRBs seen by ECLAIRs to ~30 arcsec. ECLAIRs is expected
to be flown in late 2011 and to be the only instrument capable of providing GRB
triggers with sufficient localisation accuracy for GRB follow-up observations
with the powerful ground based spectroscopic telescopes available by then. We
will present the current status of the ECLAIRs project and its possible
developments.
| astro-ph | eclairs is the next space borne instrument that will be fully dedicated to multiwavelength studies of gammaray bursts grbs it consists of a coded mask telescope with a wide 2 sr field of view made of 6400 cdte pixels 1000 cm2 which will work in the 4300 kev energy band it is expected to localise 80 grbsyr thanks to the onboard real time event processing the grbs and other transients coordinates will be distributed within a few seconds from the onset of the burst with a typical uncertainty of 510 arcmin the detection system will also include a soft xray camera 110 kev allowing to study in detail the prompt soft xray emission and to reduce the error box for about half of the grbs seen by eclairs to 30 arcsec eclairs is expected to be flown in late 2011 and to be the only instrument capable of providing grb triggers with sufficient localisation accuracy for grb followup observations with the powerful ground based spectroscopic telescopes available by then we will present the current status of the eclairs project and its possible developments | [['eclairs', 'is', 'the', 'next', 'space', 'borne', 'instrument', 'that', 'will', 'be', 'fully', 'dedicated', 'to', 'multiwavelength', 'studies', 'of', 'gammaray', 'bursts', 'grbs', 'it', 'consists', 'of', 'a', 'coded', 'mask', 'telescope', 'with', 'a', 'wide', '2', 'sr', 'field', 'of', 'view', 'made', 'of', '6400', 'cdte', 'pixels', '1000', 'cm2', 'which', 'will', 'work', 'in', 'the', '4300', 'kev', 'energy', 'band', 'it', 'is', 'expected', 'to', 'localise', '80', 'grbsyr', 'thanks', 'to', 'the', 'onboard', 'real', 'time', 'event', 'processing', 'the', 'grbs', 'and', 'other', 'transients', 'coordinates', 'will', 'be', 'distributed', 'within', 'a', 'few', 'seconds', 'from', 'the', 'onset', 'of', 'the', 'burst', 'with', 'a', 'typical', 'uncertainty', 'of', '510', 'arcmin', 'the', 'detection', 'system', 'will', 'also', 'include', 'a', 'soft', 'xray', 'camera', '110', 'kev', 'allowing', 'to', 'study', 'in', 'detail', 'the', 'prompt', 'soft', 'xray', 'emission', 'and', 'to', 'reduce', 'the', 'error', 'box', 'for', 'about', 'half', 'of', 'the', 'grbs', 'seen', 'by', 'eclairs', 'to', '30', 'arcsec', 'eclairs', 'is', 'expected', 'to', 'be', 'flown', 'in', 'late', '2011', 'and', 'to', 'be', 'the', 'only', 'instrument', 'capable', 'of', 'providing', 'grb', 'triggers', 'with', 'sufficient', 'localisation', 'accuracy', 'for', 'grb', 'followup', 'observations', 'with', 'the', 'powerful', 'ground', 'based', 'spectroscopic', 'telescopes', 'available', 'by', 'then', 'we', 'will', 'present', 'the', 'current', 'status', 'of', 'the', 'eclairs', 'project', 'and', 'its', 'possible', 'developments']] | [-0.06804180669450695, 0.1400664700462376, -0.026620549844486304, 0.10210025960088408, -0.12635571444330768, -0.10757800790384575, 0.04361841643783849, 0.4494439141183603, -0.1825865946297885, -0.3847184752577234, 0.12736364810592674, -0.3240116210908838, -0.025121638032574653, 0.24788869753011752, -0.05993312326911328, 0.02642171254064735, 0.11912949293307308, -0.051708494225908785, -0.06770846152791367, -0.27186572201145415, 0.19696000388116053, 0.2148404342880666, 0.19427659188472293, 0.0019976361960050513, 0.11750971164574714, -0.00996363315415757, -0.05555456290352336, -0.03424341765202485, -0.10177693310241588, 0.060341554729502055, 0.3121384669074921, 0.1576492208090504, 0.22038921920704793, -0.3770921340096447, -0.2105086639808501, 0.06922313973277075, 0.11197410953801146, -0.03845772183455064, 0.013239263936519734, -0.3409810935788345, 0.08483350834213808, -0.202885679004948, -0.14876893452048057, 0.046716235494088446, 0.01978610482135574, 0.04547192213695517, -0.1696014757486966, 0.02298524072810453, -0.03586770170762667, 0.04033713619977928, -0.09065560418209112, -0.009129763122195062, 0.03641666207510896, 0.08010895730662948, 0.01757702905089274, 0.11862885437796371, 0.13603053749360836, -0.10536926705899134, -0.06939815370813826, 0.401257352842415, -0.029177332234624875, 0.007534570546688441, 0.14330535154672636, -0.2054692492578586, -0.15282999860508306, 0.23697900707843647, 0.13925535969125727, 0.08270330145532682, -0.1804782600228578, 0.007669824436357845, 0.04985787299375147, 0.25981713491720987, 0.007234097401168747, 0.07414735517785197, 0.26541544629713837, 0.2063262155444916, 0.05699029708245535, 0.11251170056410226, -0.30072723733149265, 0.028814228851783287, -0.30613193132891064, -0.1308264381779756, -0.1408669689903672, 0.09936714775941737, -0.041634899268596044, -0.08555993007221183, 0.4179602863058407, 0.16094410986782057, 0.15743867861987423, 0.0317418527772874, 0.30463522220732736, 0.028396894527749347, 0.1002018360695878, 0.04360582519773028, 0.327110324462092, 0.06880306467855866, 0.14902191440691875, -0.12461403182382018, 0.014153940523618354, -0.006305317548383536] |
709.2571 | Random walk of magnetic field lines for different values of the
energy-range spectral index | An analytical nonlinear description of field-line wandering in partially
statistically magnetic systems was proposed recently [A. Shalchi, I. Kourakis,
Astronomy and Astrophysics, 470, 405 (2007)]. In this article we investigate
the influence of the wave-spectrum in the energy-range onto field line random
walk by applying this formulation. It is demonstrated that in all considered
cases we clearly obtain a superdiffusive behaviour of the field-lines. If the
energy-range spectral index exceeds unity a free-streaming behaviour of the
field-lines can be found for all relevant length-scales of turbulence. Since
the superdiffusive results obtained for the slab model are exact, it seems that
superdiffusion is the normal behavior of field line wandering.
| astro-ph | an analytical nonlinear description of fieldline wandering in partially statistically magnetic systems was proposed recently a shalchi i kourakis astronomy and astrophysics 470 405 2007 in this article we investigate the influence of the wavespectrum in the energyrange onto field line random walk by applying this formulation it is demonstrated that in all considered cases we clearly obtain a superdiffusive behaviour of the fieldlines if the energyrange spectral index exceeds unity a freestreaming behaviour of the fieldlines can be found for all relevant lengthscales of turbulence since the superdiffusive results obtained for the slab model are exact it seems that superdiffusion is the normal behavior of field line wandering | [['an', 'analytical', 'nonlinear', 'description', 'of', 'fieldline', 'wandering', 'in', 'partially', 'statistically', 'magnetic', 'systems', 'was', 'proposed', 'recently', 'a', 'shalchi', 'i', 'kourakis', 'astronomy', 'and', 'astrophysics', '470', '405', '2007', 'in', 'this', 'article', 'we', 'investigate', 'the', 'influence', 'of', 'the', 'wavespectrum', 'in', 'the', 'energyrange', 'onto', 'field', 'line', 'random', 'walk', 'by', 'applying', 'this', 'formulation', 'it', 'is', 'demonstrated', 'that', 'in', 'all', 'considered', 'cases', 'we', 'clearly', 'obtain', 'a', 'superdiffusive', 'behaviour', 'of', 'the', 'fieldlines', 'if', 'the', 'energyrange', 'spectral', 'index', 'exceeds', 'unity', 'a', 'freestreaming', 'behaviour', 'of', 'the', 'fieldlines', 'can', 'be', 'found', 'for', 'all', 'relevant', 'lengthscales', 'of', 'turbulence', 'since', 'the', 'superdiffusive', 'results', 'obtained', 'for', 'the', 'slab', 'model', 'are', 'exact', 'it', 'seems', 'that', 'superdiffusion', 'is', 'the', 'normal', 'behavior', 'of', 'field', 'line', 'wandering']] | [-0.13639669488488793, 0.17788775595436504, -0.0850838811863562, 0.07172438336283873, -0.06038794883257039, -0.10204507931022444, -0.014120001650511105, 0.3859751152100964, -0.23158026472491292, -0.25834445801572264, 0.0749951437859993, -0.2546721186105893, -0.15135790302775035, 0.23172711500697812, -0.00875028028701232, 0.0036939141693063705, 0.03311157391067142, 0.0032526911192826023, 0.009608397808657071, -0.20020024665135228, 0.2561691854862827, 0.056984029880019826, 0.2832237749369206, 0.04201900663733413, 0.06118496561805918, -0.04194135090149069, -0.014766648551013983, 0.05173559575549381, -0.16115726739079494, 0.029483094696112187, 0.2019966220631151, 0.067073534038266, 0.24289212311470063, -0.36262778380763866, -0.24703030007952284, 0.07436377489852293, 0.1930817981798933, 0.07195233404919261, -0.027215344065399927, -0.26444258068244314, 0.06343628223724315, -0.134856441140906, -0.1745619658363339, -0.0019396602472064094, 0.07453711140491764, 0.01959391288833571, -0.2382464537388323, 0.11012520195446282, 0.10288127341142325, 0.07328340346776993, -0.04522533246063601, -0.06189051568595188, 0.005100502463919328, 0.09852687893087202, 0.08110913030844548, 0.02494695614457618, 0.13047002726446655, -0.13503273103438387, -0.08465425340484863, 0.3728744763724297, -0.05528545341123696, -0.15156736525176007, 0.16520137206659974, -0.21449021916732053, -0.11043104573335742, 0.19849867561710216, 0.11118107571954204, 0.09932741132906472, -0.15877319207832774, 0.09651457046965903, -0.08429818117782195, 0.14271577689622608, 0.05277581158242075, -0.04626848603159224, 0.20245246527820965, 0.12855414066150367, 0.025492207507306935, 0.1273331611959055, -0.1052460395034716, -0.09894431133919926, -0.2796059531795087, -0.15105879968619756, -0.18231012333819868, 0.08676025187640199, -0.08302466301930193, -0.17680668332135288, 0.40399426769325947, 0.1893592223755702, 0.18186108964695552, 0.018911905216801667, 0.22694921946135638, 0.1521747694698937, -0.006779525152660001, 0.1137388404502281, 0.274024754849689, 0.16485687877295244, 0.1336287209398557, -0.20218987188684953, 0.04780019666764572, 0.043786162203700046] |
709.2572 | The harmonic oscillator on Riemannian and Lorentzian configuration
spaces of constant curvature | The harmonic oscillator as a distinguished dynamical system can be defined
not only on the Euclidean plane but also on the sphere and on the hyperbolic
plane, and more generally on any configuration space with constant curvature
and with a metric of any signature, either Riemannian (definite positive) or
Lorentzian (indefinite). In this paper we study the main properties of these
`curved' harmonic oscillators simultaneously on any such configuration space,
using a Cayley-Klein (CK) type approach, with two free parameters $\ki, \kii$
which altogether correspond to the possible values for curvature and signature
type: the generic Riemannian and Lorentzian spaces of constant curvature
(sphere ${\bf S}^2$, hyperbolic plane ${\bf H}^2$, AntiDeSitter sphere ${\bf
AdS}^{\unomasuno}$ and DeSitter sphere ${\bf dS}^{\unomasuno}$) appear in this
family, with the Euclidean and Minkowski spaces as flat limits.
We solve the equations of motion for the `curved' harmonic oscillator and
obtain explicit expressions for the orbits by using three different methods:
first by direct integration, second by obtaining the general CK version of the
Binet's equation and third, as a consequence of its superintegrable character.
The orbits are conics with centre at the potential origin in any CK space,
thereby extending this well known Euclidean property to any constant curvature
configuration space. The final part of the article, that has a more geometric
character, presents those results of the theory of conics on spaces of constant
curvature which are pertinent.
| math-ph math.DG math.MP | the harmonic oscillator as a distinguished dynamical system can be defined not only on the euclidean plane but also on the sphere and on the hyperbolic plane and more generally on any configuration space with constant curvature and with a metric of any signature either riemannian definite positive or lorentzian indefinite in this paper we study the main properties of these curved harmonic oscillators simultaneously on any such configuration space using a cayleyklein ck type approach with two free parameters ki kii which altogether correspond to the possible values for curvature and signature type the generic riemannian and lorentzian spaces of constant curvature sphere bf s2 hyperbolic plane bf h2 antidesitter sphere bf adsunomasuno and desitter sphere bf dsunomasuno appear in this family with the euclidean and minkowski spaces as flat limits we solve the equations of motion for the curved harmonic oscillator and obtain explicit expressions for the orbits by using three different methods first by direct integration second by obtaining the general ck version of the binets equation and third as a consequence of its superintegrable character the orbits are conics with centre at the potential origin in any ck space thereby extending this well known euclidean property to any constant curvature configuration space the final part of the article that has a more geometric character presents those results of the theory of conics on spaces of constant curvature which are pertinent | [['the', 'harmonic', 'oscillator', 'as', 'a', 'distinguished', 'dynamical', 'system', 'can', 'be', 'defined', 'not', 'only', 'on', 'the', 'euclidean', 'plane', 'but', 'also', 'on', 'the', 'sphere', 'and', 'on', 'the', 'hyperbolic', 'plane', 'and', 'more', 'generally', 'on', 'any', 'configuration', 'space', 'with', 'constant', 'curvature', 'and', 'with', 'a', 'metric', 'of', 'any', 'signature', 'either', 'riemannian', 'definite', 'positive', 'or', 'lorentzian', 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709.2573 | Band gap unification of partially Si-substituted single wall carbon
nanotubes | The atomic and electronic structure of a set of pristine single wall SiC
nanotubes as well as Si-substituted carbon nanotubes and a SiC sheet was
studied by the LDA plane wave band structure calculations. Consecutive
substitution of carbon atoms by Si leads to a gap opening in the energetic
spectrum of the metallic (8,8) SWCNT with approximately quadratic dependence of
the band gap upon the Si concentration. The same substitution for the
semiconductor (10,0) SWCNT results in a band gap minimum (0.27 eV) at ~25% of
Si concentration. In the Si concentration region of 12-18%, both types of
nanotubes have less than 0.5 eV direct band gaps at the Gamma-Gamma point. The
calculation of the chiral (8,2) SWSi_0.15C_0.85NT system gives a similar (0.6
eV) direct band gap. The regular distribution of Si atoms in the atomic lattice
is by ~0.1 eV/atom energetically preferable in comparison with a random
distribution. Time dependent DFT calculations showed that the silicon
substitution sufficiently increases (roughly by one order of magnitude) the
total probability of optical transitions in the near infrared region, which is
caused by the opening of the direct band gap in metallic SWCNTs, the
unification of the nature and energy of band gaps of all SWCNT species, the
large values of <Si3p|r|Si3s> radial integrals and participation of Si3d states
in chemical bonding in both valence and conductance bands.
| cond-mat.mtrl-sci | the atomic and electronic structure of a set of pristine single wall sic nanotubes as well as sisubstituted carbon nanotubes and a sic sheet was studied by the lda plane wave band structure calculations consecutive substitution of carbon atoms by si leads to a gap opening in the energetic spectrum of the metallic 88 swcnt with approximately quadratic dependence of the band gap upon the si concentration the same substitution for the semiconductor 100 swcnt results in a band gap minimum 027 ev at 25 of si concentration in the si concentration region of 1218 both types of nanotubes have less than 05 ev direct band gaps at the gammagamma point the calculation of the chiral 82 swsi_015c_085nt system gives a similar 06 ev direct band gap the regular distribution of si atoms in the atomic lattice is by 01 evatom energetically preferable in comparison with a random distribution time dependent dft calculations showed that the silicon substitution sufficiently increases roughly by one order of magnitude the total probability of optical transitions in the near infrared region which is caused by the opening of the direct band gap in metallic swcnts the unification of the nature and energy of band gaps of all swcnt species the large values of si3prsi3s radial integrals and participation of si3d states in chemical bonding in both valence and conductance bands | [['the', 'atomic', 'and', 'electronic', 'structure', 'of', 'a', 'set', 'of', 'pristine', 'single', 'wall', 'sic', 'nanotubes', 'as', 'well', 'as', 'sisubstituted', 'carbon', 'nanotubes', 'and', 'a', 'sic', 'sheet', 'was', 'studied', 'by', 'the', 'lda', 'plane', 'wave', 'band', 'structure', 'calculations', 'consecutive', 'substitution', 'of', 'carbon', 'atoms', 'by', 'si', 'leads', 'to', 'a', 'gap', 'opening', 'in', 'the', 'energetic', 'spectrum', 'of', 'the', 'metallic', '88', 'swcnt', 'with', 'approximately', 'quadratic', 'dependence', 'of', 'the', 'band', 'gap', 'upon', 'the', 'si', 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709.2574 | Search for very high energy gamma rays from possible ultra-high energy
cosmic ray sources by the MAGIC Telescope | The origin of ultra-high energy (UHE) cosmic rays is still an open question.
In the present work, we searched the possible UHE cosmic ray sources using the
MAGIC telescope for the associated very high energy (VHE) gamma ray emission.
Due to constrained propagation distance of such cosmic rays, we selected nearby
galaxies in vicinity of the direction of the AGASA triplet and a HiRes UHE
cosmic ray event: NGC 3610 and NGC 3613 (quasar remnants); Arp 299 (a system of
colliding galaxies). No significant excess in the VHE region was found found
from these objects or their surrounding region. At multi-100 GeV regime, the
upper limits on fluxes were given against gamma ray sources in surrounding
region. The presented limits constrain the flux of a new hypothetical source in
the region, provided the cosmic rays are emitted from a single point-like
origin.
| astro-ph | the origin of ultrahigh energy uhe cosmic rays is still an open question in the present work we searched the possible uhe cosmic ray sources using the magic telescope for the associated very high energy vhe gamma ray emission due to constrained propagation distance of such cosmic rays we selected nearby galaxies in vicinity of the direction of the agasa triplet and a hires uhe cosmic ray event ngc 3610 and ngc 3613 quasar remnants arp 299 a system of colliding galaxies no significant excess in the vhe region was found found from these objects or their surrounding region at multi100 gev regime the upper limits on fluxes were given against gamma ray sources in surrounding region the presented limits constrain the flux of a new hypothetical source in the region provided the cosmic rays are emitted from a single pointlike origin | [['the', 'origin', 'of', 'ultrahigh', 'energy', 'uhe', 'cosmic', 'rays', 'is', 'still', 'an', 'open', 'question', 'in', 'the', 'present', 'work', 'we', 'searched', 'the', 'possible', 'uhe', 'cosmic', 'ray', 'sources', 'using', 'the', 'magic', 'telescope', 'for', 'the', 'associated', 'very', 'high', 'energy', 'vhe', 'gamma', 'ray', 'emission', 'due', 'to', 'constrained', 'propagation', 'distance', 'of', 'such', 'cosmic', 'rays', 'we', 'selected', 'nearby', 'galaxies', 'in', 'vicinity', 'of', 'the', 'direction', 'of', 'the', 'agasa', 'triplet', 'and', 'a', 'hires', 'uhe', 'cosmic', 'ray', 'event', 'ngc', '3610', 'and', 'ngc', '3613', 'quasar', 'remnants', 'arp', '299', 'a', 'system', 'of', 'colliding', 'galaxies', 'no', 'significant', 'excess', 'in', 'the', 'vhe', 'region', 'was', 'found', 'found', 'from', 'these', 'objects', 'or', 'their', 'surrounding', 'region', 'at', 'multi100', 'gev', 'regime', 'the', 'upper', 'limits', 'on', 'fluxes', 'were', 'given', 'against', 'gamma', 'ray', 'sources', 'in', 'surrounding', 'region', 'the', 'presented', 'limits', 'constrain', 'the', 'flux', 'of', 'a', 'new', 'hypothetical', 'source', 'in', 'the', 'region', 'provided', 'the', 'cosmic', 'rays', 'are', 'emitted', 'from', 'a', 'single', 'pointlike', 'origin']] | [-0.09119468033049546, 0.1676784840236783, -0.01950512013351875, 0.19381319941826503, -0.0716938723063638, -0.009872515045159251, 0.039421627118007826, 0.44003833910278606, -0.18726480238191026, -0.3654783861183211, -0.035034739175408496, -0.3593387098599833, 0.06592274284657382, 0.23917646258772213, 0.023619279859039326, -0.047033723780607925, 0.07558178362363936, -0.0466348774853354, 0.05108934945999876, -0.19913053656234703, 0.2584686555688316, 0.26096999318114356, 0.21041774376566316, 0.054757666585848054, 0.1342956017379167, -0.08344096744248101, -0.09526152149542955, -0.09035423198873375, -0.11562830786359438, 0.06935620787495694, 0.2219398270892838, 0.12281874644715365, 0.11142871041777247, -0.35458201194406613, -0.26486868168316546, 0.1704810580819951, 0.19860992275165223, -0.02330827794936882, -0.10216572502353856, -0.3648182958205964, 0.054103353419729196, -0.1403290197122776, -0.2060248318940718, 0.1736660877850356, -0.038451757683279984, 0.0399105040098917, -0.13160738848968812, 0.08029574312348949, -0.040520601718461946, 0.03573124819903317, -0.13927735121431925, -0.08540545849060203, 0.024691721060352913, 0.06096023064377513, 0.10578803828560766, 0.07610005875537502, 0.18882164162920512, -0.1431452821385353, -0.08482616270664445, 0.4029226717506106, -0.03798203669729517, -0.0028890850689552777, 0.20747693629063507, -0.23840905530836454, -0.21466670512611455, 0.24317232500563593, 0.16614380717303948, 0.09661540649302885, -0.20532804719628173, 0.10807256706815266, 0.004510823891544384, 0.14785661722338553, 0.08045812303048447, 0.05121284965937627, 0.3204750607437487, 0.09056016449743869, 0.0720721146633439, 0.08368953701491791, -0.30786141738541595, 0.07649594447732382, -0.32534963580786336, -0.08427489036529041, -0.17053791290439718, 0.13726857678257987, -0.10483689744711576, -0.10639320953224013, 0.33654361864195226, 0.052323670569041095, 0.1992622518660963, -0.0470246278997907, 0.26031226006911157, 0.017245079512899438, -0.019748367300646788, 0.16530918387088475, 0.37749501370580485, 0.12401043357829569, 0.11424293666615659, -0.2051874672439187, 0.04369047332839076, 0.00863288627303344] |
709.2575 | Realization of a semiconductor-based cavity soliton laser | The realization of a cavity soliton laser using a vertical-cavity
surface-emitting semiconductor gain structure coupled to an external cavity
with a frequency-selective element is reported. All-optical control of bistable
solitonic emission states representing small microlasers is demonstrated by
injection of an external beam. The control scheme is phase-insensitive and
hence expected to be robust for all-optical processing applications. The
motility of these structures is also demonstrated.
| physics.optics | the realization of a cavity soliton laser using a verticalcavity surfaceemitting semiconductor gain structure coupled to an external cavity with a frequencyselective element is reported alloptical control of bistable solitonic emission states representing small microlasers is demonstrated by injection of an external beam the control scheme is phaseinsensitive and hence expected to be robust for alloptical processing applications the motility of these structures is also demonstrated | [['the', 'realization', 'of', 'a', 'cavity', 'soliton', 'laser', 'using', 'a', 'verticalcavity', 'surfaceemitting', 'semiconductor', 'gain', 'structure', 'coupled', 'to', 'an', 'external', 'cavity', 'with', 'a', 'frequencyselective', 'element', 'is', 'reported', 'alloptical', 'control', 'of', 'bistable', 'solitonic', 'emission', 'states', 'representing', 'small', 'microlasers', 'is', 'demonstrated', 'by', 'injection', 'of', 'an', 'external', 'beam', 'the', 'control', 'scheme', 'is', 'phaseinsensitive', 'and', 'hence', 'expected', 'to', 'be', 'robust', 'for', 'alloptical', 'processing', 'applications', 'the', 'motility', 'of', 'these', 'structures', 'is', 'also', 'demonstrated']] | [-0.20767723459919746, 0.1686445513469428, -0.03315141204405914, -0.05404042563344719, -0.0578337199985981, -0.23212665262293408, -0.018255456467159092, 0.5119188104078851, -0.2560928223767515, -0.23688571527600288, 0.06495666654893395, -0.20914216174490072, -0.12184901188381693, 0.2863057764303504, -0.05093276122528495, 0.09440101852471178, -0.014107509300987604, -0.0629366984604999, 0.06259194381224613, -0.12110069636467168, 0.22430878193258788, 0.06587264808177044, 0.35963200817279745, 0.007858361540870233, 0.18135973098546718, -0.054900004722488426, 0.10384383532359745, -0.0787576103131428, -0.055109128574699615, 0.1101782941885617, 0.25259065753286425, 0.008443880910900507, 0.26186412342675874, -0.4454666114779133, -0.2896880428588977, 0.048106331917965275, 0.18039124819210195, 0.2053046559802059, -0.1706166663630442, -0.32948934461808566, 0.06190652625324825, -0.17732257822133374, -0.15752520037560977, -0.05623306223953312, 0.004509513619158304, 0.05202102078350656, -0.32400310178954067, -0.03767808315839802, 0.03689706968108305, 0.05321364815939556, -0.04692881792840181, 0.02448798685024182, -0.024829558089770602, 0.014996461309210368, -0.11034081999043172, -0.0005285777998241512, 0.235260129398243, -0.13771648175845091, -0.1854902756202853, 0.3528602986709412, -0.0703945719552311, -0.17820957706620297, 0.12346078596557632, -0.07247097771544235, 0.0478871156969531, 0.18397879881332768, 0.16207014683238935, 0.10220741575132265, -0.1266493087812595, 0.013802306274142624, 0.006233721703403827, 0.2679991615710385, 0.1262881544729074, 0.14698312531056051, 0.2006924125581105, 0.27360668092627416, 0.09381936836959512, 0.22172586800297722, -0.09729715661766629, -0.07264370163620422, -0.255856745565931, -0.1255605362327487, -0.1618605178682077, 0.08259865115961117, -0.042758534013101424, -0.16135441974708528, 0.3761251735851891, 0.08417535583827306, 0.11001263532053793, -0.07605979456142946, 0.3788816292459766, 0.16065305230123075, 0.06701325279462969, 0.0037622457849934244, 0.2796458747999912, 0.23125724243635143, 0.08131378789601679, -0.31030347319602064, -0.005704926744907756, -0.08150735553918463] |
709.2576 | A Better Definition of the Kilogram | Fixing the value of Avogadro's constant, the number of atoms in 12 grams of
carbon-12, at exactly 84446886^3 would imply that one gram is the mass of
exactly 18x14074481^3 carbon-12 atoms. This new definition of the gram, and
thereby also the kilogram, is precise, elegant and unchanging in time, unlike
the current 118-year-old artifact kilogram in Paris and the proposed
experimental definitions of the kilogram using man-made silicon spheres or the
watt balance apparatus.
| physics.gen-ph | fixing the value of avogadros constant the number of atoms in 12 grams of carbon12 at exactly 844468863 would imply that one gram is the mass of exactly 18x140744813 carbon12 atoms this new definition of the gram and thereby also the kilogram is precise elegant and unchanging in time unlike the current 118yearold artifact kilogram in paris and the proposed experimental definitions of the kilogram using manmade silicon spheres or the watt balance apparatus | [['fixing', 'the', 'value', 'of', 'avogadros', 'constant', 'the', 'number', 'of', 'atoms', 'in', '12', 'grams', 'of', 'carbon12', 'at', 'exactly', '844468863', 'would', 'imply', 'that', 'one', 'gram', 'is', 'the', 'mass', 'of', 'exactly', '18x140744813', 'carbon12', 'atoms', 'this', 'new', 'definition', 'of', 'the', 'gram', 'and', 'thereby', 'also', 'the', 'kilogram', 'is', 'precise', 'elegant', 'and', 'unchanging', 'in', 'time', 'unlike', 'the', 'current', '118yearold', 'artifact', 'kilogram', 'in', 'paris', 'and', 'the', 'proposed', 'experimental', 'definitions', 'of', 'the', 'kilogram', 'using', 'manmade', 'silicon', 'spheres', 'or', 'the', 'watt', 'balance', 'apparatus']] | [-0.08270361669555071, 0.17019047776014137, -0.02073003945242561, 0.0032540488492986057, -0.022311103648283113, -0.13749598575309968, 0.06393622315790452, 0.3082603659533279, -0.18762322464747958, -0.3756705863584935, 0.055955910669888934, -0.29011787272150247, -0.05734871012079989, 0.16578530658915325, -0.04439068897824052, 0.047854207154415865, 0.020483061395795414, 0.07610608800642298, -0.06903084844652511, -0.23764066926767707, 0.2576554769413992, 0.1221994577618447, 0.23002500426758762, 0.09862761373277491, 0.15750469226704936, -0.021198721399242188, -0.005423609600205656, -0.02530522497606949, -0.0979536863304814, 0.15097281954933325, 0.18064555546726282, 0.11541419127352641, 0.22710178380595966, -0.4397223760229601, -0.11278499685831263, 0.08572192734081141, 0.07560284009439425, 0.0824893168632833, -0.01502394966099044, -0.20578698691925112, 0.02460505040755994, -0.1561381551535459, -0.16563176734923896, -0.026048730534147208, 0.07439500027873987, -0.010375049148856754, -0.22805689138845658, 0.08668550122553863, 0.038847694029165825, 0.06351598667007097, -0.061686340273475984, -0.19624877195070747, 0.02747207175625462, 0.08146099760328275, 0.031197434337153822, -0.008835397909959438, 0.18108314097347394, -0.07336173237721161, -0.053795057781775235, 0.40078994972814974, -0.04287306402324581, -0.1639620683772463, 0.15324962889434587, -0.1368600655950501, -0.08574948606120658, 0.12632931597058622, 0.04823865915950335, 0.08357614290598832, -0.15016126304759947, 0.07427488554442878, -0.04937406255401225, 0.20207938300052158, 0.17363459189278138, 0.01987072309269242, 0.2085052324904942, 0.1373700122152206, 0.06844774912386922, 0.05800720329173434, -0.0706142894923687, -0.06897210502918337, -0.31994454856489746, -0.24612690076809113, -0.20954312296243202, 0.053689253739487956, -0.1016329366733848, -0.12038232491049967, 0.37439936756248204, 0.14097517398251613, 0.16060194546278095, 0.016667611647764563, 0.2984040127017758, 0.05150307724121171, 0.12807727246020567, 0.004295456465858389, 0.2782778058358481, 0.1035652372618796, 0.10311389593801028, -0.22929745693494316, 0.03703326318727832, 0.08674293498731625] |
709.2577 | Local holomorphic Euler characteristic and instanton decay | We study the local holomorphic Euler characteristic $\chi(x,\mathcal{F})$ of
sheaves near a surface singularity obtained from contracting a line $\ell$
inside a smooth surface $Z$. We prove non-existence of sheaves with certain
prescribed numerical invariants. Non-existence of instantons on $Z$ with
certain charges follows, and we conclude that $\ell^2$ poses an obstruction to
instanton decay. A Macaulay 2 algorithm to compute $\chi$ is made available at
http://www.maths.ed.ac.uk/~s0571100/Instanton/
| math.AG hep-th | we study the local holomorphic euler characteristic chixmathcalf of sheaves near a surface singularity obtained from contracting a line ell inside a smooth surface z we prove nonexistence of sheaves with certain prescribed numerical invariants nonexistence of instantons on z with certain charges follows and we conclude that ell2 poses an obstruction to instanton decay a macaulay 2 algorithm to compute chi is made available at httpwwwmathsedacuks0571100instanton | [['we', 'study', 'the', 'local', 'holomorphic', 'euler', 'characteristic', 'chixmathcalf', 'of', 'sheaves', 'near', 'a', 'surface', 'singularity', 'obtained', 'from', 'contracting', 'a', 'line', 'ell', 'inside', 'a', 'smooth', 'surface', 'z', 'we', 'prove', 'nonexistence', 'of', 'sheaves', 'with', 'certain', 'prescribed', 'numerical', 'invariants', 'nonexistence', 'of', 'instantons', 'on', 'z', 'with', 'certain', 'charges', 'follows', 'and', 'we', 'conclude', 'that', 'ell2', 'poses', 'an', 'obstruction', 'to', 'instanton', 'decay', 'a', 'macaulay', '2', 'algorithm', 'to', 'compute', 'chi', 'is', 'made', 'available', 'at', 'httpwwwmathsedacuks0571100instanton']] | [-0.2414827154806027, 0.07296203894455595, -0.1203593848201518, 0.08691313198875063, -0.0807108881095281, -0.1859740859613969, -0.019573769378117643, 0.3202999253399097, -0.3043205041724902, -0.1881539431042396, 0.07002362760428626, -0.2665072694958116, -0.12792194427635808, 0.18278635463748988, -0.0733430198035561, 0.027339917321044665, 0.04184652954483262, 0.063258668114073, -0.1252208901175226, -0.26487135637838105, 0.416070330457744, -0.04926996421955454, 0.1687319482354304, 0.10913331161897916, 0.09636883780790063, -0.03614221001043916, -0.03444796723241989, -0.025109456855660447, -0.2426268373012695, 0.09382600420369552, 0.2556492489762604, 0.048591492844458954, 0.16321550021664455, -0.3961980042835841, -0.12565747145563363, 0.19110992105247882, 0.1449322298455697, 0.07167514506011055, -0.032502682473009026, -0.2890977799176024, 0.1764103972997803, -0.10157940893505628, -0.23016137165518907, -0.04940943526677214, 0.02719066753410376, 0.03537911792429021, -0.23236962112669762, 0.03567206842394976, 0.04592156857252121, 0.12053571542581687, -0.10637139556571268, -0.0962240472722512, -0.10507736016924564, 0.031436693575233224, 0.07236375238818045, 0.09362719542203614, 0.14103354510063162, -0.14842790524976757, -0.0994628335062701, 0.2976586414572711, -0.10035803174743285, -0.20155882623691398, 0.12313657576361528, -0.17024211534298955, -0.11308253562937562, 0.21884516466122408, 0.09227482152099793, 0.18293865231367257, 0.04320836419669481, 0.1676528401269864, -0.09500343508015459, 0.1262637795164035, 0.1438594455472552, -0.03971474611988435, 0.1890869029582693, 0.05645473638119606, 0.09346854659513786, 0.10909163927157911, -0.0736622082033696, -0.019008377853494424, -0.4351912448899104, -0.19111692234873773, -0.13436964912913166, 0.2264527355822233, -0.08034914815776015, -0.2062876101726523, 0.3479809043212579, 0.03051922576358685, 0.251657282647032, 0.16834483072161674, 0.22193888558361394, 0.04335359390825033, 0.012026286968746438, 0.06870951875327871, 0.14210066262346047, 0.15900178269411508, -0.013768062790712484, -0.16134239804142944, -0.07867449074267195, 0.22005896046757698] |
709.2578 | Testing Error Correcting Codes by Multicanonical Sampling of Rare Events | The idea of rare event sampling is applied to the estimation of the
performance of error-correcting codes. The essence of the idea is importance
sampling of the pattern of noises in the channel by Multicanonical Monte Carlo,
which enables efficient estimation of tails of the distribution of bit error
rate. The idea is successfully tested with a convolutional code.
| cond-mat.dis-nn cond-mat.stat-mech | the idea of rare event sampling is applied to the estimation of the performance of errorcorrecting codes the essence of the idea is importance sampling of the pattern of noises in the channel by multicanonical monte carlo which enables efficient estimation of tails of the distribution of bit error rate the idea is successfully tested with a convolutional code | [['the', 'idea', 'of', 'rare', 'event', 'sampling', 'is', 'applied', 'to', 'the', 'estimation', 'of', 'the', 'performance', 'of', 'errorcorrecting', 'codes', 'the', 'essence', 'of', 'the', 'idea', 'is', 'importance', 'sampling', 'of', 'the', 'pattern', 'of', 'noises', 'in', 'the', 'channel', 'by', 'multicanonical', 'monte', 'carlo', 'which', 'enables', 'efficient', 'estimation', 'of', 'tails', 'of', 'the', 'distribution', 'of', 'bit', 'error', 'rate', 'the', 'idea', 'is', 'successfully', 'tested', 'with', 'a', 'convolutional', 'code']] | [-0.12668133029808937, 0.0771813222080848, -0.14938681081758212, 0.10595847057944195, 0.01069231602063371, -0.14881291261763643, 0.06178117417177911, 0.371372791480715, -0.2985729115178524, -0.323256769864741, 0.1265471939025131, -0.21631444873824968, -0.11603062599897385, 0.1910972185432911, -0.10689476096087087, 0.1642247827692052, 0.12159207445900824, 0.01633697088365838, -0.0971240640590283, -0.2914504414834714, 0.27600441405833775, 0.21164865596062046, 0.33578245010290103, -0.066068058849265, 0.13711066521956758, 0.021401626294699765, -0.08240378521761652, -0.08356798130829456, -0.11433155007534108, 0.13962647112054846, 0.23026762094538092, 0.1793862610297688, 0.292566296660294, -0.34371628763817125, -0.23380471666548716, 0.06127253528368675, 0.15834725332462182, 0.1628805754930215, -0.08904495533019052, -0.2694976796096159, 0.10267709388192427, -0.20925153856623477, -0.04159612997861232, 0.013952876662172504, -0.06260775233287427, 0.0502143876185104, -0.3265933327503123, 0.05989751686989251, 0.061114344903725686, 0.023733046221531044, 0.08584263077068885, -0.10738406443999986, 0.03470327037433952, 0.12742039573110514, 0.05481676376716755, 0.041377697747705854, 0.12334313275987062, -0.1165393389903514, -0.17008967006231768, 0.34797196769376554, -0.029619471775762483, -0.2217993612985237, 0.12197618564626328, -0.1046994404188531, -0.0791072549625947, 0.20751520312564858, 0.18874154136500368, 0.11295039279354831, -0.14848276114848963, 0.06551082523034538, 0.02729909402965489, 0.1633737437206052, -0.04117029873354329, 0.029685346977943082, 0.14976107978293576, 0.21224802104219542, 6.909753685280428e-05, 0.18965147686648673, -0.236548090827162, -0.1569310471403681, -0.23932307322264917, -0.1578058367910779, -0.2799834309114238, -0.030519459222964312, -0.12481071585315769, -0.1905925067741487, 0.41264788301314337, 0.23746172053013312, 0.13171599106073884, 0.07326959267897942, 0.3294584777016761, 0.03562880132221064, 0.08386497840411582, 0.08037960676129087, 0.1662625829862841, 0.17909820756275144, 0.008146089485893815, -0.24009062572761233, 0.15108322416100714, 0.09098387983927535] |
709.2579 | Some fundamental problems for an energy conserving adaptive resolution
molecular dynamics scheme | Adaptive resolution molecular dynamics (MD) schemes allow for changing the
number of degrees of freedom on the fly and preserve the free exchange of
particles between regions of different resolution. There are two main
alternatives on how to design the algorithm to switch resolution using
auxiliary ''switching'' functions; force based and potential energy based
approach. In this work we show that, in the framework of classical MD, the
latter presents fundamental conceptual problems which make unlikely, if not
impossible, the derivation of a robust algorithm based on the potential energy.
| cond-mat.stat-mech | adaptive resolution molecular dynamics md schemes allow for changing the number of degrees of freedom on the fly and preserve the free exchange of particles between regions of different resolution there are two main alternatives on how to design the algorithm to switch resolution using auxiliary switching functions force based and potential energy based approach in this work we show that in the framework of classical md the latter presents fundamental conceptual problems which make unlikely if not impossible the derivation of a robust algorithm based on the potential energy | [['adaptive', 'resolution', 'molecular', 'dynamics', 'md', 'schemes', 'allow', 'for', 'changing', 'the', 'number', 'of', 'degrees', 'of', 'freedom', 'on', 'the', 'fly', 'and', 'preserve', 'the', 'free', 'exchange', 'of', 'particles', 'between', 'regions', 'of', 'different', 'resolution', 'there', 'are', 'two', 'main', 'alternatives', 'on', 'how', 'to', 'design', 'the', 'algorithm', 'to', 'switch', 'resolution', 'using', 'auxiliary', 'switching', 'functions', 'force', 'based', 'and', 'potential', 'energy', 'based', 'approach', 'in', 'this', 'work', 'we', 'show', 'that', 'in', 'the', 'framework', 'of', 'classical', 'md', 'the', 'latter', 'presents', 'fundamental', 'conceptual', 'problems', 'which', 'make', 'unlikely', 'if', 'not', 'impossible', 'the', 'derivation', 'of', 'a', 'robust', 'algorithm', 'based', 'on', 'the', 'potential', 'energy']] | [-0.10652064213645644, 0.07393553199039565, -0.12488735495652589, 0.0329535073070373, -0.06591285181542238, -0.1509856193792075, 0.055758996583366145, 0.3993902719890078, -0.2731171747928278, -0.3303028968680236, 0.051177672983612865, -0.17854040859060155, -0.18311807599125637, 0.19463811891360416, -0.04223318908674022, 0.024403840629383923, 0.06628013922212024, 0.00698581740208384, -0.030938964205173156, -0.22128484758237998, 0.321631052174295, 0.09364564143535163, 0.28712617023330594, 0.06474200715828272, 0.15351524204015732, 0.02683478211207936, -0.017626508291707272, 0.013944103668392119, -0.14475032483630154, 0.1658182188299381, 0.19513133289033754, 0.126927161278824, 0.2797904880769137, -0.46738185273069477, -0.17824976144151555, 0.09814796621083385, 0.11804977560726305, 0.10030145717965853, -0.0393333668122068, -0.21541937514104778, 0.0700161153347128, -0.12340451849934955, -0.11236593855751885, -0.09655346349657824, -0.03455220100780328, 0.061930181761272254, -0.24404960344545543, 0.06217883458981911, 0.016680416061232488, 0.04980514290639096, -0.05837694320620762, -0.11121854762443238, 0.02222729490345551, 0.1199799664835963, 0.02613476199718813, 0.008085415351928936, 0.13238489628614236, -0.10542966546232088, -0.13525847232279678, 0.3855800786676506, -0.015363603835511538, -0.25274995470600614, 0.22904619644137306, -0.09768838344348801, -0.1256323172400395, 0.13764100464888746, 0.1548870325398942, 0.13322163385649521, -0.1392844381638699, 0.07370082634475289, 0.034837413077346155, 0.2046300573533194, 0.05630959843854523, 0.05394920981489122, 0.17901963097974657, 0.17418212807840772, 0.097781300265342, 0.09664265535150965, -0.08453812166893233, -0.1699505333452382, -0.29500637747761277, -0.13741954929298825, -0.19421561387781466, 0.026395379992674054, -0.07066980282122838, -0.1310394096136507, 0.3809723760622243, 0.21969439714901254, 0.15522221027511277, 0.02122549296796529, 0.35572116275628407, 0.04814553639023668, 0.06075162096983856, 0.07473523340498407, 0.22516720870302784, 0.10348665716850923, 0.06601961754365927, -0.2570764317073756, 0.0215963885291583, 0.05923971463408735] |
709.258 | Pulse variation of the optical emission of Crab pulsar | The stability of the optical pulse of the Crab pulsar is analyzed based on
the 1 $\mu$s resolution observations with the Russian 6-meter and William
Hershel telescopes equipped with different photon-counting detectors. The
search for the variations of the pulse shape along with its arrival time
stability is performed. Upper limits on the possible short time scale free
precession of the pulsar are placed. The evidence of pulse time of arrival
(TOA) variations on 1.5-2 hours time scale is presented, along with evidence of
small light curve (shape and separation of main and secondary peaks) changes
between data sets, on time scale of years. Also, the fine structure of the main
pulse is studied.
| astro-ph | the stability of the optical pulse of the crab pulsar is analyzed based on the 1 mus resolution observations with the russian 6meter and william hershel telescopes equipped with different photoncounting detectors the search for the variations of the pulse shape along with its arrival time stability is performed upper limits on the possible short time scale free precession of the pulsar are placed the evidence of pulse time of arrival toa variations on 152 hours time scale is presented along with evidence of small light curve shape and separation of main and secondary peaks changes between data sets on time scale of years also the fine structure of the main pulse is studied | [['the', 'stability', 'of', 'the', 'optical', 'pulse', 'of', 'the', 'crab', 'pulsar', 'is', 'analyzed', 'based', 'on', 'the', '1', 'mus', 'resolution', 'observations', 'with', 'the', 'russian', '6meter', 'and', 'william', 'hershel', 'telescopes', 'equipped', 'with', 'different', 'photoncounting', 'detectors', 'the', 'search', 'for', 'the', 'variations', 'of', 'the', 'pulse', 'shape', 'along', 'with', 'its', 'arrival', 'time', 'stability', 'is', 'performed', 'upper', 'limits', 'on', 'the', 'possible', 'short', 'time', 'scale', 'free', 'precession', 'of', 'the', 'pulsar', 'are', 'placed', 'the', 'evidence', 'of', 'pulse', 'time', 'of', 'arrival', 'toa', 'variations', 'on', '152', 'hours', 'time', 'scale', 'is', 'presented', 'along', 'with', 'evidence', 'of', 'small', 'light', 'curve', 'shape', 'and', 'separation', 'of', 'main', 'and', 'secondary', 'peaks', 'changes', 'between', 'data', 'sets', 'on', 'time', 'scale', 'of', 'years', 'also', 'the', 'fine', 'structure', 'of', 'the', 'main', 'pulse', 'is', 'studied']] | [-0.1701910774215337, 0.1384626074710436, -0.0787805092210571, 0.044517179767258074, -0.06579051578515455, -0.09558048652558539, 0.016323728366906085, 0.4500133908239373, -0.229120503147051, -0.3683197169295071, 0.1538197588861773, -0.2585461787928484, -0.0009324368367200357, 0.26383977943598375, -0.03438890803801386, 0.0409145518200954, 0.11368936695272855, 0.013631353363100635, -0.050593693449117016, -0.20370597504625676, 0.2518127921768546, 0.14030913521715424, 0.25038019542606843, 0.01951338708596794, 0.14008167761136991, 0.002258750442578866, -0.06639037234708667, -0.06507963446181333, -0.10292084024516507, 0.0810680124789845, 0.16098653539819152, 0.1075868582058894, 0.17184962067761245, -0.42388425106101, -0.1829624258537303, 0.04462551238554481, 0.08429386401998304, -0.008665470210345168, -0.02048479355749135, -0.3232301490977733, 0.030793820426129458, -0.07612710315407369, -0.13333152406522186, 0.08271459819189388, 0.07724029776689254, 0.11848928524883823, -0.15016587676833743, 0.06023238551687539, 0.00110026940768748, 0.08815751215540028, -0.10004284648273729, -0.09222871652118077, 0.0220935952057245, 0.12215537296836837, 0.10043469007666174, 0.019168603323857513, 0.09850008133798838, -0.052276264933313714, -0.09826480107087839, 0.38539026126984444, -0.10803642941295709, -0.05870088256421711, 0.14053853540150285, -0.21223628801996247, -0.11555206695195745, 0.1945970540523137, 0.16807913317818912, 0.115826669761813, -0.10220720327363284, 0.0443156614941504, 0.011815241578835668, 0.28436295537833584, 0.12819756237839006, 0.05877973952559395, 0.19597925223704232, 0.235441726778446, 0.06680542273904409, 0.0964194036062333, -0.2642879472400078, -0.059189087035759404, -0.29622029807222516, -0.0717950241901634, -0.1641136267336837, 0.04429714616976286, -0.12032925203126515, -0.08922901105854594, 0.46173352554947006, 0.11382407569244765, 0.1787069206648882, 0.04932610068078104, 0.3175938145968279, 0.12144612090400699, 0.04763822531401131, 0.03363592318144806, 0.24568617830804565, 0.11429613793121748, 0.1445510346654868, -0.24207745481837997, 0.07613152337440274, -0.014529146874944368] |
709.2581 | X-Ray Analysis of Oxygen-induced Perpendicular Magnetic Anisotropy in
Pt/Co/AlOx trilayer | X-ray spectroscopy measurements have been performed on a series of Pt/Co/AlOx
trilayers to investigate the role of Co oxidation in the perpendicular magnetic
anisotropy of the Co/AlOx interface. It is observed that high temperature
annealing modifies the magnetic properties of the Co layer, inducing an
enhancement of the perpendicular magnetic anisotropy. The microscopic
structural properties are analyzed via X-ray Absorption Spectroscopy, X-ray
Magnetic Circular Dichroism and X-ray Photoelectron Spectroscopy measurements.
It is shown that annealing enhances the amount of interfacial oxide, which may
be at the origin of a strong perpendicular magnetic anisotropy.
| cond-mat.mes-hall cond-mat.mtrl-sci | xray spectroscopy measurements have been performed on a series of ptcoalox trilayers to investigate the role of co oxidation in the perpendicular magnetic anisotropy of the coalox interface it is observed that high temperature annealing modifies the magnetic properties of the co layer inducing an enhancement of the perpendicular magnetic anisotropy the microscopic structural properties are analyzed via xray absorption spectroscopy xray magnetic circular dichroism and xray photoelectron spectroscopy measurements it is shown that annealing enhances the amount of interfacial oxide which may be at the origin of a strong perpendicular magnetic anisotropy | [['xray', 'spectroscopy', 'measurements', 'have', 'been', 'performed', 'on', 'a', 'series', 'of', 'ptcoalox', 'trilayers', 'to', 'investigate', 'the', 'role', 'of', 'co', 'oxidation', 'in', 'the', 'perpendicular', 'magnetic', 'anisotropy', 'of', 'the', 'coalox', 'interface', 'it', 'is', 'observed', 'that', 'high', 'temperature', 'annealing', 'modifies', 'the', 'magnetic', 'properties', 'of', 'the', 'co', 'layer', 'inducing', 'an', 'enhancement', 'of', 'the', 'perpendicular', 'magnetic', 'anisotropy', 'the', 'microscopic', 'structural', 'properties', 'are', 'analyzed', 'via', 'xray', 'absorption', 'spectroscopy', 'xray', 'magnetic', 'circular', 'dichroism', 'and', 'xray', 'photoelectron', 'spectroscopy', 'measurements', 'it', 'is', 'shown', 'that', 'annealing', 'enhances', 'the', 'amount', 'of', 'interfacial', 'oxide', 'which', 'may', 'be', 'at', 'the', 'origin', 'of', 'a', 'strong', 'perpendicular', 'magnetic', 'anisotropy']] | [-0.1538801285756191, 0.1753731230237854, -0.04979284739081738, 0.0033296557488821208, -0.06800274614004358, -0.06277251441872889, 0.0067181306420474925, 0.48921627126714234, -0.3168727328540176, -0.35711126732489756, -0.013818897323192207, -0.3421856227220707, -0.07055634069907409, 0.2078621949705105, 0.1363387857313438, 0.003422369379349934, -0.019608693247440682, -0.09897953853191387, -0.07607422651402572, -0.20111566165872719, 0.22967628101938434, 0.11686599704246688, 0.33784021028587896, 0.13504449782832975, 0.03339943021375646, 0.00385097298590887, 0.10522963873721579, 0.06072019985426338, -0.12079271834461965, 0.026886659536650905, 0.19271890702907757, -0.09852409335504216, 0.17231072227080022, -0.46335090967696363, -0.23228263349262296, -0.03294051357454831, 0.12685693627704056, 0.07396810462132537, -0.1049833311912133, -0.20333036151464268, 0.07169831970766667, -0.029063746202937377, -0.1320381908607419, -0.07826749856273334, -0.030232813865226763, 0.013388818618090402, -0.24768749660541933, 0.09666679070521426, 0.0510348310263487, 0.16379054583689218, -0.1771917458853975, -0.05992386650334122, -0.15198865338098458, 0.008534298719017095, 0.07390390781645653, 0.08373153680855389, 0.2543024014411194, -0.095762495241899, -0.0999491680113058, 0.2982548058473615, -0.056788224506602494, 0.002034164043844387, 0.15376893467500166, -0.23418336323592612, -0.13929304338851442, 0.20954950132797803, 0.1047744635212165, 0.14970665838148806, -0.1495966614193974, 0.08424506320615589, 0.001702266156933801, 0.22647129913030933, 0.08787524385968604, 0.07683943996145841, 0.28085897339668164, 0.1552931917580946, 0.0030555959305255324, 0.17966882801259196, -0.24327780931977736, 0.06837508761103675, -0.14266364024050773, -0.17944440528029396, -0.19740809127438053, 0.09344630232281102, -0.08729848572067411, -0.20226183977142045, 0.33610823515662425, 0.1467589732241987, 0.16568248712968442, -0.16383347673446783, 0.31642012899335953, 0.11828246190693349, 0.07368371637928631, -0.007648552462498667, 0.3255082622711216, 0.2762773187971243, 0.16610369559437518, -0.3782086451988547, 0.18695536096610368, -0.03918316794599416] |
709.2582 | Intrinsic dissipation in cantilevers | We consider the effects of a velocity-independent friction force on
cantilever damping. It is shown that this dissipation mechanism causes
nonlinear effects in the cantilever vibrations. The size of the nonlinearity
increases with decreasing cantilever velocity. Our analysis makes it possible
to understand experiments [Stipe et al, PRL 87, 096801 (2001)] where an
amplitude dependence of the cantilever eigenfrequency and anomalous dissipation
was observed only at small amplitudes.
| physics.ins-det | we consider the effects of a velocityindependent friction force on cantilever damping it is shown that this dissipation mechanism causes nonlinear effects in the cantilever vibrations the size of the nonlinearity increases with decreasing cantilever velocity our analysis makes it possible to understand experiments stipe et al prl 87 096801 2001 where an amplitude dependence of the cantilever eigenfrequency and anomalous dissipation was observed only at small amplitudes | [['we', 'consider', 'the', 'effects', 'of', 'a', 'velocityindependent', 'friction', 'force', 'on', 'cantilever', 'damping', 'it', 'is', 'shown', 'that', 'this', 'dissipation', 'mechanism', 'causes', 'nonlinear', 'effects', 'in', 'the', 'cantilever', 'vibrations', 'the', 'size', 'of', 'the', 'nonlinearity', 'increases', 'with', 'decreasing', 'cantilever', 'velocity', 'our', 'analysis', 'makes', 'it', 'possible', 'to', 'understand', 'experiments', 'stipe', 'et', 'al', 'prl', '87', '096801', '2001', 'where', 'an', 'amplitude', 'dependence', 'of', 'the', 'cantilever', 'eigenfrequency', 'and', 'anomalous', 'dissipation', 'was', 'observed', 'only', 'at', 'small', 'amplitudes']] | [-0.1800412383302351, 0.190388010128674, -0.06001859631583984, -0.007607012475430688, -0.13647515804214932, -0.11473984018996802, 0.015360427651999157, 0.3212939593106953, -0.24130208107795734, -0.3183289072128819, -0.005107873651970511, -0.3085980210592275, -0.19609690798835747, 0.2283237881319069, -0.06455737218927982, 0.05180323344252225, 0.03518052736589157, -0.04023441483280552, 0.05516906765571086, -0.20049882592953075, 0.2166668743332987, 0.1351590708398552, 0.32179613897938336, 0.08735229943726044, 0.13246546286755978, -0.019424703187791808, 0.016442785984767016, 0.004466685244062943, -0.19015566162722022, -0.03478083977086553, 0.13976077219721542, -0.078848637425021, 0.27746703914964377, -0.4048862085163371, -0.20252732205579974, 0.038141040478958124, 0.09359988491328906, 0.18412694618550698, 0.03428003069277463, -0.24831408191708598, -0.02786265999954472, -0.13215368656691776, -0.16718467696284903, -0.0683383906065528, 0.15238113007021706, -0.005086840046986715, -0.2801216851586281, 0.16097032951204968, 0.09845018564070117, 0.03406009347692354, -0.06582848710327674, -0.06580700425069723, -0.021029596081448356, 0.02570273757064298, 0.07297068284025221, 0.03214624191203447, 0.245498879777907, -0.0678135170914066, -0.05622855743476704, 0.3445249405001471, -0.08136587562873515, -0.1563939351637139, 0.1844803561845711, -0.18529094206586258, -0.045174160209890984, 0.14704752135187832, 0.16080035508346202, 0.038729032800435576, -0.1108957853084847, 0.04775065164092177, 0.042745424205187094, 0.25106982068061384, 0.16236557598475979, -0.01682815662543498, 0.13467290355309622, 0.19830123343463266, 0.022367726497129717, 0.13452024073357374, -0.16559888049438873, -0.016789022734069, -0.2774727988654553, -0.06099704533481776, -0.19165858173214678, 0.04027861499039929, -0.047522385385532086, -0.14495057772641737, 0.3051987807474919, 0.1609731889677359, 0.2175726815363142, -0.019933687456980792, 0.3312675231205883, 0.1563501606657128, 0.07274426393377692, 0.05846581295994458, 0.3729625112835818, 0.19701963843805576, 0.1246436089138264, -0.3912763960047889, 0.07400597582585108, -0.0224403819180469] |
709.2583 | Test of unparticle long range forces from perihelion precession of
Mercury | Unparticle exchange gives rise to long range forces which deviate from the
inverse square law due to non-canonical dimension of unparticles. It is well
known that a potential of the form $r^{-n}$ where $n$ is not equal to one gives
rise to a precession in the perihelion of planetary orbits. We calculate the
constraints on unparticle couplings with baryons and leptons from the
observations of perihelion advance of Mercury orbit.
| hep-ph astro-ph gr-qc | unparticle exchange gives rise to long range forces which deviate from the inverse square law due to noncanonical dimension of unparticles it is well known that a potential of the form rn where n is not equal to one gives rise to a precession in the perihelion of planetary orbits we calculate the constraints on unparticle couplings with baryons and leptons from the observations of perihelion advance of mercury orbit | [['unparticle', 'exchange', 'gives', 'rise', 'to', 'long', 'range', 'forces', 'which', 'deviate', 'from', 'the', 'inverse', 'square', 'law', 'due', 'to', 'noncanonical', 'dimension', 'of', 'unparticles', 'it', 'is', 'well', 'known', 'that', 'a', 'potential', 'of', 'the', 'form', 'rn', 'where', 'n', 'is', 'not', 'equal', 'to', 'one', 'gives', 'rise', 'to', 'a', 'precession', 'in', 'the', 'perihelion', 'of', 'planetary', 'orbits', 'we', 'calculate', 'the', 'constraints', 'on', 'unparticle', 'couplings', 'with', 'baryons', 'and', 'leptons', 'from', 'the', 'observations', 'of', 'perihelion', 'advance', 'of', 'mercury', 'orbit']] | [-0.12686948789549726, 0.19596720174221055, -0.08245048797024147, 0.09223808168566652, -0.15469170892611145, -0.14701865670670355, 0.006198826485446521, 0.2547527572938374, -0.24523231901361475, -0.3096643130827163, 0.003436608421283641, -0.3093662881558495, -0.11291887092603636, 0.19025374645633356, -0.03113911712009992, -0.010457738475607974, 0.02113413933464991, 0.09124917367506506, -0.048858683539687524, -0.24170700976225948, 0.2726783628841596, 0.04797449218375342, 0.09033948414559875, 0.060009055647866, 0.09872724251555545, 0.0011795414345605033, 0.04203661462691213, -0.06859269742188709, -0.15153354483908124, 0.08894785749060767, 0.1515817679464817, 0.047809176077134904, 0.1211974720004946, -0.376966209483466, -0.1474150170372533, 0.12655719715736008, 0.13203558711601154, 0.12390616114218055, 0.009473437235491084, -0.30121189816189664, 0.009572855356548513, -0.23192280444449612, -0.17502779139072766, -0.05214001095986792, 0.10186103894375265, -0.017363592037664993, -0.31252835784772676, 0.08293086012126878, 0.06895022182226447, 0.02632134534152491, -0.09987136281228491, -0.12601190232006568, -0.021366597406033958, 0.09232865659619814, 0.20214325827546417, 0.06977772331530495, 0.12903700107708574, -0.1046969064910497, -0.10861714129070087, 0.48015430800483694, -0.09414499143936804, -0.14694106852901834, 0.18553157850567784, -0.22602503941660482, -0.06903807927987406, 0.16452497307743344, 0.2143373450796519, 0.05048028270799217, -0.12485565500599997, 0.1704988164286728, -0.010271074396691152, 0.1470618980936706, 0.11103495126590132, 0.048237411178914565, 0.2698069835879973, 0.09217284967058471, 0.12178610915850316, 0.073257721641234, -0.09760122238325754, -0.12387862291985324, -0.29644433962447303, -0.10082591925747693, -0.19959110752014178, 0.15871437073905587, -0.0983811457838913, -0.14236264174271906, 0.3694669967084857, 0.14568962205999664, 0.257847601454705, 0.0386508883559145, 0.2646512926290078, 0.09650969610416464, 0.13388466050050088, 0.07694864593712347, 0.33361457756587437, 0.17532713091267008, 0.093953563053427, -0.20913955137532736, 0.03146574201195368, 0.06650396142421024] |
709.2584 | Sur la cohomologie \`a support des fibr\'es en droites sur les
vari\'et\'es sym\'etriques compl\`etes | Let $X$ be a complete symmetric variety i.e. the wonderful compactification
of a symmetric $G-$homogeneous space (where $G$ is a simply-connected
semi-simple linear algebraic group). If $L$ is a line bundle over $X$ and if
$C$ is a Bialynicki-Birula cell of codimension $c$ in $X$, then the Lie algebra
$\mathfrak g$ of $G$ operates naturally on the cohomology group with support :
$H^c_C(L)$. One gives here a necessary condition on the cell $C$ for that
$\mathfrak g-$module have a finite dimensional simple subquotient. As
applications one calculates the Euler-Poincar\'e characteristic of $L$ over $X$
and one estimates the higher cohomology group $H^d(X,L)$, $d \ge 0$, with exact
formulae in some cases among which the case of the complete conic variety. --
\'Etant donn\'e un groupe alg\'ebrique lin\'eaire semi-simple G, on
s'int\'eresse aux compactifications magnifiques des G?espaces homog\`enes
sym\'etriques. Si X est une telle compactification, si L est un fibr\'e en
droites G?lin\'earis\'e sur X et si C est une cellule de Bialynicki-Birula de X
de codimension c, alors l'alg\`ebre de Lie g de G op\`ere naturellement sur le
groupe de cohomologie \`a support Hc C (L). On donne ici une condition
n\'ecessaire, portant sur la cellule C, pour que ce g?module poss\`ede un
sous-quotient simple de dimension finie. On en d\'eduit une formule pour la
caract\'eristique d'Euler-Poincar\'e de L sur X et une estimation (exacte pour
certains cas dont celui de la vari\'et\'e des coniques compl\`etes) des groupes
de cohomologie sup\'erieure Hd(X,L), d ? 0.
| math.AG math.RT | let x be a complete symmetric variety ie the wonderful compactification of a symmetric ghomogeneous space where g is a simplyconnected semisimple linear algebraic group if l is a line bundle over x and if c is a bialynickibirula cell of codimension c in x then the lie algebra mathfrak g of g operates naturally on the cohomology group with support hc_cl one gives here a necessary condition on the cell c for that mathfrak gmodule have a finite dimensional simple subquotient as applications one calculates the eulerpoincare characteristic of l over x and one estimates the higher cohomology group hdxl d ge 0 with exact formulae in some cases among which the case of the complete conic variety etant donne un groupe algebrique lineaire semisimple g on sinteresse aux compactifications magnifiques des gespaces homogenes symetriques si x est une telle compactification si l est un fibre en droites glinearise sur x et si c est une cellule de bialynickibirula de x de codimension c alors lalgebre de lie g de g opere naturellement sur le groupe de cohomologie a support hc c l on donne ici une condition necessaire portant sur la cellule c pour que ce gmodule possede un sousquotient simple de dimension finie on en deduit une formule pour la caracteristique deulerpoincare de l sur x et une estimation exacte pour certains cas dont celui de la variete des coniques completes des groupes de cohomologie superieure hdxl d 0 | [['let', 'x', 'be', 'a', 'complete', 'symmetric', 'variety', 'ie', 'the', 'wonderful', 'compactification', 'of', 'a', 'symmetric', 'ghomogeneous', 'space', 'where', 'g', 'is', 'a', 'simplyconnected', 'semisimple', 'linear', 'algebraic', 'group', 'if', 'l', 'is', 'a', 'line', 'bundle', 'over', 'x', 'and', 'if', 'c', 'is', 'a', 'bialynickibirula', 'cell', 'of', 'codimension', 'c', 'in', 'x', 'then', 'the', 'lie', 'algebra', 'mathfrak', 'g', 'of', 'g', 'operates', 'naturally', 'on', 'the', 'cohomology', 'group', 'with', 'support', 'hc_cl', 'one', 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-0.2826403151840794, 0.11901979289698975, 0.04267537499499786, 0.2142343369289402, 0.2378117075327026, 0.44956741628622093, -0.03805791464678589, 0.06293461566818152, 0.19594148599272554, -0.09723145077085663, 0.09488125395501493, 0.035023512513763816, 0.021219895207937968, -0.21283270003026133, -0.011009556019590014, 0.14746292093889668, -0.3184270634496327, -0.37397733843306813, -0.0250327000616207, 0.20656515226106753, -0.11297318044995981, -0.2557081204689878, 0.17730484622403642, -0.04831356653722922, 0.1426999365408941, 0.09708210229682152, 0.08575847822451134, -0.1621424310978752, -0.07488951909867846, 0.05425675199074808, 0.0006434510814003824, 0.17559288640847245, 0.10760819812140728, -0.20954553152785285, -0.11196924249935912, 0.31872622106220266] |
709.2585 | Stimulated Globular Scattering of Laser Radiation in Photonic Crystals:
Temperature Dependences | Stimulated globular scattering (SGS) characteristics (frequency shifts,
threshold, conversion efficiency) have been studied in photonic crystals
(synthetic opal matrices and opal nanocomposites) at different temperatures.
Results have been compared with stimulated Raman scattering investigations in
calcite single crystals. In both cases temperature lowering from +20 C to -196
C resulted in the stimulated scattering energy increase and its redistribution
to the higher order components.
| physics.optics | stimulated globular scattering sgs characteristics frequency shifts threshold conversion efficiency have been studied in photonic crystals synthetic opal matrices and opal nanocomposites at different temperatures results have been compared with stimulated raman scattering investigations in calcite single crystals in both cases temperature lowering from 20 c to 196 c resulted in the stimulated scattering energy increase and its redistribution to the higher order components | [['stimulated', 'globular', 'scattering', 'sgs', 'characteristics', 'frequency', 'shifts', 'threshold', 'conversion', 'efficiency', 'have', 'been', 'studied', 'in', 'photonic', 'crystals', 'synthetic', 'opal', 'matrices', 'and', 'opal', 'nanocomposites', 'at', 'different', 'temperatures', 'results', 'have', 'been', 'compared', 'with', 'stimulated', 'raman', 'scattering', 'investigations', 'in', 'calcite', 'single', 'crystals', 'in', 'both', 'cases', 'temperature', 'lowering', 'from', '20', 'c', 'to', '196', 'c', 'resulted', 'in', 'the', 'stimulated', 'scattering', 'energy', 'increase', 'and', 'its', 'redistribution', 'to', 'the', 'higher', 'order', 'components']] | [-0.034125500125810504, 0.21781321118032793, -0.018938784356578253, -0.03834365410148166, -0.02927707881462993, -0.10474416806027875, 0.07860012460150756, 0.5007433067257807, -0.23274736194434809, -0.3237103186911554, 0.01890766335418448, -0.37873367278371006, -0.03975612264184747, 0.21949732315260917, 0.07187095028348267, 0.10263003331692744, 0.030090327920333948, -0.09460643898000853, -0.03959733771625906, -0.18806169615709223, 0.19992749961966183, 0.09587278537946986, 0.4160280224059534, 0.1279433150193654, 0.008213254637666978, -0.011961305932345567, 0.018361336158704944, -0.06510783937281417, -0.1128094122686889, 0.04635378451399674, 0.2997522743535228, -0.05170898226060672, 0.16052298079011962, -0.4450527244480327, -0.2694309823855292, 0.062477400177158415, 0.17548558214548393, 0.12621125004807254, -0.1264057880416658, -0.2168676482178853, 0.03212665101455059, -0.17860537364322226, -0.0896618859260343, -0.029615275117976125, 0.0629096436459804, 0.00035814993316307664, -0.2206904040358495, 0.04195193885243498, -0.01725147602701327, 0.12926827400224283, -0.12431919537084468, -0.22302519186632708, -0.05542133966082474, 0.009248740621842444, -0.004726169099740218, -0.041352204483700916, 0.1937060764321359, -0.10113200638443232, -0.1512984915952984, 0.36490950791630894, -0.0752396206753474, -0.034058712612022646, 0.21802263545396272, -0.1827884046942927, -0.06632475366495783, 0.26548842053307453, 0.18130852666217834, 0.06837986559912679, -0.13272552110538527, 0.051949526690805214, 0.060899766722286586, 0.18958091680542566, 0.2135720454971306, 0.04825096241256688, 0.15234861693897983, 0.1684116924297996, -0.11016411544471794, 0.12623021734543727, -0.13951195010304218, -0.01736838262877427, -0.13265850678726565, -0.11897718826003256, -0.13779113101918483, 0.013744842954110936, -0.0875821444928988, -0.08352937485324219, 0.3219554852694273, 0.10344094216998201, 0.18533841647513327, -0.07383556148852222, 0.24509526386100333, 0.19379809605015907, 0.12446371264013578, 0.003892213564540725, 0.3001286516482651, 0.2093316928803688, 0.2006495550594991, -0.28573213658455643, 0.030470894642348867, -0.06737386218446773] |
709.2586 | Generalized characteristics of the homogenous magneto hydrodynamical
equations | With the help of the generalized characteristics(GC) of the first order
partial differential equations(PDE) we calculate the differential equation
system of characteristics of the homogenous magneto hydrodynamical
equations(MHD).
| physics.plasm-ph | with the help of the generalized characteristicsgc of the first order partial differential equationspde we calculate the differential equation system of characteristics of the homogenous magneto hydrodynamical equationsmhd | [['with', 'the', 'help', 'of', 'the', 'generalized', 'characteristicsgc', 'of', 'the', 'first', 'order', 'partial', 'differential', 'equationspde', 'we', 'calculate', 'the', 'differential', 'equation', 'system', 'of', 'characteristics', 'of', 'the', 'homogenous', 'magneto', 'hydrodynamical', 'equationsmhd']] | [-0.1757442387394034, -0.023725112792677604, -0.08101219927462247, 0.010664451580781203, -0.10661246871145871, -0.02037158551124426, -0.06626963293036589, 0.19056008311991507, -0.31622191260640437, -0.2988483839883254, 0.06695880739089961, -0.3390070741924529, -0.14655607666533726, 0.1760165818537084, 0.034169497254949346, 0.13049672579822633, 0.003540747507940978, 0.033934418067264445, -0.10819185689951365, -0.2478356738216602, 0.4557328522205353, 0.017624489869026896, 0.18039833639676756, -0.04303821025846096, 0.1920236455133328, -0.02730444930672932, -0.08193379182081956, 0.03032672519867237, -0.2336836905720142, 0.0859133388238171, 0.17676721398647016, -0.0024972438740615663, 0.19081340314677128, -0.47094758542684406, -0.19066775862414104, 0.030687405906904202, 0.09389280628126401, 0.14221682488949647, 0.017854116033189572, -0.27105934660022074, 0.10357084759296133, -0.19620134094013617, -0.1972497978892464, -0.0462635404860171, -0.05276800298060362, 0.12865891572661126, -0.2527636028826237, 0.10843202400092895, 0.07681244024290489, 0.023653968747776862, -0.09121629137259263, -0.06598074779433843, -0.06699717531088166, 0.10815293406351255, -0.06709746636736852, -0.08949387046651772, 0.01349817425943911, -0.13344274253512806, -0.09619974545561351, 0.40303505384005034, -0.1573769908102874, -0.20892492588609457, 0.07363825864516772, -0.23529580608010292, -0.0781895317710363, 0.16208782938953775, 0.23993978921610576, 0.175361493942686, -0.17895927977784035, 0.02889768059293811, -0.009424431392779717, 0.14613477093203422, 0.016772847407712385, -0.026423818431794643, 0.10700034568659388, 0.1544910901441024, 0.00010160270791787367, 0.1302253653635629, -0.08458926084523018, -0.09814459121284577, -0.31221790310855096, -0.24667470968471697, -0.04567264722516903, 0.09537725824003036, -0.09555967277153216, -0.15257502476183268, 0.40100860982560194, 0.14464614049603158, 0.175232744238411, -0.02103960682423069, 0.2818519384242021, 0.2798331811164434, -0.020470868366268966, -0.013310155723817073, 0.19913729978277564, 0.25167436761638295, 0.19093007773447496, -0.37596554022568923, 0.06404110918251368, 0.08389344995913024] |
709.2587 | The isodiametric problem with lattice-point constraints | In this paper, the isodiametric problem for centrally symmetric convex bodies
in the Euclidean d-space R^d containing no interior non-zero point of a lattice
L is studied. It is shown that the intersection of a suitable ball with the
Dirichlet-Voronoi cell of 2L is extremal, i.e., it has minimum diameter among
all bodies with the same volume. It is conjectured that these sets are the only
extremal bodies, which is proved for all three dimensional and several
prominent lattices.
| math.MG math.NT | in this paper the isodiametric problem for centrally symmetric convex bodies in the euclidean dspace rd containing no interior nonzero point of a lattice l is studied it is shown that the intersection of a suitable ball with the dirichletvoronoi cell of 2l is extremal ie it has minimum diameter among all bodies with the same volume it is conjectured that these sets are the only extremal bodies which is proved for all three dimensional and several prominent lattices | [['in', 'this', 'paper', 'the', 'isodiametric', 'problem', 'for', 'centrally', 'symmetric', 'convex', 'bodies', 'in', 'the', 'euclidean', 'dspace', 'rd', 'containing', 'no', 'interior', 'nonzero', 'point', 'of', 'a', 'lattice', 'l', 'is', 'studied', 'it', 'is', 'shown', 'that', 'the', 'intersection', 'of', 'a', 'suitable', 'ball', 'with', 'the', 'dirichletvoronoi', 'cell', 'of', '2l', 'is', 'extremal', 'ie', 'it', 'has', 'minimum', 'diameter', 'among', 'all', 'bodies', 'with', 'the', 'same', 'volume', 'it', 'is', 'conjectured', 'that', 'these', 'sets', 'are', 'the', 'only', 'extremal', 'bodies', 'which', 'is', 'proved', 'for', 'all', 'three', 'dimensional', 'and', 'several', 'prominent', 'lattices']] | [-0.14949207467504458, 0.12481771423658237, -0.032023450583691083, 0.033266630548323635, -0.014157351203663628, -0.1370594214789475, -0.023971839989181842, 0.3576541262283874, -0.230783404499481, -0.17300261087314803, 0.16654245535654452, -0.3322944008285486, -0.14585906413348415, 0.16143641635021078, -0.09728052517652654, 0.0740757967180372, 0.050607136091146664, 0.10398000098552697, -0.028585742245416476, -0.31535015358955043, 0.3346715025026115, -0.05816763417008392, 0.21082424690734736, 0.05369604108383572, 0.10404730162618658, -0.003145960676837477, 0.02911069713933747, 0.1214315886314534, -0.14440919111480588, 0.16157688045891921, 0.2515799911527694, 0.1204936806867017, 0.23217744394382345, -0.3373342206866681, -0.20364886052800413, 0.18454164474070828, 0.1021081424978432, 0.039107127874040436, -0.024228617177592424, -0.17158917898807344, 0.14698795645344484, -0.0865579818499192, -0.1707122897245933, 0.006239577349794062, 0.14607795907915394, -0.012484607157073443, -0.25945876776889154, -0.004871928357059443, 0.12227366164420979, 0.048447773013782655, -0.05471044169927511, -0.168071566302848, -0.04765858961478512, 0.08404167312126654, 0.017913552216265963, 0.07927287454551817, 0.05448685746191989, -0.016339189052906718, -0.08666840974901673, 0.43569209078279664, 0.06387003586786694, -0.24280810575413553, 0.21541330939795397, -0.23147531147881212, -0.09357532396134507, 0.15034503876113722, 0.11281100827375357, 0.15473503062996682, -0.16128666662387078, 0.18127752394825103, -0.16029991827245, 0.10238658148490329, 0.16678942858441909, 0.007406008516768394, 0.20136273106489377, 0.14264011651696049, 0.1627310479201282, 0.16759084015893103, -0.044231085224619396, -0.12236044560618038, -0.32121261080750557, -0.17010054400167132, -0.24257530401979538, 0.05293412029130172, -0.1199100581113812, -0.19525037147970487, 0.29957209296577575, -0.004317890570861511, 0.18412004901638515, 0.033855915601001284, 0.22156330488056322, 0.04374018427915871, 0.10089990987642845, 0.13099383602590783, 0.2109063690929096, 0.10561925094704368, 0.011819310421477767, -0.17501884229669842, -0.004881733244497187, 0.11136678588588404] |
709.2588 | Beam Wandering in the Atmosphere: The Effect of Partial Coherence | The effect of a random phase screen on laser beam wander in a turbulent
atmosphere is studied theoretically. The method of photon distribution function
is used to describe the photon kinetics of both weak and strong turbulence. By
bringing together analytical and numerical calculations, we have obtained the
variance of beam centroid deflections caused by scattering on turbulent eddies.
It is shown that an artificial distortion of the initial coherence of the
radiation can be used to decrease the wandering effect. The physical mechanism
responsible for this reduction and applicability of our approach are discussed.
| quant-ph | the effect of a random phase screen on laser beam wander in a turbulent atmosphere is studied theoretically the method of photon distribution function is used to describe the photon kinetics of both weak and strong turbulence by bringing together analytical and numerical calculations we have obtained the variance of beam centroid deflections caused by scattering on turbulent eddies it is shown that an artificial distortion of the initial coherence of the radiation can be used to decrease the wandering effect the physical mechanism responsible for this reduction and applicability of our approach are discussed | [['the', 'effect', 'of', 'a', 'random', 'phase', 'screen', 'on', 'laser', 'beam', 'wander', 'in', 'a', 'turbulent', 'atmosphere', 'is', 'studied', 'theoretically', 'the', 'method', 'of', 'photon', 'distribution', 'function', 'is', 'used', 'to', 'describe', 'the', 'photon', 'kinetics', 'of', 'both', 'weak', 'and', 'strong', 'turbulence', 'by', 'bringing', 'together', 'analytical', 'and', 'numerical', 'calculations', 'we', 'have', 'obtained', 'the', 'variance', 'of', 'beam', 'centroid', 'deflections', 'caused', 'by', 'scattering', 'on', 'turbulent', 'eddies', 'it', 'is', 'shown', 'that', 'an', 'artificial', 'distortion', 'of', 'the', 'initial', 'coherence', 'of', 'the', 'radiation', 'can', 'be', 'used', 'to', 'decrease', 'the', 'wandering', 'effect', 'the', 'physical', 'mechanism', 'responsible', 'for', 'this', 'reduction', 'and', 'applicability', 'of', 'our', 'approach', 'are', 'discussed']] | [-0.12210579403602567, 0.18426397761075733, -0.11022103604321418, 0.10775940582695367, -0.022549681855659736, -0.061101033646417294, 0.009634970867467162, 0.3870080198014253, -0.2620807080676681, -0.29778459973535254, 0.0354268419617591, -0.24776101960359434, -0.11427919572513355, 0.23659385931187946, -0.012759431539789626, 0.08227415710418044, 0.025832377540829933, -0.05336837660717337, 0.019074891764964713, -0.2008651705042116, 0.3002152955257579, 0.1300724037628817, 0.3125365565089803, 0.09465835093961734, 0.11326190350871337, -0.019745619550935532, -0.030452775479735513, 0.030680376791248198, -0.11351126637838253, 0.06961254722585804, 0.15065649641481668, 0.06291896465087407, 0.2437474036785333, -0.43514461262445703, -0.27194859286476125, 0.062087811358383316, 0.16517188010345163, 0.13083296755426807, -0.07806933974406045, -0.2827296252803583, 0.0616273345474742, -0.14155162425809784, -0.13776027104866348, -0.04066417985840848, 0.007658890757317606, 0.06109663454239796, -0.2702132626142549, 0.08117023309398638, 0.06089605692970125, 0.0577699471380727, -0.05476794649209631, -0.06983175556126393, -0.02296733834388617, 0.08606611881405116, 0.07659864124449853, 0.04393523491330837, 0.17944103030880032, -0.09745498577770041, -0.06547945414326693, 0.3943570312700774, -0.06894098340876792, -0.19851716035290767, 0.14158957686863446, -0.15489516288385188, -0.03582105517485424, 0.20531636017227645, 0.17966134026646613, 0.08611063994957428, -0.11785015559902316, 0.007910532683844826, 0.0033659126266444984, 0.1599928926480444, 0.058466097714967635, 0.021470873886229175, 0.18782626947044934, 0.1662770270418964, 0.02972301646920019, 0.17717895810614878, -0.15773834185674787, -0.07261293719669706, -0.2808915709488486, -0.0920704313014683, -0.20820144664643234, 0.03947041304782033, -0.06890461335991092, -0.13624107677973563, 0.36412965252897456, 0.19151403172137707, 0.15233905255598457, -0.02107892116090577, 0.3250828992869509, 0.15958079358097166, 0.04941835712739512, 0.031094514002937727, 0.2984070295271905, 0.19231198423934218, 0.10642667342663596, -0.2888241305702219, 0.10706610875694375, 0.021257749932671065] |
709.2589 | A post-Newtonian diagnosis of quasiequilibrium configurations of neutron
star-neutron star and neutron star-black hole binaries | We use a post-Newtonian diagnostic tool to examine numerically generated
quasiequilibrium initial data sets for non-spinning double neutron star and
neutron star-black hole binary systems. The PN equations include the effects of
tidal interactions, parametrized by the compactness of the neutron stars and by
suitable values of ``apsidal'' constants, which measure the degree of
distortion of stars subjected to tidal forces. We find that the post-Newtonian
diagnostic agrees well with the double neutron star initial data, typically to
better than half a percent except where tidal distortions are becoming extreme.
We show that the differences could be interpreted as representing small
residual eccentricity in the initial orbits. In comparing the diagnostic with
preliminary numerical data on neutron star-black hole binaries, we find less
agreement.
| gr-qc astro-ph | we use a postnewtonian diagnostic tool to examine numerically generated quasiequilibrium initial data sets for nonspinning double neutron star and neutron starblack hole binary systems the pn equations include the effects of tidal interactions parametrized by the compactness of the neutron stars and by suitable values of apsidal constants which measure the degree of distortion of stars subjected to tidal forces we find that the postnewtonian diagnostic agrees well with the double neutron star initial data typically to better than half a percent except where tidal distortions are becoming extreme we show that the differences could be interpreted as representing small residual eccentricity in the initial orbits in comparing the diagnostic with preliminary numerical data on neutron starblack hole binaries we find less agreement | [['we', 'use', 'a', 'postnewtonian', 'diagnostic', 'tool', 'to', 'examine', 'numerically', 'generated', 'quasiequilibrium', 'initial', 'data', 'sets', 'for', 'nonspinning', 'double', 'neutron', 'star', 'and', 'neutron', 'starblack', 'hole', 'binary', 'systems', 'the', 'pn', 'equations', 'include', 'the', 'effects', 'of', 'tidal', 'interactions', 'parametrized', 'by', 'the', 'compactness', 'of', 'the', 'neutron', 'stars', 'and', 'by', 'suitable', 'values', 'of', 'apsidal', 'constants', 'which', 'measure', 'the', 'degree', 'of', 'distortion', 'of', 'stars', 'subjected', 'to', 'tidal', 'forces', 'we', 'find', 'that', 'the', 'postnewtonian', 'diagnostic', 'agrees', 'well', 'with', 'the', 'double', 'neutron', 'star', 'initial', 'data', 'typically', 'to', 'better', 'than', 'half', 'a', 'percent', 'except', 'where', 'tidal', 'distortions', 'are', 'becoming', 'extreme', 'we', 'show', 'that', 'the', 'differences', 'could', 'be', 'interpreted', 'as', 'representing', 'small', 'residual', 'eccentricity', 'in', 'the', 'initial', 'orbits', 'in', 'comparing', 'the', 'diagnostic', 'with', 'preliminary', 'numerical', 'data', 'on', 'neutron', 'starblack', 'hole', 'binaries', 'we', 'find', 'less', 'agreement']] | [-0.1299260020736725, 0.12439015796858698, -0.05197824667547754, 0.17538780305204132, -0.09299573177216394, -0.06124783319330985, 0.03922379680349672, 0.31966896259015604, -0.1767218431660665, -0.3331670057471661, 0.03190907235858181, -0.3171436091351713, -0.041227706820674, 0.2904487088127362, -0.033175816721913796, 0.04702390352136835, 0.15146325418121, 0.026326846591414762, -0.12158135448642556, -0.2302869442604377, 0.37173569976021686, 0.06618425766787221, 0.09662655809323394, -0.05443582375113282, 0.047821763855960944, 0.004178810983918787, -0.01891718075926145, 0.007088650500537047, -0.19329276767377684, 0.01626490288594317, 0.24389985591293342, 0.10913075039148211, 0.18302008481095394, -0.40638829545177063, -0.20147059341487025, 0.05244243868641676, 0.1457460274630707, 0.10991856460027667, -0.08185729858814739, -0.25652176265758764, 0.10186571896455492, -0.28834262672793437, -0.17048150482362195, -0.08979933461054199, 0.06692632792457458, 0.11082955255199434, -0.2911527743863483, 0.1320825728246071, 0.05401810338709413, 0.020988203134507902, -0.1425022468939724, -0.11590226167332261, -0.056083131470762555, 0.06797285373472879, 0.09555351052005144, 0.08525925965401374, 0.1627404162277197, -0.09193201102278827, -0.04782921058170858, 0.4006968116267554, -0.06249448232554113, -0.14159572301028792, 0.17875109553607482, -0.2565674170506217, -0.12023696967686016, 0.10104044761148191, 0.15837407916513901, 0.17942963752354826, -0.14826744518453075, -0.00773422178463079, 0.07103060817556275, 0.2095374365697705, 0.12067119888735996, 0.009207450172095465, 0.3492009629825911, 0.14888658822183648, -0.03439835451483246, 0.1237720015445619, -0.19394379008689053, -0.07282384935129929, -0.2306100953813462, -0.036514479141201706, -0.12303626634210589, 0.06969745241616282, -0.17853376435678295, -0.16780342454712222, 0.2754541212963241, 0.09451683615184119, 0.17491574047110794, -0.004152023110486147, 0.29443141965631153, 0.09983535488267549, 0.05650840333527735, 0.07261833091146283, 0.34246964958466347, 0.17686420559297286, 0.023386440179761377, -0.2745805678423494, 0.07910977106826801, 0.006272438504252463] |
709.259 | The Riemann Zeta-Function and Hecke Congruence Subgroups. II | This is a rework of our old file, which has been left unpublished since
September 1994, on an explicit spectral decomposition of the fourth power
moment of the Riemann zeta-function against a weight which is the square of a
Dirichlet polynomial. At this occasion we add an explicit treatment of
generalized Kloosterman sums associated with arbitrary Hecke congruence
subgroups (Section 15), which might have an independent interest. At the end
(Section 36) of our discussion, we set out a few problems on the distribution
of eigenvalues of the hyperbolic Laplacian, which appear to us to be related to
the nature of the sixth power moment of the Riemann zeta-function. The contents
of this work were presented in a worshop at RIMS Kyoto University on October
18, 2007.
In this second version, some corrections are made in the part on generalized
Kloosterman sums, and in Addendum a mention is made concerning a recent work by
C.P. Hughes and M.P. Young (0709.2345).
| math.NT | this is a rework of our old file which has been left unpublished since september 1994 on an explicit spectral decomposition of the fourth power moment of the riemann zetafunction against a weight which is the square of a dirichlet polynomial at this occasion we add an explicit treatment of generalized kloosterman sums associated with arbitrary hecke congruence subgroups section 15 which might have an independent interest at the end section 36 of our discussion we set out a few problems on the distribution of eigenvalues of the hyperbolic laplacian which appear to us to be related to the nature of the sixth power moment of the riemann zetafunction the contents of this work were presented in a worshop at rims kyoto university on october 18 2007 in this second version some corrections are made in the part on generalized kloosterman sums and in addendum a mention is made concerning a recent work by cp hughes and mp young 07092345 | [['this', 'is', 'a', 'rework', 'of', 'our', 'old', 'file', 'which', 'has', 'been', 'left', 'unpublished', 'since', 'september', '1994', 'on', 'an', 'explicit', 'spectral', 'decomposition', 'of', 'the', 'fourth', 'power', 'moment', 'of', 'the', 'riemann', 'zetafunction', 'against', 'a', 'weight', 'which', 'is', 'the', 'square', 'of', 'a', 'dirichlet', 'polynomial', 'at', 'this', 'occasion', 'we', 'add', 'an', 'explicit', 'treatment', 'of', 'generalized', 'kloosterman', 'sums', 'associated', 'with', 'arbitrary', 'hecke', 'congruence', 'subgroups', 'section', '15', 'which', 'might', 'have', 'an', 'independent', 'interest', 'at', 'the', 'end', 'section', '36', 'of', 'our', 'discussion', 'we', 'set', 'out', 'a', 'few', 'problems', 'on', 'the', 'distribution', 'of', 'eigenvalues', 'of', 'the', 'hyperbolic', 'laplacian', 'which', 'appear', 'to', 'us', 'to', 'be', 'related', 'to', 'the', 'nature', 'of', 'the', 'sixth', 'power', 'moment', 'of', 'the', 'riemann', 'zetafunction', 'the', 'contents', 'of', 'this', 'work', 'were', 'presented', 'in', 'a', 'worshop', 'at', 'rims', 'kyoto', 'university', 'on', 'october', '18', '2007', 'in', 'this', 'second', 'version', 'some', 'corrections', 'are', 'made', 'in', 'the', 'part', 'on', 'generalized', 'kloosterman', 'sums', 'and', 'in', 'addendum', 'a', 'mention', 'is', 'made', 'concerning', 'a', 'recent', 'work', 'by', 'cp', 'hughes', 'and', 'mp', 'young', '07092345']] | [-0.1350564183301216, 0.05079026302312129, -0.11998329277343626, 0.03717167250762266, -0.11721623755710305, -0.07156742958398829, 0.03441151834617269, 0.2926312908237367, -0.23641798389876414, -0.29014723206454385, 0.14734625137475488, -0.2994547759412653, -0.10116254903504965, 0.18462710900806217, -0.10898066653852474, 0.02481516865345667, 0.05244207131579729, 0.06552423503976199, -0.05768982079407235, -0.3461016499958698, 0.321476065158352, 0.07226818191830607, 0.21037385310632112, 0.10247452268318373, 0.05605380196686623, -0.02285984345073314, -0.07816887124142838, -0.07647413480441151, -0.10870219108139006, 0.15704955380122945, 0.23407958190062278, 0.03757444413926316, 0.2726048328166933, -0.38532693106417526, -0.12416867016223054, 0.09080844754997477, 0.10203832915637044, 0.013091912485787985, -0.002850931937331861, -0.2811227435254896, 0.05822114823620368, -0.19904933889460918, -0.15757021566841212, -0.00880441011614957, 0.0549820924775218, 0.016484402788586257, -0.23347534676838033, 0.05326368449162106, 0.0777334384600055, 0.11116744505546097, -0.029128873498184875, -0.2017798475516995, 0.06292187851713092, 0.06445918848984084, 0.05842598613571967, 0.026961844922599832, 0.029019460579930986, -0.07112684995287431, -0.10449108705451747, 0.34410771172136395, -0.018913147361867083, -0.1609272882459486, 0.1201847984818683, -0.15690449279668572, -0.21100244905987064, 0.12825825828004558, 0.1654633885899664, 0.11771222542526212, -0.11812607898031297, 0.1251143874921221, -0.0992893336762516, 0.14708933235239824, 0.15676140558829754, -0.07443182321511349, 0.21327337631428578, 0.06301540336659495, 0.009228517823419153, 0.1363496088529732, -0.07508590453452249, -0.06976805032236771, -0.3419641467900771, -0.1762397745272742, -0.17481587003658777, 0.12172331402382855, -0.0532272770331291, -0.18761285442460632, 0.4248906552920458, 0.09599507480725036, 0.1748436422602701, 0.06294661905885961, 0.21625024309446272, 0.12567602645332338, 0.04479649478464194, 0.06430851263081971, 0.17962334882676653, 0.18908234290579487, 0.11144602636414223, -0.13741947444753996, 0.01913161121829378, 0.14251799195559708] |
709.2591 | Charged lepton distributions as a probe of contact e+e-HZ interactions
at a linear collider with polarized beams | We examine very general four-point interactions arising from new physics and
contributing to the Higgs production process e+e- -> HZ. We write all possible
forms for these interactions consistent with Lorentz invariance. We allow the
possibility of CP violation. Contributions to the process from anomalous ZZH
and gamma ZH interactions studied earlier arise as a special case of our
four-point amplitude. We consider the decay of Z into a charged lepton pair and
obtain expressions for angular distributions of charged leptons arising from
the interference of the four-point contribution with the standard-model
contribution. We take into account possible longitudinal or transverse beam
polarization likely to be available at a linear collider. We examine several
correlations which can be used to study the various form factors present in the
e+e-HZ contact interactions. We also obtain the sensitivity of these
correlations in constraining the new-physics interactions at a linear collider
operating at a centre-of-mass energy of 500 GeV with longitudinal or transverse
polarization.
| hep-ph hep-ex | we examine very general fourpoint interactions arising from new physics and contributing to the higgs production process ee hz we write all possible forms for these interactions consistent with lorentz invariance we allow the possibility of cp violation contributions to the process from anomalous zzh and gamma zh interactions studied earlier arise as a special case of our fourpoint amplitude we consider the decay of z into a charged lepton pair and obtain expressions for angular distributions of charged leptons arising from the interference of the fourpoint contribution with the standardmodel contribution we take into account possible longitudinal or transverse beam polarization likely to be available at a linear collider we examine several correlations which can be used to study the various form factors present in the eehz contact interactions we also obtain the sensitivity of these correlations in constraining the newphysics interactions at a linear collider operating at a centreofmass energy of 500 gev with longitudinal or transverse polarization | [['we', 'examine', 'very', 'general', 'fourpoint', 'interactions', 'arising', 'from', 'new', 'physics', 'and', 'contributing', 'to', 'the', 'higgs', 'production', 'process', 'ee', 'hz', 'we', 'write', 'all', 'possible', 'forms', 'for', 'these', 'interactions', 'consistent', 'with', 'lorentz', 'invariance', 'we', 'allow', 'the', 'possibility', 'of', 'cp', 'violation', 'contributions', 'to', 'the', 'process', 'from', 'anomalous', 'zzh', 'and', 'gamma', 'zh', 'interactions', 'studied', 'earlier', 'arise', 'as', 'a', 'special', 'case', 'of', 'our', 'fourpoint', 'amplitude', 'we', 'consider', 'the', 'decay', 'of', 'z', 'into', 'a', 'charged', 'lepton', 'pair', 'and', 'obtain', 'expressions', 'for', 'angular', 'distributions', 'of', 'charged', 'leptons', 'arising', 'from', 'the', 'interference', 'of', 'the', 'fourpoint', 'contribution', 'with', 'the', 'standardmodel', 'contribution', 'we', 'take', 'into', 'account', 'possible', 'longitudinal', 'or', 'transverse', 'beam', 'polarization', 'likely', 'to', 'be', 'available', 'at', 'a', 'linear', 'collider', 'we', 'examine', 'several', 'correlations', 'which', 'can', 'be', 'used', 'to', 'study', 'the', 'various', 'form', 'factors', 'present', 'in', 'the', 'eehz', 'contact', 'interactions', 'we', 'also', 'obtain', 'the', 'sensitivity', 'of', 'these', 'correlations', 'in', 'constraining', 'the', 'newphysics', 'interactions', 'at', 'a', 'linear', 'collider', 'operating', 'at', 'a', 'centreofmass', 'energy', 'of', '500', 'gev', 'with', 'longitudinal', 'or', 'transverse', 'polarization']] | [-0.1281496299387072, 0.20776736050029285, -0.059601898852633894, 0.14364357319220744, -0.07659583511558594, -0.14045356814167462, 0.004171097506696242, 0.3242748301789106, -0.25683126235671805, -0.2760310153011233, -0.01334231356449891, -0.326826946073561, -0.035567404216271824, 0.15237995146599131, 0.12732404835987837, 0.042876376764615996, 0.03893019709939836, -0.019546668870316353, -0.052645438077888684, -0.19401480977685423, 0.31479551576194353, 0.04580110039678402, 0.2223490651929751, 0.11419426112261136, 0.08109145261259983, 0.07072049036360113, -0.05586329454490624, -0.016770929767517373, -0.13377668322646058, 0.07331039917553425, 0.2211659306049114, 0.05672796960570849, 0.11840234160235923, -0.38722438461263664, -0.11579950324812671, 0.14672691941959784, 0.12855527285137214, 0.12308855155788478, -0.049186364446359224, -0.286555707208754, 0.016250208871497307, -0.21169636069098488, -0.13071630126796663, -0.07575825499807251, -0.026392641180427744, -0.05072139678086387, -0.33215480426733845, 0.12257134070659959, -0.0019679969147546215, 0.021673888173245358, -0.0011491770230350085, -0.1670879560399044, -0.02303900658080238, 0.07771207001933363, 0.13913821594505862, 0.01811473734123865, 0.1431787755296682, -0.1550955885235453, -0.16077453201287425, 0.3945313131902367, -0.08006540783826495, -0.18659420543917804, 0.18547876603615804, -0.23236374098050874, -0.1621311048977077, 0.13456538414829994, 0.29639288181788287, 0.04863052836608404, -0.2099573212210089, 0.11514537838120305, 0.03629879740765318, 0.10922654309397331, 0.0869131060091604, 0.08705208883802698, 0.2422842643718468, 0.1374964683142025, 0.006924935388087761, 0.1462156891109771, -0.11883260988543043, -0.023867070777487242, -0.41094658474903556, -0.11282398355542682, -0.05209627883523353, 0.11482274153677281, -0.05747500518018569, -0.0743025974923512, 0.4079500954525429, 0.12249728583237811, 0.23396242675662507, 0.04358675540643162, 0.26792415968957356, 0.10603790944514913, 0.10602998434951587, 0.02528880543595733, 0.3125076796044596, 0.14612124570121524, 0.10226348272699397, -0.23817272587766639, 0.013734376002685168, -0.005367052322253585] |
709.2592 | Seshadri fibrations of algebraic surfaces | We refine results of Hwang, Keum and Szemberg, Tutaj-Gasinska which relate
local invariants - Seshadri constants - of ample line bundles on surfaces to
the global geometry - fibration structure. We show that the same picture
emerges when looking at Seshadri constants measured at any finite subset of the
given surface.
| math.AG | we refine results of hwang keum and szemberg tutajgasinska which relate local invariants seshadri constants of ample line bundles on surfaces to the global geometry fibration structure we show that the same picture emerges when looking at seshadri constants measured at any finite subset of the given surface | [['we', 'refine', 'results', 'of', 'hwang', 'keum', 'and', 'szemberg', 'tutajgasinska', 'which', 'relate', 'local', 'invariants', 'seshadri', 'constants', 'of', 'ample', 'line', 'bundles', 'on', 'surfaces', 'to', 'the', 'global', 'geometry', 'fibration', 'structure', 'we', 'show', 'that', 'the', 'same', 'picture', 'emerges', 'when', 'looking', 'at', 'seshadri', 'constants', 'measured', 'at', 'any', 'finite', 'subset', 'of', 'the', 'given', 'surface']] | [-0.20482710492797196, 0.0408117782244517, -0.09387591250318413, 0.08732666071349134, -0.10918548928263287, -0.18252171661394337, 0.08086499960336369, 0.3461735477127756, -0.2938499742692026, -0.20569958863537371, 0.0506060800786751, -0.2671279441177224, -0.13941410835832357, 0.1944983884653387, -0.09866747457999736, -0.017406213485325377, 0.005050110873222972, 0.025853871008924518, -0.10664263338063999, -0.2975291088174951, 0.40266394390103716, 0.02999697848766421, 0.24840155228351554, 0.17172888382871557, 0.09100044782583912, 0.023676422570133582, -0.002780704254594942, -0.0021074011262195804, -0.25321675492235346, 0.14603875880129635, 0.24006560386624187, 0.05825866904342547, 0.10271042737197907, -0.37585307479215163, -0.16569891310064122, 0.11326890318499257, 0.07143225095933303, 0.06192835118417861, 0.04800193739599005, -0.2777847631174761, 0.11126714149334778, -0.026392877984714385, -0.2071386430761777, -0.08210032305214554, 0.04074942390434444, 0.0063357964681927115, -0.1950058036060606, -0.049713913390102484, 0.02442092801599453, 0.189017722470453, -0.11827858214383014, -0.11888610034172113, -0.11665858209986861, 0.08504256453610044, 0.04492389416554943, 0.0732732260269889, 0.13998861320821257, -0.07549071067478508, -0.08433680021941352, 0.3426179433105669, -0.11083036435593385, -0.17563808834044417, 0.11824618207659417, -0.1989913178307082, -0.1610754239372909, 0.14723602033821712, 0.08887207900018741, 0.18068494373195185, 0.03710414517960695, 0.1534248960609451, -0.12811361281880332, 0.1070230583815525, 0.13198032606548318, -0.04076407204653757, 0.13301448504595706, 0.038102368681090105, 0.051997411772996806, 0.021253196622031584, -0.009850625381659484, -0.028812059822181862, -0.3801446887664497, -0.20201068107659617, -0.10650235568755306, 0.16612361247340837, -0.1156749125702845, -0.11408526311182261, 0.3405953120770088, 0.017201769980601966, 0.2847483853499095, 0.117049491724174, 0.18233369504256794, 0.019198410426421713, 0.021206041681580245, 0.09084398734072845, 0.20560370777578404, 0.172432204708457, 0.0008145290873168657, -0.16179830910793194, 0.028482201906930033, 0.22053702303674072] |
709.2593 | Symmetric identities on Bernoulli polynomials | In this paper, we obtain a generalization of an identity due to Carlitz on
Bernoulli polynomials. Then we use this generalized formula to derive two
symmetric identities which reduce to some known identities on Bernoulli
polynomials and Bernoulli numbers, including the Miki identity.
| math.NT math.CO | in this paper we obtain a generalization of an identity due to carlitz on bernoulli polynomials then we use this generalized formula to derive two symmetric identities which reduce to some known identities on bernoulli polynomials and bernoulli numbers including the miki identity | [['in', 'this', 'paper', 'we', 'obtain', 'a', 'generalization', 'of', 'an', 'identity', 'due', 'to', 'carlitz', 'on', 'bernoulli', 'polynomials', 'then', 'we', 'use', 'this', 'generalized', 'formula', 'to', 'derive', 'two', 'symmetric', 'identities', 'which', 'reduce', 'to', 'some', 'known', 'identities', 'on', 'bernoulli', 'polynomials', 'and', 'bernoulli', 'numbers', 'including', 'the', 'miki', 'identity']] | [-0.13694519961122856, 0.07134039127464178, -0.08108874133159948, 0.07794714519255903, -0.15847363465920436, -0.16692289323437698, 0.07847450160540553, 0.23734771209054215, -0.33867347352531585, -0.21774390142757533, 0.12005752921483458, -0.22053047332392875, -0.25308898645778033, 0.21018364961085798, -0.17223918730349735, -0.008199048585929843, -0.04082480191556347, 0.07703145043274691, -0.11362920088563548, -0.3167837142083404, 0.36329481588286716, -0.021807323808261996, 0.20302186464500982, 0.050867782862380494, 0.13962028152850825, -0.000929683479372152, -0.09763091687806123, -0.105975259441969, -0.16508778494371232, 0.1206163092689632, 0.19450330140805522, 0.09804403149457865, 0.2233764790864878, -0.36616191653491453, -0.0404483356058251, 0.2150074422906348, 0.1514771047026612, 0.06389925725010852, -0.027777128490121213, -0.28673318093426003, 0.06333407512757668, -0.25579881096302076, -0.2047278602109399, -0.11276853426771108, 0.0020329313092800074, 0.1247088564126644, -0.34413239175757004, 0.04634696769333163, 0.06866566328938271, 0.058488188811299004, -0.016483135142385266, -0.1762226891032485, 0.1162627600133419, 0.0716437966411197, 0.0615370504904625, -0.024501050530044838, -0.020166512632872478, -0.10145957857846867, -0.14584059390607615, 0.36171200386313507, 0.03264134881888018, -0.30618935355613397, 0.10298269051452015, -0.12029133018019587, -0.28664053435069187, 0.02906516926406428, 0.17752504054197046, 0.11871096060806235, -0.1324751824573722, 0.025598761970772908, -0.1632416343619657, 0.04148110336634915, 0.22640514397603828, 0.005760113015597643, 0.05692849013694497, -0.13247919650098613, 0.016312349609337574, 0.2828260426041345, -0.008145290405251259, -0.09395220728461133, -0.2783487523191197, -0.1979984952093557, -0.1882211314730866, 0.14394992126455142, -0.14496440387318765, -0.2061075364174538, 0.3445480730124684, 0.16381756172970283, 0.15066822325854107, 0.18728040161185228, 0.2431422597187203, 0.18628887405489072, 0.06407942954277576, 0.0036905301778122437, 0.015200524691757637, 0.29390308091980083, 0.10124748834777017, -0.07082956217413465, 0.034023946508505314, 0.25984602529815465] |
709.2594 | Possible crossover from BCS superconductivity to Bose-Einstein
condensate in quark matter | The possibility of the crossover from the BCS pairing to the Bose-Einstein
condensate (BEC) of diquarks with going down in density is discussed in the
framework of in the Nambu Jona-Lasinio (NJL) model. We find that the quark
matter at moderate density may be close to the intermediate of the crossover,
the precursory regime to the BEC phase.
| hep-ph | the possibility of the crossover from the bcs pairing to the boseeinstein condensate bec of diquarks with going down in density is discussed in the framework of in the nambu jonalasinio njl model we find that the quark matter at moderate density may be close to the intermediate of the crossover the precursory regime to the bec phase | [['the', 'possibility', 'of', 'the', 'crossover', 'from', 'the', 'bcs', 'pairing', 'to', 'the', 'boseeinstein', 'condensate', 'bec', 'of', 'diquarks', 'with', 'going', 'down', 'in', 'density', 'is', 'discussed', 'in', 'the', 'framework', 'of', 'in', 'the', 'nambu', 'jonalasinio', 'njl', 'model', 'we', 'find', 'that', 'the', 'quark', 'matter', 'at', 'moderate', 'density', 'may', 'be', 'close', 'to', 'the', 'intermediate', 'of', 'the', 'crossover', 'the', 'precursory', 'regime', 'to', 'the', 'bec', 'phase']] | [-0.11768691537195239, 0.2746081591005726, -0.1515737997191348, 0.11593833111491504, 0.00611147923587725, -0.142121191361341, 0.10380174447621765, 0.2778902169445465, -0.22139592253570928, -0.21421936062839012, -0.04093649965542336, -0.28156452932684073, -0.05009854617046899, 0.04462976826370919, 0.07515237628530454, 0.021267434598171507, -0.07630312259726484, 0.07114571956757071, -0.14108521747804278, -0.24135474451207395, 0.3817715380051783, -0.007233361263984236, 0.2950116016356082, 0.1276605797445819, 0.0067587965569491015, -0.04717923383678085, 0.10594136822679691, -0.06687138929706195, -0.13437931612598136, -0.027575957171362023, 0.24955019933986478, -0.03164063159633299, 0.19350746299686103, -0.3911136597202256, -0.22810500182195342, 0.08981976671754544, 0.19136319681199204, 0.22121632114406034, 0.010586733062719476, -0.36954235182753925, 0.02940138320213762, -0.238952172309931, -0.16820596523004874, -0.07174008594954322, -0.014247890618019577, -0.002436875975851355, -0.2645998316945444, 0.1443340398114303, 0.023126436268974995, -0.0014211094360156305, -0.06059939098737106, -0.11459801341246428, -0.014080553965899965, 0.00033502820236929533, 0.07819817678657649, 0.10303299047919953, 0.11982372323661272, -0.24158685535577865, 0.010785090158982524, 0.4063224986452481, -0.12160358151043604, -0.05475746706963099, 0.1662797774669939, -0.1829906147904694, -0.05539521713869582, 0.13566330255105577, 0.13925549342971424, 0.019556226762782396, -0.12294492613652656, 0.08276570044008308, -0.06539739089102709, 0.13953000978277674, 0.032011562107323574, 0.012565554063446048, 0.3401144717595187, 0.2492206031135444, -0.05259539082582141, 0.15945587843327366, -0.1091748065604218, -0.20369890927144424, -0.35508800126965445, -0.08314762461994743, -0.1762805574991066, -0.05498089235083296, -0.0759792292073112, -0.12316435092160928, 0.3736056249652957, 0.181244491047531, 0.21769549395760585, 0.004507469029390606, 0.23173425703084674, 0.13270440415061754, 0.05888268528185014, 0.051693480895382574, 0.319760017980147, 0.19500954062196202, 0.15066033213174548, -0.3327576295063221, -0.05991526913090513, 0.06460507896905444] |
709.2595 | H-atom bombardment of CO2, HCOOH and CH3CHO containing ices | Context: Hydrogenation reactions are expected to be among the most important
surface reactions on interstellar ices. However, solid state astrochemical
laboratory data on reactions of H-atoms with common interstellar ice
constituents are largely lacking. Aims: The goal of our laboratory work is to
determine whether and how carbon dioxide (CO2), formic acid (HCOOH) and
acetaldehyde (CH3CHO) react with H-atoms in the solid state at low temperatures
and to derive reaction rates and production yields. Methods: Pure CO2, HCOOH
and CH3CHO interstellar ice analogues are bombarded by H-atoms in an ultra-high
vacuum experiment. The ices are monitored by reflection absorption infrared
spectroscopy and the reaction products are detected in the gas phase through
temperature programmed desorption to determine the destruction and formation
yields as well as the corresponding reaction rates. Results: Within the
sensitivity of our set-up we conclude that H-atom bombardment of pure CO2 and
HCOOH ice does not result in detectable reaction products. The upper limits on
the reaction rates are less or equal to 7e(-17) cm^2/s which make it unlikely
that these species play a major role in the formation of more complex organics
in interstellar ices due to reactions with H-atoms. In contrast, CH3CHO does
react with H-atoms. At most 20% is hydrogenated to ethanol (C2H5OH) and a
second reaction route leads to the break-up of the C-C bond to form solid state
CH4 (~20%) as well as H2CO and CH3OH (15-50%). The methane production yield is
expected to be equal to the summed yield of H2CO and CH3OH and therefore CH4
most likely evaporates partly after formation due to the high exothermicity of
the reaction. The reaction rates for CH3CHO destruction depend on ice
temperature and not on ice thickness.
| astro-ph | context hydrogenation reactions are expected to be among the most important surface reactions on interstellar ices however solid state astrochemical laboratory data on reactions of hatoms with common interstellar ice constituents are largely lacking aims the goal of our laboratory work is to determine whether and how carbon dioxide co2 formic acid hcooh and acetaldehyde ch3cho react with hatoms in the solid state at low temperatures and to derive reaction rates and production yields methods pure co2 hcooh and ch3cho interstellar ice analogues are bombarded by hatoms in an ultrahigh vacuum experiment the ices are monitored by reflection absorption infrared spectroscopy and the reaction products are detected in the gas phase through temperature programmed desorption to determine the destruction and formation yields as well as the corresponding reaction rates results within the sensitivity of our setup we conclude that hatom bombardment of pure co2 and hcooh ice does not result in detectable reaction products the upper limits on the reaction rates are less or equal to 7e17 cm2s which make it unlikely that these species play a major role in the formation of more complex organics in interstellar ices due to reactions with hatoms in contrast ch3cho does react with hatoms at most 20 is hydrogenated to ethanol c2h5oh and a second reaction route leads to the breakup of the cc bond to form solid state ch4 20 as well as h2co and ch3oh 1550 the methane production yield is expected to be equal to the summed yield of h2co and ch3oh and therefore ch4 most likely evaporates partly after formation due to the high exothermicity of the reaction the reaction rates for ch3cho destruction depend on ice temperature and not on ice thickness | [['context', 'hydrogenation', 'reactions', 'are', 'expected', 'to', 'be', 'among', 'the', 'most', 'important', 'surface', 'reactions', 'on', 'interstellar', 'ices', 'however', 'solid', 'state', 'astrochemical', 'laboratory', 'data', 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'corresponding', 'reaction', 'rates', 'results', 'within', 'the', 'sensitivity', 'of', 'our', 'setup', 'we', 'conclude', 'that', 'hatom', 'bombardment', 'of', 'pure', 'co2', 'and', 'hcooh', 'ice', 'does', 'not', 'result', 'in', 'detectable', 'reaction', 'products', 'the', 'upper', 'limits', 'on', 'the', 'reaction', 'rates', 'are', 'less', 'or', 'equal', 'to', '7e17', 'cm2s', 'which', 'make', 'it', 'unlikely', 'that', 'these', 'species', 'play', 'a', 'major', 'role', 'in', 'the', 'formation', 'of', 'more', 'complex', 'organics', 'in', 'interstellar', 'ices', 'due', 'to', 'reactions', 'with', 'hatoms', 'in', 'contrast', 'ch3cho', 'does', 'react', 'with', 'hatoms', 'at', 'most', '20', 'is', 'hydrogenated', 'to', 'ethanol', 'c2h5oh', 'and', 'a', 'second', 'reaction', 'route', 'leads', 'to', 'the', 'breakup', 'of', 'the', 'cc', 'bond', 'to', 'form', 'solid', 'state', 'ch4', '20', 'as', 'well', 'as', 'h2co', 'and', 'ch3oh', '1550', 'the', 'methane', 'production', 'yield', 'is', 'expected', 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709.2596 | Chiral symmetry, Confinement and Nuclear Matter properties | We discuss the possible influence of fundamental QCD properties such as
spontaneous chiral symmetry breaking and nucleon substructure on nuclear matter
properties. We propose a chiral version of the relativistic $\sigma-\omega$
model in which the attractive background scalar field is associated with the
chiral invariant field governing the radial fluctuations of the quark
condensate. Nuclear matter stability is ensured once the scalar response of the
nucleon depending on the quark confinement mechanism is properly incorporated.
The needed parameters are estimated from lattice results and a satisfactory
description of bulk properties follows, the only really free parameter being
the $\omega NN$ coupling constant. Pion loops can be also incorporated to
obtain in a consistent way the finite density chiral susceptibilities. A good
description of the asymmetry energy is obtained once the full rho meson
exchange and Fock terms are included.
| nucl-th | we discuss the possible influence of fundamental qcd properties such as spontaneous chiral symmetry breaking and nucleon substructure on nuclear matter properties we propose a chiral version of the relativistic sigmaomega model in which the attractive background scalar field is associated with the chiral invariant field governing the radial fluctuations of the quark condensate nuclear matter stability is ensured once the scalar response of the nucleon depending on the quark confinement mechanism is properly incorporated the needed parameters are estimated from lattice results and a satisfactory description of bulk properties follows the only really free parameter being the omega nn coupling constant pion loops can be also incorporated to obtain in a consistent way the finite density chiral susceptibilities a good description of the asymmetry energy is obtained once the full rho meson exchange and fock terms are included | [['we', 'discuss', 'the', 'possible', 'influence', 'of', 'fundamental', 'qcd', 'properties', 'such', 'as', 'spontaneous', 'chiral', 'symmetry', 'breaking', 'and', 'nucleon', 'substructure', 'on', 'nuclear', 'matter', 'properties', 'we', 'propose', 'a', 'chiral', 'version', 'of', 'the', 'relativistic', 'sigmaomega', 'model', 'in', 'which', 'the', 'attractive', 'background', 'scalar', 'field', 'is', 'associated', 'with', 'the', 'chiral', 'invariant', 'field', 'governing', 'the', 'radial', 'fluctuations', 'of', 'the', 'quark', 'condensate', 'nuclear', 'matter', 'stability', 'is', 'ensured', 'once', 'the', 'scalar', 'response', 'of', 'the', 'nucleon', 'depending', 'on', 'the', 'quark', 'confinement', 'mechanism', 'is', 'properly', 'incorporated', 'the', 'needed', 'parameters', 'are', 'estimated', 'from', 'lattice', 'results', 'and', 'a', 'satisfactory', 'description', 'of', 'bulk', 'properties', 'follows', 'the', 'only', 'really', 'free', 'parameter', 'being', 'the', 'omega', 'nn', 'coupling', 'constant', 'pion', 'loops', 'can', 'be', 'also', 'incorporated', 'to', 'obtain', 'in', 'a', 'consistent', 'way', 'the', 'finite', 'density', 'chiral', 'susceptibilities', 'a', 'good', 'description', 'of', 'the', 'asymmetry', 'energy', 'is', 'obtained', 'once', 'the', 'full', 'rho', 'meson', 'exchange', 'and', 'fock', 'terms', 'are', 'included']] | [-0.13941829729316046, 0.24957991377015015, -0.12049608594041131, 0.1156425510412551, -0.09497264878516146, -0.08002271840898253, 0.009749188878499775, 0.3438668573181406, -0.20686777380945012, -0.23835142701864243, 0.012897929818228744, -0.26885361280024267, -0.061623772056840304, 0.06614163864099105, 0.06525084211846156, 0.06364019450617672, -0.0022487666712497634, 0.10153045061064496, -0.08019189676228013, -0.1809962442573562, 0.3233787567294437, 0.012940272643639566, 0.2532267373510831, 0.15047422841713903, 0.07297722911864198, 0.021213368701969656, 0.00193398653842817, 0.0075315420562736424, -0.1475640899173433, 0.06159407045799408, 0.16087665914963234, -0.007938129475621654, 0.13689534024422545, -0.4131825474432583, -0.21487663306711283, 0.08213225400356723, 0.1412916111377932, 0.13937544813898908, -0.059814574530267776, -0.27769028446335586, 0.07325995051433506, -0.20067964749504552, -0.19747110367786114, -0.14975182485110092, -0.030890632673709405, -0.013774340771299472, -0.29851750289793494, 0.12563599756455698, 0.003639116963679842, 0.01931838444668612, -0.07100172643214732, -0.16046465126288345, -0.07556129637569618, 0.07506390504217406, 0.09234193247397893, 0.08389820268866774, 0.2011051572592956, -0.2121830302970685, -0.061341544971700836, 0.4613043273792421, -0.07481198491220423, -0.18598388721697406, 0.09399905809529609, -0.14293856819649395, -0.09805325493752527, 0.10955189016024522, 0.14631805729402378, 0.07135963226876242, -0.16887592387690523, 0.13643178028739628, -0.0503628924765403, 0.19894794217334297, 0.04233440568523227, 0.08386990258456778, 0.24413804255640334, 0.1540492138282644, -0.00307799620795057, 0.09451418149656877, -0.02847100079114877, -0.12810046045928725, -0.4022920712453427, -0.07938485446540143, -0.1647322099746319, 0.050952107397665224, -0.1108838273460429, -0.1276377618326236, 0.42298120911494436, 0.08959850085993036, 0.2027777697482287, -0.03889370222807118, 0.292629040767633, 0.14132120832717113, 0.08745341142137006, 0.05616734519587468, 0.2799667876830204, 0.22891507256548288, 0.08307838865401719, -0.304720811922733, 0.00010475756352593144, 0.08119772167427453] |
709.2597 | Quantitative recurrence in two-dimensional extended processes | Under some mild condition, a random walk in the plane is recurrent. In
particular each trajectory is dense, and a natural question is how much time
one needs to approach a given small neighborhood of the origin. We address this
question in the case of some extended dynamical systems similar to planar
random walks, including $\ZZ^2$-extension of hyperbolic dynamics. We define a
pointwise recurrence rate and relate it to the dimension of the process, and
establish a convergence in distribution of the rescaled return times near the
origin.
| math.DS | under some mild condition a random walk in the plane is recurrent in particular each trajectory is dense and a natural question is how much time one needs to approach a given small neighborhood of the origin we address this question in the case of some extended dynamical systems similar to planar random walks including zz2extension of hyperbolic dynamics we define a pointwise recurrence rate and relate it to the dimension of the process and establish a convergence in distribution of the rescaled return times near the origin | [['under', 'some', 'mild', 'condition', 'a', 'random', 'walk', 'in', 'the', 'plane', 'is', 'recurrent', 'in', 'particular', 'each', 'trajectory', 'is', 'dense', 'and', 'a', 'natural', 'question', 'is', 'how', 'much', 'time', 'one', 'needs', 'to', 'approach', 'a', 'given', 'small', 'neighborhood', 'of', 'the', 'origin', 'we', 'address', 'this', 'question', 'in', 'the', 'case', 'of', 'some', 'extended', 'dynamical', 'systems', 'similar', 'to', 'planar', 'random', 'walks', 'including', 'zz2extension', 'of', 'hyperbolic', 'dynamics', 'we', 'define', 'a', 'pointwise', 'recurrence', 'rate', 'and', 'relate', 'it', 'to', 'the', 'dimension', 'of', 'the', 'process', 'and', 'establish', 'a', 'convergence', 'in', 'distribution', 'of', 'the', 'rescaled', 'return', 'times', 'near', 'the', 'origin']] | [-0.145290434371209, 0.11604939402220235, -0.09505590732241499, 0.10200759864907097, -0.04033172118274131, -0.11579892196794223, 0.06605540049508557, 0.3671913869550516, -0.31142762316198186, -0.1972259039530295, 0.1438080302075665, -0.24863219376781892, -0.1808892769990596, 0.16959924388933798, -0.10426396162559588, 0.06847498679918976, 0.04356028380450504, 0.09287560258553117, -0.04644083282000375, -0.26574867255263157, 0.30861762670222026, 0.022043016353814768, 0.23341178878520927, 0.029477803969900285, 0.10621145770392627, -0.00802248617869684, 0.008720191131378043, 0.007542021808096732, -0.14920982132912025, 0.07868647281530089, 0.15441651339910326, 0.11863603787871356, 0.3112424744437609, -0.39747438581938715, -0.20342239447409052, 0.1653318133462092, 0.13252342326149089, 0.08057848618890362, -0.024731258840310848, -0.25320577482832063, 0.11135288970223789, -0.07943548461631068, -0.2006165769443601, -0.0031179708031263075, 0.041416377268046485, 0.03710721721123347, -0.26359570679393995, 0.04936142873297306, 0.1239235549934353, 0.026203807261397784, -0.02836347196850626, -0.009516387203729701, 0.022961449854868067, 0.14731288737023313, 0.04924294382739202, 0.05416372293692039, 0.10296026584103532, -0.09392777271301153, -0.09686552398120878, 0.41035667970112855, -0.06094674071719891, -0.24657328255560207, 0.202377297112654, -0.21831098144563535, -0.1843775707222093, 0.10115402150061517, 0.20171686117376747, 0.13152862665104284, -0.16075019098432927, 0.10738485230296187, -0.0831852172897465, 0.10880494842455647, 0.07167385973507302, 0.026301481900201446, 0.16230682257413007, 0.1860960704815071, 0.11968318723548932, 0.16277573328336764, -0.04702950132496912, -0.13814394308746547, -0.2750097900580872, -0.15821152288953763, -0.17082305844129203, 0.10801907527613742, -0.13719195322265404, -0.18584498270660982, 0.4119653919733119, 0.1832722282336875, 0.27555140836335634, 0.08381508044288333, 0.23818515441594537, 0.14709441897247907, -0.007823254356439087, 0.09318563219523807, 0.13067969213435213, 0.13744634125467348, 0.08165773951673302, -0.16341905592908634, 0.08356804452601006, 0.10326689324373829] |
709.2598 | On the 3/4-Conjecture for Fix-Free Codes -- A Survey | In this survey we concern ourself with the question, wether there exists a
fix-free code for a given sequence of codeword lengths. For a given alphabet,
we obtain the {\em Kraftsum} of a code, if we divide for every length the
number of codewords of this length in the code by the total number of all
possible words of this length and then take summation over all codeword lengths
which appears in the code. The same way the Kraftsum of a lengths sequence
$(l_1,..., l_n) $ is given by $\sum_{i=1}^n q^{-l_i} $, where $q$ is the
numbers of letters in the alphabet. Kraft and McMillan have shown in
\cite{kraft} (1956), that there exists a prefix-free code with codeword lengths
of a certain lengths sequence, if the Kraftsum of the lengths sequence is
smaller than or equal to one. Furthermore they have shown, that the converse
also holds for all (uniquely decipherable) codes.\footnote{In this survey a
code means a set of words, such that any message which is encoded with these
words can be uniquely decoded. Therefore we omit in future the "uniquely
decipherable" and write only "code".} The question rises, if Kraft's and
McMillan's result can be generalized to other types of codes? Throughout, we
try to give an answer on this question for the class of fix-free codes. Since
any code has Kraftsum smaller than or equal to one, this answers the question
for the second implication of Kraft-McMillan's theorem. Therefore we pay
attention mainly to the first implication.
| cs.IT math.CO math.IT | in this survey we concern ourself with the question wether there exists a fixfree code for a given sequence of codeword lengths for a given alphabet we obtain the em kraftsum of a code if we divide for every length the number of codewords of this length in the code by the total number of all possible words of this length and then take summation over all codeword lengths which appears in the code the same way the kraftsum of a lengths sequence l_1 l_n is given by sum_i1n ql_i where q is the numbers of letters in the alphabet kraft and mcmillan have shown in citekraft 1956 that there exists a prefixfree code with codeword lengths of a certain lengths sequence if the kraftsum of the lengths sequence is smaller than or equal to one furthermore they have shown that the converse also holds for all uniquely decipherable codesfootnotein this survey a code means a set of words such that any message which is encoded with these words can be uniquely decoded therefore we omit in future the uniquely decipherable and write only code the question rises if krafts and mcmillans result can be generalized to other types of codes throughout we try to give an answer on this question for the class of fixfree codes since any code has kraftsum smaller than or equal to one this answers the question for the second implication of kraftmcmillans theorem therefore we pay attention mainly to the first implication | [['in', 'this', 'survey', 'we', 'concern', 'ourself', 'with', 'the', 'question', 'wether', 'there', 'exists', 'a', 'fixfree', 'code', 'for', 'a', 'given', 'sequence', 'of', 'codeword', 'lengths', 'for', 'a', 'given', 'alphabet', 'we', 'obtain', 'the', 'em', 'kraftsum', 'of', 'a', 'code', 'if', 'we', 'divide', 'for', 'every', 'length', 'the', 'number', 'of', 'codewords', 'of', 'this', 'length', 'in', 'the', 'code', 'by', 'the', 'total', 'number', 'of', 'all', 'possible', 'words', 'of', 'this', 'length', 'and', 'then', 'take', 'summation', 'over', 'all', 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709.2599 | Rapidity Variation of Thermal Parameters at SPS and RHIC | The rapidity dependence of the chemical freeze-out thermal parameters $T$ and
$\mu_B$ are determined at the highest RHIC and SPS energies.
These show a systematic behavior towards an increase in $\mu_B$ away from
mid-rapidity and a corresponding decrease in the temperature $T$.
| hep-ph | the rapidity dependence of the chemical freezeout thermal parameters t and mu_b are determined at the highest rhic and sps energies these show a systematic behavior towards an increase in mu_b away from midrapidity and a corresponding decrease in the temperature t | [['the', 'rapidity', 'dependence', 'of', 'the', 'chemical', 'freezeout', 'thermal', 'parameters', 't', 'and', 'mu_b', 'are', 'determined', 'at', 'the', 'highest', 'rhic', 'and', 'sps', 'energies', 'these', 'show', 'a', 'systematic', 'behavior', 'towards', 'an', 'increase', 'in', 'mu_b', 'away', 'from', 'midrapidity', 'and', 'a', 'corresponding', 'decrease', 'in', 'the', 'temperature', 't']] | [-0.03440138317334155, 0.2793024811852818, -0.15509805708591426, 0.03379295830659214, 0.04095886815117583, -0.057924481707492044, 0.0649041130784012, 0.3584196565761453, -0.28752240284700836, -0.2995001541539317, -0.07766313436773739, -0.40085597558035735, 0.13518309974599452, 0.13676270975598268, 0.06951563432964274, -0.007910142131593256, 0.02829857895128606, 0.05533648771233857, -0.15100522028903166, -0.18577937544545248, 0.2200190787857753, 0.13909531484491058, 0.2220951910352423, 0.2266028700202393, 0.03214840939091075, -0.030659905923086973, 0.030457990393707796, 0.04862092170376508, -0.19844881839872824, -0.03449112620382082, 0.2726072249934077, -0.06571566496443536, 0.16608065941060582, -0.2965914684214762, -0.16013766846819116, 0.11419226142710873, 0.09138478845402244, 0.0943822344055488, -0.08491916133234986, -0.18163546245722545, 0.09496121512105067, -0.1500581518658215, -0.19737635168989764, -0.022521022840269973, 0.05161240335465187, 0.0574542142484071, -0.282948949596002, 0.17204829159059695, -0.028790465312167293, 0.1690421233485852, -0.05868139389591912, -0.3079405855387449, -0.1587136883421668, 0.04308659040058652, 0.061612616603573166, 0.1539496693848854, 0.21979355736679973, -0.14313992590870753, -0.04188430451211475, 0.32299293484538794, -0.016058643503735464, -0.03499789929801842, 0.14294671872630715, -0.23733062793811163, -0.14136130387140883, 0.20049744041725284, 0.17018669976719789, 0.1245508779705103, -0.19514058982687338, 0.06996767202508636, 0.09798310914387305, 0.1496506912711387, 0.10958003626382422, 0.028040205948941764, 0.2486251617914864, 0.18109849075387632, 0.04947870752463738, 0.08757459436587635, -0.09487233743337649, -0.077449874154159, -0.3823336934936898, -0.09580015639464061, -0.13421175779686087, 0.0379324635224683, -0.14446469987195174, -0.05528388893002384, 0.3642367883807137, 0.16250591747285353, 0.36727579142011346, 0.027619463923786367, 0.2547560039730299, 0.12121846276291069, 0.05176042586875459, 0.12277202325917426, 0.23215500493755653, 0.14718388448957176, 0.291561952659062, -0.35741654780715526, 0.06113115417593647, 0.0032590648070687338] |
709.26 | On uniform convergence in ergodic theorems for a class of skew product
transformations | Consider a class of skew product transformations consisting of an ergodic or
a periodic transformation on a probability space (M, B, m) in the base and a
semigroup of transformations on another probability space (W,F,P) in the fibre.
Under suitable mixing conditions for the fibre transformation, we show that the
properties ergodicity, weakly mixing, and strongly mixing are passed on from
the base transformation to the skew product (with respect to the product
measure). We derive ergodic theorems with respect to the skew product on the
product space. The main aim of this paper is to establish uniform convergence
with respect to the base variable for the series of ergodic averages of a
function F on the product of the two probability spaces along the orbits of
such a skew product. Assuming a certain growth condition for the coupling
function, a strong mixing condition on the fibre transformation, and continuity
andintegrability conditions for F, we prove uniform convergence in the base and
L^p(P)-convergence in the fibre. Under an equicontinuity assumption on F we
further show P-almost sure convergence in the fibre. Our work has an
application in information theory: It implies convergence of the averages of
functions on random fields restricted to parts of stair climbing patterns
defined by a direction.
| math.DS | consider a class of skew product transformations consisting of an ergodic or a periodic transformation on a probability space m b m in the base and a semigroup of transformations on another probability space wfp in the fibre under suitable mixing conditions for the fibre transformation we show that the properties ergodicity weakly mixing and strongly mixing are passed on from the base transformation to the skew product with respect to the product measure we derive ergodic theorems with respect to the skew product on the product space the main aim of this paper is to establish uniform convergence with respect to the base variable for the series of ergodic averages of a function f on the product of the two probability spaces along the orbits of such a skew product assuming a certain growth condition for the coupling function a strong mixing condition on the fibre transformation and continuity andintegrability conditions for f we prove uniform convergence in the base and lppconvergence in the fibre under an equicontinuity assumption on f we further show palmost sure convergence in the fibre our work has an application in information theory it implies convergence of the averages of functions on random fields restricted to parts of stair climbing patterns defined by a direction | [['consider', 'a', 'class', 'of', 'skew', 'product', 'transformations', 'consisting', 'of', 'an', 'ergodic', 'or', 'a', 'periodic', 'transformation', 'on', 'a', 'probability', 'space', 'm', 'b', 'm', 'in', 'the', 'base', 'and', 'a', 'semigroup', 'of', 'transformations', 'on', 'another', 'probability', 'space', 'wfp', 'in', 'the', 'fibre', 'under', 'suitable', 'mixing', 'conditions', 'for', 'the', 'fibre', 'transformation', 'we', 'show', 'that', 'the', 'properties', 'ergodicity', 'weakly', 'mixing', 'and', 'strongly', 'mixing', 'are', 'passed', 'on', 'from', 'the', 'base', 'transformation', 'to', 'the', 'skew', 'product', 'with', 'respect', 'to', 'the', 'product', 'measure', 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709.2601 | Star formation in M33: Spitzer photometry of discrete sources | Combining the relative vicinity of the Local Group spiral galaxy M33 with the
Spitzer images, we investigate the properties of infrared (IR) emission sites
and assess the reliability of the IR emission as a star formation tracer. The
mid- and far-IR emission of M33 was obtained from IRAC and MIPS images from the
Spitzer archive. We compared the photometric results for several samples of
three known types of discrete sources (HII regions, supernovae remnants and
planetary nebulae) with theoretical diagnostic diagrams, and derived the
spectral energy distribution (from 3.6 to 24 micron) of each type of object.
Moreover, we generated a catalogue of 24 micron sources and inferred their
nature from the observed and theoretical colours of the known type sources. We
estimated the star formation rate in M33 both globally and locally, from the IR
emission and from the Halpha emission line. The colours of the typical IR
emissions of HII regions, supernovae remnants and planetary nebulae are
continuous among the different samples, with overlapping regions in the
diagnostic diagrams. The comparison between the model results and the colours
of HII regions indicates a dusty envelope at relatively high temperatures ~600
K, and moderate extinction Av < 10. The 24 micron sources IR colours follow the
regions observationally defined by the three classes of known objects but the
majority of them represent HII regions. The derived total IR luminosity
function is in fact very similar to the HII luminosity function observed in the
Milky Way and in other late type spirals. Even though our completeness limit is
5x10^37 ergs s-1, in low density regions we are able to detect sources five
times fainter than this, corresponding to the faintest possible HII region.
[abridged]
| astro-ph | combining the relative vicinity of the local group spiral galaxy m33 with the spitzer images we investigate the properties of infrared ir emission sites and assess the reliability of the ir emission as a star formation tracer the mid and farir emission of m33 was obtained from irac and mips images from the spitzer archive we compared the photometric results for several samples of three known types of discrete sources hii regions supernovae remnants and planetary nebulae with theoretical diagnostic diagrams and derived the spectral energy distribution from 36 to 24 micron of each type of object moreover we generated a catalogue of 24 micron sources and inferred their nature from the observed and theoretical colours of the known type sources we estimated the star formation rate in m33 both globally and locally from the ir emission and from the halpha emission line the colours of the typical ir emissions of hii regions supernovae remnants and planetary nebulae are continuous among the different samples with overlapping regions in the diagnostic diagrams the comparison between the model results and the colours of hii regions indicates a dusty envelope at relatively high temperatures 600 k and moderate extinction av 10 the 24 micron sources ir colours follow the regions observationally defined by the three classes of known objects but the majority of them represent hii regions the derived total ir luminosity function is in fact very similar to the hii luminosity function observed in the milky way and in other late type spirals even though our completeness limit is 5x1037 ergs s1 in low density regions we are able to detect sources five times fainter than this corresponding to the faintest possible hii region abridged | [['combining', 'the', 'relative', 'vicinity', 'of', 'the', 'local', 'group', 'spiral', 'galaxy', 'm33', 'with', 'the', 'spitzer', 'images', 'we', 'investigate', 'the', 'properties', 'of', 'infrared', 'ir', 'emission', 'sites', 'and', 'assess', 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709.2602 | Forecasting Seismic Signatures of Stellar Magnetic Activity | For the Sun, a tight correlation between various activity measures and
oscillation frequencies is well documented. For other stars, we have abundant
data on magnetic activity and its changes but not yet on its seismic signature.
A prediction of the activity induced frequency changes in stars based on
scaling the solar relations is presented. This seismic signature of the
activity should be measurable in the data expected within few years.
| astro-ph | for the sun a tight correlation between various activity measures and oscillation frequencies is well documented for other stars we have abundant data on magnetic activity and its changes but not yet on its seismic signature a prediction of the activity induced frequency changes in stars based on scaling the solar relations is presented this seismic signature of the activity should be measurable in the data expected within few years | [['for', 'the', 'sun', 'a', 'tight', 'correlation', 'between', 'various', 'activity', 'measures', 'and', 'oscillation', 'frequencies', 'is', 'well', 'documented', 'for', 'other', 'stars', 'we', 'have', 'abundant', 'data', 'on', 'magnetic', 'activity', 'and', 'its', 'changes', 'but', 'not', 'yet', 'on', 'its', 'seismic', 'signature', 'a', 'prediction', 'of', 'the', 'activity', 'induced', 'frequency', 'changes', 'in', 'stars', 'based', 'on', 'scaling', 'the', 'solar', 'relations', 'is', 'presented', 'this', 'seismic', 'signature', 'of', 'the', 'activity', 'should', 'be', 'measurable', 'in', 'the', 'data', 'expected', 'within', 'few', 'years']] | [-0.12548948957784367, 0.16988506927820188, -0.058602840469393416, 0.14765704394750565, -0.08444120182788797, -0.019654646569064686, 0.08140528231992253, 0.4114546836486885, -0.21544785117730497, -0.34971560849142924, 0.14134987148655845, -0.3109431527554989, -0.14095851250791125, 0.26554179109100784, -0.06075089556896793, 0.00483288911137996, 0.0604425178175526, 0.11676630870039974, -0.04947414355618613, -0.1572697006964258, 0.2458577842584678, 0.08877542322235447, 0.2582299495448491, 0.03867834940818804, 0.020648970744306487, -0.10144308002532593, -0.07763444775981562, 0.0028291494585573674, -0.08377739848302944, 0.08013136611573697, 0.24734088287389439, 0.1693896154407412, 0.19516493562633905, -0.4245577681277479, -0.24782843214592765, 0.08281615848786064, 0.09968224324818169, 0.052548711114962184, -0.0784496636379377, -0.2594823395434235, 0.02773869266467435, -0.14748452374977725, -0.071614429580846, -0.038155446495927337, 0.11131387722312606, 0.024265927235995022, -0.24696035135670433, 0.10533872087419566, 0.039610891937211685, 0.18577193305162445, -0.10220793476681657, -0.06769143432777908, -0.04998029252081843, 0.18925456636186158, 0.08989201800764672, 0.044267896343288676, 0.15444800343497522, -0.07904715134562658, -0.07898132554837503, 0.3824251903221011, -0.10395432412624359, -0.12233143024412649, 0.2272737558964374, -0.24035921416112355, -0.17326303190950837, 0.07351437951438129, 0.19004111235429133, 0.08859006195728268, -0.1725249000542265, -0.023690721553949905, -0.010382076100047146, 0.18094524765121087, 0.03510578780634595, 0.0736551227979362, 0.2733494555577636, 0.20607351785791772, 0.03505325203295797, 0.041869426477933305, -0.16848283885379456, -0.019819234657500472, -0.23391136272943447, -0.05285946956636118, -0.16907829784655146, -0.003568782284647958, -0.08408212863931631, -0.1539467890081661, 0.456375017496092, 0.11453899735622275, 0.20173111257276366, 0.01116550574079156, 0.27664228696376086, 0.11033697165548802, 0.14830754868952292, 0.0689127947070769, 0.3274823581533773, 0.13313779588123517, 0.11614650979505053, -0.22380945500252503, 0.15216840828901956, -0.003862147858100278] |
709.2603 | Existence et equidistribution des matrices de denominateur n dans les
groupes unitaires et orthogonaux | We study some subsets of rational points in an algebraic groups defined by
open conditions on their projection in the finite adeles points. Using adelic
mixing we are able to prove an equidistribution's result for the projection of
these sets in the real points. As an application, we study the existence and
the repartition of rational unitary matrices having a given denominator. We
prove a local-global principle for this problem and the equirepartition of the
sets of denominator n-matrices when they are not empty. Then we study the more
complicated case of non simply-connected groups applying it to quadratic forms.
| math.NT | we study some subsets of rational points in an algebraic groups defined by open conditions on their projection in the finite adeles points using adelic mixing we are able to prove an equidistributions result for the projection of these sets in the real points as an application we study the existence and the repartition of rational unitary matrices having a given denominator we prove a localglobal principle for this problem and the equirepartition of the sets of denominator nmatrices when they are not empty then we study the more complicated case of non simplyconnected groups applying it to quadratic forms | [['we', 'study', 'some', 'subsets', 'of', 'rational', 'points', 'in', 'an', 'algebraic', 'groups', 'defined', 'by', 'open', 'conditions', 'on', 'their', 'projection', 'in', 'the', 'finite', 'adeles', 'points', 'using', 'adelic', 'mixing', 'we', 'are', 'able', 'to', 'prove', 'an', 'equidistributions', 'result', 'for', 'the', 'projection', 'of', 'these', 'sets', 'in', 'the', 'real', 'points', 'as', 'an', 'application', 'we', 'study', 'the', 'existence', 'and', 'the', 'repartition', 'of', 'rational', 'unitary', 'matrices', 'having', 'a', 'given', 'denominator', 'we', 'prove', 'a', 'localglobal', 'principle', 'for', 'this', 'problem', 'and', 'the', 'equirepartition', 'of', 'the', 'sets', 'of', 'denominator', 'nmatrices', 'when', 'they', 'are', 'not', 'empty', 'then', 'we', 'study', 'the', 'more', 'complicated', 'case', 'of', 'non', 'simplyconnected', 'groups', 'applying', 'it', 'to', 'quadratic', 'forms']] | [-0.17903816736652517, 0.06571294719979051, -0.10379687568172813, 0.08827070363491657, -0.04600567635847255, -0.08244052685797215, 0.06501944047864526, 0.3333502511866391, -0.3287684335745871, -0.1950215812632814, 0.12788240985595623, -0.26037686835974455, -0.1627567633986473, 0.21972626592265443, -0.11484948882833124, 0.020174885061569513, 0.017218137629097328, 0.06303414090536535, -0.10805789586273022, -0.3360921937040985, 0.40996474150568246, -0.0624361482745735, 0.19806478179059922, 0.03357135197613388, 0.09944578593131155, 0.02619327886030078, -0.0034232109715230763, 0.013393426449038088, -0.12525116360979155, 0.1115512803394813, 0.28954613658366724, 0.11701029306277633, 0.2533255125954747, -0.410646430067718, -0.11022696476895362, 0.2246001448808238, 0.12472436582669616, 0.06224378737621009, -0.03506314468992059, -0.275481933595147, 0.12178600452491083, -0.11698544247075915, -0.19366088587325067, -0.09727856348268688, 0.009955138568766415, 0.019321650688070804, -0.25852134129498155, -0.01640795525687281, 0.07811932059936226, 0.13494045540690422, -0.09779005099087953, -0.10596464468515478, 0.021534058640245348, 0.12166910575382645, 0.012296391795389354, -0.017739025133196265, 0.05352808120194823, -0.06865993516286835, -0.10530798378866166, 0.37606793131679295, -0.024283123039640486, -0.26622277388349175, 0.17590702864690683, -0.16297186460345983, -0.15822556875180452, 0.0745936349220574, 0.13838299765251577, 0.1443531475076452, -0.07216261529669282, 0.14981889644521287, -0.14360203057527543, 0.0753753757593222, 0.11424280793406069, -0.020741652483702636, 0.14184719423297792, 0.07394146608421578, 0.13125919599551708, 0.14764279514551162, 0.0017661346797831357, -0.05275272664381191, -0.3496402793750167, -0.18177054786588998, -0.1679865403380245, 0.09322283813395188, -0.10248795926541789, -0.21136799120809882, 0.382668687030673, 0.08211404420435428, 0.21861897324211896, 0.09078555333428084, 0.22026418182067573, 0.11967055358341895, 0.03557018032530323, 0.07839514557272195, 0.11097920038417214, 0.16121215738588945, -0.03642174164764583, -0.15409490449819713, -0.015091219851747155, 0.13307371231727302] |
709.2604 | Near-infrared spectroscopy of the very low mass companion to the hot DA
white dwarf PG1234+482 | We present a near-infrared spectrum of the hot ($T_{\rm eff}$ $\approx$
55,000 K) DA white dwarf PG 1234+482. We confirm that a very low mass companion
is responsible for the previously recognised infrared photometric excess. We
compare spectra of M and L dwarfs, combined with an appropriate white dwarf
model, to the data to constrain the spectral type of the secondary. We find
that uncertainties in the 2MASS $HK$ photometry of the white dwarf prevent us
from distinguishing whether the secondary is stellar or substellar, and assign
a spectral type of L0$\pm$1 (M9-L1).Therefore, this is the hottest and youngest
($\approx 10^6$ yr) DA white dwarf with a possible brown dwarf companion.
| astro-ph | we present a nearinfrared spectrum of the hot t_rm eff approx 55000 k da white dwarf pg 1234482 we confirm that a very low mass companion is responsible for the previously recognised infrared photometric excess we compare spectra of m and l dwarfs combined with an appropriate white dwarf model to the data to constrain the spectral type of the secondary we find that uncertainties in the 2mass hk photometry of the white dwarf prevent us from distinguishing whether the secondary is stellar or substellar and assign a spectral type of l0pm1 m9l1therefore this is the hottest and youngest approx 106 yr da white dwarf with a possible brown dwarf companion | [['we', 'present', 'a', 'nearinfrared', 'spectrum', 'of', 'the', 'hot', 't_rm', 'eff', 'approx', '55000', 'k', 'da', 'white', 'dwarf', 'pg', '1234482', 'we', 'confirm', 'that', 'a', 'very', 'low', 'mass', 'companion', 'is', 'responsible', 'for', 'the', 'previously', 'recognised', 'infrared', 'photometric', 'excess', 'we', 'compare', 'spectra', 'of', 'm', 'and', 'l', 'dwarfs', 'combined', 'with', 'an', 'appropriate', 'white', 'dwarf', 'model', 'to', 'the', 'data', 'to', 'constrain', 'the', 'spectral', 'type', 'of', 'the', 'secondary', 'we', 'find', 'that', 'uncertainties', 'in', 'the', '2mass', 'hk', 'photometry', 'of', 'the', 'white', 'dwarf', 'prevent', 'us', 'from', 'distinguishing', 'whether', 'the', 'secondary', 'is', 'stellar', 'or', 'substellar', 'and', 'assign', 'a', 'spectral', 'type', 'of', 'l0pm1', 'm9l1therefore', 'this', 'is', 'the', 'hottest', 'and', 'youngest', 'approx', '106', 'yr', 'da', 'white', 'dwarf', 'with', 'a', 'possible', 'brown', 'dwarf', 'companion']] | [-0.03937135748047796, 0.13790389677389478, -0.10422782529214467, 0.11463446079761963, -0.1795719412039034, -0.10841518818159346, 0.13003085537046125, 0.3544570675499185, -0.13014880466033463, -0.3496151714180424, 0.027656895098819707, -0.3306268777663785, -0.04280133450326199, 0.18189762586175842, -0.14684685039402987, -0.07339777769003478, 0.10830832104612556, -0.03848208376870456, -0.04654979571340071, -0.2690010860786532, 0.3085187417368784, 0.05558614834660181, 0.04258250157107358, -0.09671442649171998, 0.0183470535827197, -0.10227524043767955, -0.1302482079093655, -0.11690862930414302, -0.2213563501789866, -0.06033686694206187, 0.24210045645358386, 0.10811269582309588, 0.17449967878659395, -0.22655043034400377, -0.2430861240179554, 0.08634953343318086, 0.1668227800961446, -0.05419204177559112, -0.05723111315294065, -0.227311493208011, 0.16723282538926773, -0.21969384179209117, -0.16252561255047718, 0.06264972946330628, 0.078947013899408, 0.0019116068207141426, -0.2925463078836738, 0.12133460166363942, 0.10524876727895052, 0.09359720883097637, -0.16997131430199025, -0.170727153370131, -0.057632962302132336, 0.07500391500286276, -0.032958377962199005, 0.0748880369463694, 0.07460496488514494, -0.0866923905646049, 0.03455372877350008, 0.39208487516346696, -0.18542795630680672, 0.07983525415140859, 0.2712038512496899, -0.15716164470305322, -0.14316888721401078, 0.12904560046822386, 0.10257381866513579, 0.15862636490190332, -0.21940971867836737, 0.028480723039710602, 0.0018722775426727753, 0.20092874586030288, 0.024621060385403258, 0.07457369190847708, 0.3695482467646124, 0.1303383302834441, 0.019991836519222015, 0.03176706417084292, -0.3315064595425846, 0.037933472836610034, -0.19040807755232822, -0.10363260479816408, -0.1681052995328274, 0.11489841363530744, -0.10534053836063659, -0.14628400197425098, 0.34427811953894516, 0.13190159330541198, 0.2593109891900827, -0.0016111696345938577, 0.3104637278140419, 0.09400123810667503, 0.08617455113886131, 0.15036368403687245, 0.2622733788340594, 0.23368259183890014, 0.08887530470059977, -0.28866147090297156, -0.02421040050426705, -0.007703691315664737] |
709.2605 | Status of the second phase of the MAGIC telescope | The MAGIC 17m diameter Cherenkov telescope will be upgraded with a second
telescope with advanced photon detectors and ultra fast readout within the year
2007. The sensitivity of MAGIC-II, the two telescope system, will be improved
by a factor of 2. In addition the energy threshold will be reduced and the
energy and angular resolution will be improved. The design, status and expected
performance of MAGIC-II is presented here.
| astro-ph | the magic 17m diameter cherenkov telescope will be upgraded with a second telescope with advanced photon detectors and ultra fast readout within the year 2007 the sensitivity of magicii the two telescope system will be improved by a factor of 2 in addition the energy threshold will be reduced and the energy and angular resolution will be improved the design status and expected performance of magicii is presented here | [['the', 'magic', '17m', 'diameter', 'cherenkov', 'telescope', 'will', 'be', 'upgraded', 'with', 'a', 'second', 'telescope', 'with', 'advanced', 'photon', 'detectors', 'and', 'ultra', 'fast', 'readout', 'within', 'the', 'year', '2007', 'the', 'sensitivity', 'of', 'magicii', 'the', 'two', 'telescope', 'system', 'will', 'be', 'improved', 'by', 'a', 'factor', 'of', '2', 'in', 'addition', 'the', 'energy', 'threshold', 'will', 'be', 'reduced', 'and', 'the', 'energy', 'and', 'angular', 'resolution', 'will', 'be', 'improved', 'the', 'design', 'status', 'and', 'expected', 'performance', 'of', 'magicii', 'is', 'presented', 'here']] | [-0.08601599758274961, 0.21574828070520924, -0.060636447877555656, 0.03275632073527431, -0.05971863649893498, -0.11493602291802349, 0.0045339026339892025, 0.3963125027797144, -0.16108116310467754, -0.42844618883901747, 0.1869781196836139, -0.2861377950217845, -0.06503977118383931, 0.24949872266312223, -0.059178340407358344, 0.04157277493589166, 0.21034529986723827, -0.029711000530211175, -0.07627738267183304, -0.26352923687385477, 0.20823795275519724, 0.2837305092185304, 0.2363311223132347, 0.0402974554175592, 0.14990237931235004, -0.04356021272774408, -0.0537839884451334, 0.030374079807728962, -0.08369522779316142, 0.09569704139173246, 0.2783838097896913, 0.13908892913141113, 0.19792917825659548, -0.3804319429386785, -0.10310344435814497, 0.08185294306958499, 0.08629136043600738, -0.01915957500645216, -0.00011716756051865177, -0.32780501606833673, 0.05136000025052361, -0.23294595423815906, -0.21847377521107378, 0.03740350480960763, -0.033458692210631955, 0.0876500369184583, -0.21453082974514234, -0.04442807307898782, -0.03931385516256526, -0.01221707996244178, -0.016959320693074362, -0.15400696726536137, 0.0464036531250357, 0.08148169671387775, -0.09042188873770984, 0.05801551344979932, 0.10653362128262718, -0.13497479624398376, -0.07649012047635473, 0.29075871775115747, -0.0821543710704461, -0.08709024848497432, 0.10483420734712179, -0.19217449064245043, -0.1103079102906412, 0.18874082640083373, 0.21900767810048832, 0.06068160446981589, -0.18070351778516086, 0.06297667564459793, 0.0705520247068742, 0.2535864428981491, 0.08849055511687977, 0.09077500564086696, 0.20216637878489774, 0.2720569112486597, 0.13476822519863862, 0.10065037984421234, -0.2807337484875883, 0.05095828312746101, -0.3017528333525727, -0.20596645891234494, -0.17273973413081706, 0.09775938440040025, -0.02236844348785319, 0.011133863172237423, 0.40777893035092216, 0.09940328242500192, 0.08712372073120829, 0.0007911334826570491, 0.3277944051053213, 0.0815205467675907, 0.12182947314357843, 0.005775570920061158, 0.3738407891081727, 0.052961537442372544, 0.17104336028189762, -0.20940582179911502, -0.032933615728456905, 0.020438751597227394] |
709.2606 | $\ell^1$ penalty for ill-posed inverse problems | We tackle the problem of recovering an unknown signal observed in an
ill-posed inverse problem framework. More precisely, we study a procedure
commonly used in numerical analysis or image deblurring: minimizing an
empirical loss function balanced by an $l^1$ penalty, acting as a sparsity
constraint. We prove that, by choosing a proper loss function, this estimation
technique enables to build an adaptive estimator, in the sense that it
converges at the optimal rate of convergence without prior knowledge of the
regularity of the true solution
| math.ST stat.TH | we tackle the problem of recovering an unknown signal observed in an illposed inverse problem framework more precisely we study a procedure commonly used in numerical analysis or image deblurring minimizing an empirical loss function balanced by an l1 penalty acting as a sparsity constraint we prove that by choosing a proper loss function this estimation technique enables to build an adaptive estimator in the sense that it converges at the optimal rate of convergence without prior knowledge of the regularity of the true solution | [['we', 'tackle', 'the', 'problem', 'of', 'recovering', 'an', 'unknown', 'signal', 'observed', 'in', 'an', 'illposed', 'inverse', 'problem', 'framework', 'more', 'precisely', 'we', 'study', 'a', 'procedure', 'commonly', 'used', 'in', 'numerical', 'analysis', 'or', 'image', 'deblurring', 'minimizing', 'an', 'empirical', 'loss', 'function', 'balanced', 'by', 'an', 'l1', 'penalty', 'acting', 'as', 'a', 'sparsity', 'constraint', 'we', 'prove', 'that', 'by', 'choosing', 'a', 'proper', 'loss', 'function', 'this', 'estimation', 'technique', 'enables', 'to', 'build', 'an', 'adaptive', 'estimator', 'in', 'the', 'sense', 'that', 'it', 'converges', 'at', 'the', 'optimal', 'rate', 'of', 'convergence', 'without', 'prior', 'knowledge', 'of', 'the', 'regularity', 'of', 'the', 'true', 'solution']] | [-0.056333553630803876, -0.034752594458233727, -0.11023577372817432, 0.1070102495716556, -0.09823360483107321, -0.11378527222858632, 0.0439459861639668, 0.42722826047855267, -0.34468861947603086, -0.30609553373035264, 0.13905316975981216, -0.22917307151810212, -0.21082486616831053, 0.15311357713961865, -0.15949759510729242, 0.1446964873767951, 0.08715613990583841, 0.01811392631600885, -0.12430699665428084, -0.24150289037703154, 0.31895360604805106, 0.08315667334724874, 0.2866761757499155, -0.015990282781422137, 0.16181867739514394, 0.05988963726113605, -0.03611740844105096, -0.028808326191981048, -0.13566031079715365, 0.12472531580475761, 0.25076536130817495, 0.191085943917963, 0.4120343251427745, -0.3669672731638831, -0.21499740077073085, 0.15779580979553215, 0.15039128526387846, 0.07709606427096707, -0.07001205507532338, -0.23016488037126906, 0.09087533039205214, -0.12512914653429213, -0.11990163064397433, -0.06506048259051407, -0.06459938822423711, -0.034949644654989245, -0.41009646167649944, 0.09877027023364515, 0.10852678190259372, 0.03620214640875073, -0.11718053205267472, -0.07301119662383024, 0.06072141493615859, 0.10153590202441111, 0.07577885445207358, 0.08347656454836183, 0.09947173720335259, -0.1387526755905984, -0.08603793325806584, 0.31413866564193194, -0.07708382930277902, -0.28624384546762005, 0.10677459129296682, -0.04234451999723473, -0.08956234739846824, 0.13991747209254432, 0.1916346373858259, 0.17678630437482806, -0.18184927274637364, 0.06786921883330625, -0.06980477563817711, 0.1890368675429593, 0.0717511567300843, -0.006204480676473502, 0.08223486858255723, 0.19080307707190514, 0.22173312640584567, 0.1626917965929298, -0.09076257254928351, -0.010991355689132915, -0.2897363580325071, -0.10362607444472173, -0.2537962851936326, 0.016893018816378624, -0.13710748430560618, -0.18419116261031698, 0.31011465203893535, 0.1719833192141617, 0.20958025786368287, 0.07511652914314147, 0.3366679239798995, 0.1724756128140999, 0.005967480163363849, 0.09167193824096638, 0.19328960907809875, 0.09986003876992447, 0.04246039124315276, -0.24136808921911698, 0.09539153025869061, 0.09068051347892513] |
709.2607 | Curvature explosion in quotients and applications | We prove that the quotient space of a variationally complete group action is
a good Riemannian orbifold. The result is generalized to singular Riemannian
foliations without horizontal conjugate points.
| math.DG | we prove that the quotient space of a variationally complete group action is a good riemannian orbifold the result is generalized to singular riemannian foliations without horizontal conjugate points | [['we', 'prove', 'that', 'the', 'quotient', 'space', 'of', 'a', 'variationally', 'complete', 'group', 'action', 'is', 'a', 'good', 'riemannian', 'orbifold', 'the', 'result', 'is', 'generalized', 'to', 'singular', 'riemannian', 'foliations', 'without', 'horizontal', 'conjugate', 'points']] | [-0.232552797886832, 0.04080696175966797, -0.16145226738319315, 0.13536895608433105, -0.2080951864863264, -0.13598154353555933, -0.02029122238786056, 0.37696093166696615, -0.2813581303404323, -0.15073689567888604, 0.0864215568189734, -0.28464879034536666, -0.16243453099039093, 0.14468191345704012, -0.226394713695707, 0.04597341988621087, 0.15482817410395064, 0.12099534144689297, -0.19164704013583733, -0.2380596658230984, 0.5042291355544123, -0.031920453312742555, 0.2550945308958662, 0.0316059226491328, 0.20226551470314635, -0.03643133390116794, 0.04028152651956369, 0.03812053479988867, -0.11825391182255457, 0.06499868669900401, 0.2822709906332452, 0.0051788345826308015, 0.17355683704452782, -0.3320200855618921, -0.206593918333087, 0.28703453794828265, 0.12652488399682374, 0.0070873287923890966, 0.02173521776747858, -0.32079933660811394, 0.12303520353703663, -0.05209299665072869, -0.24217958093203348, -0.12801467903472227, -0.034036444387687693, -0.07660010097355678, -0.22870994712515125, -0.02733166120817949, 0.09707562487315514, 0.15386905453713803, -0.07183227341236739, -0.07356418494199371, -0.1354555711792461, 0.07113590948925964, -0.0092063267586817, 0.1740422306325415, 0.13066794448692737, 0.019079099312938493, -0.07823966433904295, 0.3578207810521768, -0.11509449844216478, -0.3529096709500099, 0.03637702345591167, -0.11339184977435346, -0.15656233925757737, 0.1308427432166605, 0.07643350470682671, 0.21547990831835517, -0.07536023919438493, 0.20106929306197782, -0.11825879444849902, 0.010505586220272657, 0.057967475743900085, -0.0926010941219484, 0.07643826604531757, 0.08897292622011797, 0.254860056178837, 0.1028777854838248, 0.023254674072537958, -0.09789800231248655, -0.3828285901710905, -0.24019619758272992, -0.1479312681817803, 0.20045778341591358, -0.20346301032936778, -0.21298415701964807, 0.3886642665602267, -0.062303800232194624, 0.19819336610942564, 0.12126177632860069, 0.24657575837497053, 0.04418179739652009, -0.0015808613649730024, 0.11969121595330794, 0.15770965307180224, 0.20208438306019225, -0.08338001197011306, -0.15102068707346916, -0.12863114224104533, 0.28969032747735235] |
709.2608 | On the topology of minimal orbits in complex flag manifolds | We compute the Euler-Poincar\'e characteristic of the homogeneous compact
manifolds that can be described as minimal orbits for the action of a real form
in a complex flag manifold.
| math.DG | we compute the eulerpoincare characteristic of the homogeneous compact manifolds that can be described as minimal orbits for the action of a real form in a complex flag manifold | [['we', 'compute', 'the', 'eulerpoincare', 'characteristic', 'of', 'the', 'homogeneous', 'compact', 'manifolds', 'that', 'can', 'be', 'described', 'as', 'minimal', 'orbits', 'for', 'the', 'action', 'of', 'a', 'real', 'form', 'in', 'a', 'complex', 'flag', 'manifold']] | [-0.2177485223088799, 0.07800688777632754, -0.10936342860604155, 0.10522301199621167, -0.1147655223592602, -0.08017472900321772, -0.09982294126831252, 0.3099808002629414, -0.2748302787156968, -0.19761763127713367, 0.12325213209260255, -0.178176525016797, -0.21467108896066403, 0.2572515738871077, -0.10417787377433531, -0.049225969175840247, 0.07054143059388573, 0.1396279412618806, -0.11001586534307692, -0.2412699608068014, 0.4807531075744793, -0.05724842761289971, 0.15688800375009404, 0.005479417998215248, 0.15586628957555212, -0.0537895734486138, 0.06485271601584451, 0.0866581011595654, -0.08747711566659212, 0.15211034636816073, 0.28239894060996074, 0.10027391919545059, 0.11942264442492662, -0.3892136614384322, -0.2262863651207038, 0.18482554610818624, 0.15154265185240015, 0.0409663876454378, 0.008537986444245124, -0.30385493885340364, 0.12770857467669353, -0.149181483634587, -0.24895786969312306, -0.13604726976361767, 0.05000780076430789, 0.016593219134314306, -0.23473700463514904, -0.0065137915441702155, 0.07536888212479394, 0.08288101713847497, -0.13650139642815137, -0.05143235209558544, -0.05155420200578097, 0.13515637908130884, -0.05936033965955521, 0.03689389902263366, 0.1558051560363122, -0.05747455236469877, -0.11070069354348655, 0.43433702274643143, -0.14751967967584215, -0.3263311789467417, 0.12378822870809457, -0.15322758231697411, -0.1162500874107254, 0.16268814557456765, 0.2116317835411635, 0.2017731512414998, -0.06652770364849732, 0.15105030149374968, -0.09176980501747337, 0.02369201247548235, 0.0691246719195925, -0.035655992153775073, 0.14888934013915472, 0.13818144595957008, 0.07881897498436015, 0.08261501470757328, -0.025712968653132176, -0.11077596767452257, -0.34586491512841194, -0.2697278977981929, -0.17201085889647746, 0.21123662554048772, -0.13439535534266253, -0.2085674293981544, 0.4248683680218227, -0.02836132507193191, 0.2432282634625404, 0.09643340152527752, 0.2245369710285088, 0.09986266739875206, 0.07343773993438688, 0.07012627643115561, 0.12200399207208178, 0.15909762051084947, -0.053793004746067116, -0.1674971398094605, -0.055210078167247365, 0.08832763342572184] |
709.2609 | Unifying thermodynamic and kinetic descriptions of single-molecule
processes: RNA unfolding under tension | We use mesoscopic non-equilibrium thermodynamics theory to describe RNA
unfolding under tension. The theory introduces reaction coordinates,
characterizing a continuum of states for each bond in the molecule. The
unfolding considered is so slow that one can assume local equilibrium in the
space of the reaction coordinates. In the quasi-stationary limit of high
sequential barriers, our theory yields the master equation of a recently
proposed sequential-step model. Non-linear switching kinetics is found between
open and closed states. Our theory unifies the thermodynamic and kinetic
descriptions and offers a systematic procedure to characterize the dynamics of
the unfolding process
| cond-mat.stat-mech cond-mat.soft | we use mesoscopic nonequilibrium thermodynamics theory to describe rna unfolding under tension the theory introduces reaction coordinates characterizing a continuum of states for each bond in the molecule the unfolding considered is so slow that one can assume local equilibrium in the space of the reaction coordinates in the quasistationary limit of high sequential barriers our theory yields the master equation of a recently proposed sequentialstep model nonlinear switching kinetics is found between open and closed states our theory unifies the thermodynamic and kinetic descriptions and offers a systematic procedure to characterize the dynamics of the unfolding process | [['we', 'use', 'mesoscopic', 'nonequilibrium', 'thermodynamics', 'theory', 'to', 'describe', 'rna', 'unfolding', 'under', 'tension', 'the', 'theory', 'introduces', 'reaction', 'coordinates', 'characterizing', 'a', 'continuum', 'of', 'states', 'for', 'each', 'bond', 'in', 'the', 'molecule', 'the', 'unfolding', 'considered', 'is', 'so', 'slow', 'that', 'one', 'can', 'assume', 'local', 'equilibrium', 'in', 'the', 'space', 'of', 'the', 'reaction', 'coordinates', 'in', 'the', 'quasistationary', 'limit', 'of', 'high', 'sequential', 'barriers', 'our', 'theory', 'yields', 'the', 'master', 'equation', 'of', 'a', 'recently', 'proposed', 'sequentialstep', 'model', 'nonlinear', 'switching', 'kinetics', 'is', 'found', 'between', 'open', 'and', 'closed', 'states', 'our', 'theory', 'unifies', 'the', 'thermodynamic', 'and', 'kinetic', 'descriptions', 'and', 'offers', 'a', 'systematic', 'procedure', 'to', 'characterize', 'the', 'dynamics', 'of', 'the', 'unfolding', 'process']] | [-0.11978068761527538, 0.1272243425230851, -0.14664181469298765, 0.07832253927712766, 0.005632793684442018, -0.12285019920601212, 0.06937434081199396, 0.2973823420626601, -0.30760104357044105, -0.23650421916516787, -0.022956631634835654, -0.23952416237443686, -0.15610984685475526, 0.12668780382655406, -0.0062698024737927105, 0.05179865620838305, 0.05353225255385041, 0.02346250940997576, -0.027524824511048568, -0.15228389321643973, 0.2786566056503156, 0.050894286838772985, 0.2968181311008857, 0.060383590232921745, 0.13654554398615182, 0.0021682058115364963, 0.02063835409383491, 0.010638486786887107, -0.1957091829892081, 0.12157495769542478, 0.24761847491116867, 0.08688280610943731, 0.2260755838768691, -0.47023999018921064, -0.26939645306370463, 0.038273556388376914, 0.11930626783683204, 0.18912181987897636, 0.0023024965717622858, -0.22780977371004746, 0.014084206649207884, -0.14128403092936143, -0.15615510388479098, -0.11672719366387609, 0.02697636133309492, 0.025807488056802257, -0.23559378991959637, 0.09479203537951425, 0.04647784121814616, 0.03691358639637834, -0.09736925785036124, -0.06322569394311339, -0.04773125892082594, 0.1120609403779903, 0.024831738911950767, 0.004368929502664653, 0.18379983795595536, -0.09198262810601478, -0.12088898558784084, 0.36952265317446176, -0.05408796632527998, -0.22894577723783777, 0.19454948473289685, -0.1195705536964167, -0.1938507569396926, 0.14882190565857076, 0.089694440268825, 0.13373271863158678, -0.21367690597958477, 0.13106822417436897, 0.03184945521799406, 0.1326667821339629, 0.06025230137333658, -0.023113537306138843, 0.16072044079912076, 0.21165504663721801, 0.05250072166246852, 0.1589289873924836, -0.06862508037041143, -0.23924025116469136, -0.3261814893309757, -0.15657894549886553, -0.14104752230803608, 0.0974125440842136, -0.06768120621698885, -0.19336853904131146, 0.37712170635398057, 0.10400250209879476, 0.16020512189140024, 0.025860003555750417, 0.24145152478373236, 0.12407352515381098, 0.006283790127556656, 0.040841552947369436, 0.23543777461787782, 0.17492058421917184, 0.07243143849449289, -0.27372477325303574, 0.08608653142894666, 0.08267556399241396] |
709.261 | Swinging and tumbling of elastic capsules in shear flow | The deformation of an elastic micro-capsule in an infinite shear flow is
studied numerically using a spectral method. The shape of the capsule and the
hydrodynamic flow field are expanded into smooth basis functions. Analytic
expressions for the derivative of the basis functions permit the evaluation of
elastic and hydrodynamic stresses and bending forces at specified grid points
in the membrane. Compared to methods employing a triangulation scheme, this
method has the advantage that the resulting capsule shapes are automatically
smooth, and few modes are needed to describe the deformation accurately.
Computations are performed for capsules both with spherical and ellipsoidal
unstressed reference shape. Results for small deformations of initially
spherical capsules coincide with analytic predictions. For initially
ellipsoidal capsules, recent approximative theories predict stable oscillations
of the tank-treading inclination angle, and a transition to tumbling at low
shear rate. Both phenomena have also been observed experimentally. Using our
numerical approach we could reproduce both the oscillations and the transition
to tumbling. The full phase diagram for varying shear rate and viscosity ratio
is explored. While the numerically obtained phase diagram qualitatively agrees
with the theory, intermittent behaviour could not be observed within our
simulation time. Our results suggest that initial tumbling motion is only
transient in this region of the phase diagram.
| cond-mat.soft | the deformation of an elastic microcapsule in an infinite shear flow is studied numerically using a spectral method the shape of the capsule and the hydrodynamic flow field are expanded into smooth basis functions analytic expressions for the derivative of the basis functions permit the evaluation of elastic and hydrodynamic stresses and bending forces at specified grid points in the membrane compared to methods employing a triangulation scheme this method has the advantage that the resulting capsule shapes are automatically smooth and few modes are needed to describe the deformation accurately computations are performed for capsules both with spherical and ellipsoidal unstressed reference shape results for small deformations of initially spherical capsules coincide with analytic predictions for initially ellipsoidal capsules recent approximative theories predict stable oscillations of the tanktreading inclination angle and a transition to tumbling at low shear rate both phenomena have also been observed experimentally using our numerical approach we could reproduce both the oscillations and the transition to tumbling the full phase diagram for varying shear rate and viscosity ratio is explored while the numerically obtained phase diagram qualitatively agrees with the theory intermittent behaviour could not be observed within our simulation time our results suggest that initial tumbling motion is only transient in this region of the phase diagram | [['the', 'deformation', 'of', 'an', 'elastic', 'microcapsule', 'in', 'an', 'infinite', 'shear', 'flow', 'is', 'studied', 'numerically', 'using', 'a', 'spectral', 'method', 'the', 'shape', 'of', 'the', 'capsule', 'and', 'the', 'hydrodynamic', 'flow', 'field', 'are', 'expanded', 'into', 'smooth', 'basis', 'functions', 'analytic', 'expressions', 'for', 'the', 'derivative', 'of', 'the', 'basis', 'functions', 'permit', 'the', 'evaluation', 'of', 'elastic', 'and', 'hydrodynamic', 'stresses', 'and', 'bending', 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709.2611 | Instabilities in two flavor quark matter | I discuss briefly the instabilities of two flavor quark matter, paying
attention to the gradient instability which develops in the g2SC phase in the
Goldstone $U(1)_A$ sector.
| hep-ph | i discuss briefly the instabilities of two flavor quark matter paying attention to the gradient instability which develops in the g2sc phase in the goldstone u1_a sector | [['i', 'discuss', 'briefly', 'the', 'instabilities', 'of', 'two', 'flavor', 'quark', 'matter', 'paying', 'attention', 'to', 'the', 'gradient', 'instability', 'which', 'develops', 'in', 'the', 'g2sc', 'phase', 'in', 'the', 'goldstone', 'u1_a', 'sector']] | [-0.20791592192836106, 0.3268132958975103, -0.0949126356108873, 0.1705088010057807, -0.12798996407676627, -0.09789564101784318, 0.036816803647929594, 0.2923594351719927, -0.2215377702895138, -0.15858170134877717, 0.12154069400599433, -0.24531386126936586, -0.09352169379040047, -0.039563457723017094, -0.010564895484734464, -0.004559366860323482, -0.09758587947322263, 0.015317074523341877, -0.09382322313333, -0.19426816101703379, 0.3400756449059204, -0.04134452384379175, 0.2944931770088496, 0.09876966980044488, -0.009476040489971638, -0.04550564263222946, -0.04636307336665966, -0.13608292082359116, -0.1185488277287395, -0.039055801928043365, 0.1774346414086823, 0.05128339874661631, 0.1816701458560096, -0.41953979984477713, -0.2098683965202697, 0.12140249188437506, 0.1508960152493307, 0.18412304581229197, -0.14580096587262772, -0.29519859042570545, -0.01746916952456727, -0.25874191812343067, -0.16540474242841205, -0.07621982831645895, -0.04504368190343181, -0.09047159207639871, -0.22888267495565945, 0.09734173395015576, 0.018891153995085647, 0.003258536673254437, 0.01653924303698457, -0.18861229766022275, -0.08857124567859703, -0.07609849188614774, 0.28353382281407163, 0.06343018580917958, 0.15138686394870834, -0.31024568729723495, -0.07302764979087645, 0.4680862007662654, -0.051445617306011694, -0.1474252538755536, 0.10008693669267275, -0.16708459965539751, -0.19464027847128887, 0.07628485757029718, 0.1846545570426517, 0.022429027887820092, -0.10404489353230154, 0.13046436979331905, 0.05149174647198783, 0.07373988434361915, 0.05367074617081218, 0.0367733922407583, 0.312156878825691, 0.2173745211696735, 0.0033529315109330194, 0.14531260038967486, -0.0542683026029004, -0.1918663122104826, -0.40364255673355526, -0.08544339743201379, -0.02768904129388156, -0.050556863399429455, -0.052458741805619664, -0.11673602648079395, 0.47474559479289585, 0.1957220777780835, 0.20106985130243832, -0.08875231641017038, 0.26040639562739265, 0.05395742374713774, 0.04549086880352762, 0.10394516563111986, 0.3694395272544137, 0.19637741327837663, 0.20176129767464268, -0.3851247126305545, -0.11707927564297009, 0.15299040803478825] |
709.2612 | On the approach to equilibrium for a polymer with adsorption and
repulsion | We consider paths of a one-dimensional simple random walk conditioned to come
back to the origin after L steps (L an even integer). In the 'pinning model'
each path \eta has a weight \lambda^{N(\eta)}, where \lambda>0 and N(\eta) is
the number of zeros in \eta. When the paths are constrained to be non-negative,
the polymer is said to satisfy a hard-wall constraint. Such models are well
known to undergo a localization/delocalization transition as the pinning
strength \lambda is varied. In this paper we study a natural 'spin flip'
dynamics for these models and derive several estimates on its spectral gap and
mixing time. In particular, for the system with the wall we prove that
relaxation to equilibrium is always at least as fast as in the free case
(\lambda=1, no wall), where the gap and the mixing time are known to scale as
L^{-2} and L^2\log L, respectively. This improves considerably over previously
known results. For the system without the wall we show that the equilibrium
phase transition has a clear dynamical manifestation: for \lambda \geq 1 the
relaxation is again at least as fast as the diffusive free case, but in the
strictly delocalized phase (\lambda < 1) the gap is shown to be O(L^{-5/2}), up
to logarithmic corrections. As an application of our bounds, we prove stretched
exponential relaxation of local functions in the localized regime.
| math.PR math-ph math.MP | we consider paths of a onedimensional simple random walk conditioned to come back to the origin after l steps l an even integer in the pinning model each path eta has a weight lambdaneta where lambda0 and neta is the number of zeros in eta when the paths are constrained to be nonnegative the polymer is said to satisfy a hardwall constraint such models are well known to undergo a localizationdelocalization transition as the pinning strength lambda is varied in this paper we study a natural spin flip dynamics for these models and derive several estimates on its spectral gap and mixing time in particular for the system with the wall we prove that relaxation to equilibrium is always at least as fast as in the free case lambda1 no wall where the gap and the mixing time are known to scale as l2 and l2log l respectively this improves considerably over previously known results for the system without the wall we show that the equilibrium phase transition has a clear dynamical manifestation for lambda geq 1 the relaxation is again at least as fast as the diffusive free case but in the strictly delocalized phase lambda 1 the gap is shown to be ol52 up to logarithmic corrections as an application of our bounds we prove stretched exponential relaxation of local functions in the localized regime | [['we', 'consider', 'paths', 'of', 'a', 'onedimensional', 'simple', 'random', 'walk', 'conditioned', 'to', 'come', 'back', 'to', 'the', 'origin', 'after', 'l', 'steps', 'l', 'an', 'even', 'integer', 'in', 'the', 'pinning', 'model', 'each', 'path', 'eta', 'has', 'a', 'weight', 'lambdaneta', 'where', 'lambda0', 'and', 'neta', 'is', 'the', 'number', 'of', 'zeros', 'in', 'eta', 'when', 'the', 'paths', 'are', 'constrained', 'to', 'be', 'nonnegative', 'the', 'polymer', 'is', 'said', 'to', 'satisfy', 'a', 'hardwall', 'constraint', 'such', 'models', 'are', 'well', 'known', 'to', 'undergo', 'a', 'localizationdelocalization', 'transition', 'as', 'the', 'pinning', 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709.2613 | From Copenhagen to neo-Copenhagen interpretation | Positive and negative features of the Copenhagen interpretation are
discussed. As positive features can be mentioned its pragmatism and its
awareness of the crucial role of measurement. However, the main part of the
contribution is devoted to the negative features, to wit, its pragmatism (once
again), its confounding of preparation and measurement, its classical account
of measurement, its completeness claims, the ambiguity of its notion of
correspondence, its confused notion of complementarity. It is demonstrated how
confusions and paradoxes stemming from the negative features of the Copenhagen
interpretation can be dealt with in an amended interpretation, to be referred
to as `neo-Copenhagen interpretation', in which the role of the measuring
instrument is taken seriously by recognizing the quantum mechanical character
of its interaction with the microscopic object. The ensuing necessity of
extending the notion of a quantum mechanical observable from the Hermitian
operator of the standard formalism to the positive operator-valued measure of a
generalized formalism is demonstrated to yield a sound mathematical basis for a
transition from the Copenhagen contextualistic-realist interpretation to the
neo-Copenhagen empiricist one. Applications to the uncertainty relations and to
the Bell inequalities are briefly discussed.
| quant-ph | positive and negative features of the copenhagen interpretation are discussed as positive features can be mentioned its pragmatism and its awareness of the crucial role of measurement however the main part of the contribution is devoted to the negative features to wit its pragmatism once again its confounding of preparation and measurement its classical account of measurement its completeness claims the ambiguity of its notion of correspondence its confused notion of complementarity it is demonstrated how confusions and paradoxes stemming from the negative features of the copenhagen interpretation can be dealt with in an amended interpretation to be referred to as neocopenhagen interpretation in which the role of the measuring instrument is taken seriously by recognizing the quantum mechanical character of its interaction with the microscopic object the ensuing necessity of extending the notion of a quantum mechanical observable from the hermitian operator of the standard formalism to the positive operatorvalued measure of a generalized formalism is demonstrated to yield a sound mathematical basis for a transition from the copenhagen contextualisticrealist interpretation to the neocopenhagen empiricist one applications to the uncertainty relations and to the bell inequalities are briefly discussed | [['positive', 'and', 'negative', 'features', 'of', 'the', 'copenhagen', 'interpretation', 'are', 'discussed', 'as', 'positive', 'features', 'can', 'be', 'mentioned', 'its', 'pragmatism', 'and', 'its', 'awareness', 'of', 'the', 'crucial', 'role', 'of', 'measurement', 'however', 'the', 'main', 'part', 'of', 'the', 'contribution', 'is', 'devoted', 'to', 'the', 'negative', 'features', 'to', 'wit', 'its', 'pragmatism', 'once', 'again', 'its', 'confounding', 'of', 'preparation', 'and', 'measurement', 'its', 'classical', 'account', 'of', 'measurement', 'its', 'completeness', 'claims', 'the', 'ambiguity', 'of', 'its', 'notion', 'of', 'correspondence', 'its', 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709.2614 | Electronic superlattices in corrugated graphene | We theoretically investigate electron transport through corrugated graphene
ribbons and show how the ribbon curvature leads to an electronic superlattice
with a period set by the corrugation wave length. Transport through the ribbon
depends sensitively on the superlattice band structure which, in turn, strongly
depends on the geometry of the deformed sheet. In particular, we find that for
ribbon widths where the transverse level separation is comparable to the the
band edge energy, a strong current switching occurs as function of an applied
backgate voltage. Thus, artificially corrugated graphene sheets or ribbons can
be used for the study of Dirac fermions in periodic potentials. Furthermore,
this provides an additional design paradigm for graphene-based electronics.
| cond-mat.mes-hall | we theoretically investigate electron transport through corrugated graphene ribbons and show how the ribbon curvature leads to an electronic superlattice with a period set by the corrugation wave length transport through the ribbon depends sensitively on the superlattice band structure which in turn strongly depends on the geometry of the deformed sheet in particular we find that for ribbon widths where the transverse level separation is comparable to the the band edge energy a strong current switching occurs as function of an applied backgate voltage thus artificially corrugated graphene sheets or ribbons can be used for the study of dirac fermions in periodic potentials furthermore this provides an additional design paradigm for graphenebased electronics | [['we', 'theoretically', 'investigate', 'electron', 'transport', 'through', 'corrugated', 'graphene', 'ribbons', 'and', 'show', 'how', 'the', 'ribbon', 'curvature', 'leads', 'to', 'an', 'electronic', 'superlattice', 'with', 'a', 'period', 'set', 'by', 'the', 'corrugation', 'wave', 'length', 'transport', 'through', 'the', 'ribbon', 'depends', 'sensitively', 'on', 'the', 'superlattice', 'band', 'structure', 'which', 'in', 'turn', 'strongly', 'depends', 'on', 'the', 'geometry', 'of', 'the', 'deformed', 'sheet', 'in', 'particular', 'we', 'find', 'that', 'for', 'ribbon', 'widths', 'where', 'the', 'transverse', 'level', 'separation', 'is', 'comparable', 'to', 'the', 'the', 'band', 'edge', 'energy', 'a', 'strong', 'current', 'switching', 'occurs', 'as', 'function', 'of', 'an', 'applied', 'backgate', 'voltage', 'thus', 'artificially', 'corrugated', 'graphene', 'sheets', 'or', 'ribbons', 'can', 'be', 'used', 'for', 'the', 'study', 'of', 'dirac', 'fermions', 'in', 'periodic', 'potentials', 'furthermore', 'this', 'provides', 'an', 'additional', 'design', 'paradigm', 'for', 'graphenebased', 'electronics']] | [-0.2084706016129961, 0.1721102738207392, -0.013739333587102266, 0.0185949873330333, -0.048604310657665656, -0.1543073605157827, 0.0351783466482486, 0.4710743118796432, -0.3057418513324177, -0.2825358057733658, -0.005358120568480604, -0.23141185721390667, -0.19433804301406143, 0.22387131194690274, 0.014650407661847248, 0.00936072227634947, 0.055564105040965636, -0.049896977445633525, -0.07893099396473222, -0.1685839033677455, 0.3023608651159233, 0.07230766061611735, 0.3285952031350972, 0.13680218763469734, -0.0018761558907531332, 0.0384452410364981, 0.11479787314754886, 0.038094034660485034, -0.1828407060394902, 0.06750318417815786, 0.15311851261771822, -0.13286431340435356, 0.1996806705423647, -0.5113813875961983, -0.18086477881910182, -0.042259198319362964, 0.16035905454242438, 0.10381280714870643, -0.035682192364331795, -0.2569097633751338, 0.06365272616804168, -0.1104201961108565, -0.12700210108519777, -0.014162544602234112, 0.015886317926311965, 0.024426494093954955, -0.20950070087922523, 0.06109300888094463, 0.027530616361713202, 0.02405027157970165, -0.06755375478359495, -0.07475044976168296, -0.12521736133279965, 0.06178307661346544, 0.04043333596558098, 0.027269382029005914, 0.21356155420653522, -0.126732055663556, -0.1118179149353844, 0.3803219805030446, -0.07145578871693528, -0.17891399851559023, 0.13546698673611932, -0.16060994778914997, -0.015795431246882992, 0.15634320323404513, 0.1488513598185882, 0.053319163550520646, -0.13212444181523383, 0.09904918221403486, -0.0433550085340118, 0.174000609294397, 0.10023357732049924, 0.05448905070998559, 0.2942218295167805, 0.19188976105049318, 0.13723179637740382, 0.1655596780995103, -0.14717468906095937, 0.0010054491811611673, -0.24615989408962297, -0.1702211106016317, -0.18643379806165108, 0.0759535644027525, -0.06503062496426935, -0.2784169524450574, 0.49984309265569765, 0.1304335137706642, 0.19813894496193124, -0.041986401085619275, 0.22222390982910598, 0.17190825189742068, 0.08062095913932385, 0.03987402025111869, 0.25782824896088097, 0.1374840701495199, 0.09402710280234092, -0.23914538451936096, 0.03203460476524605, 0.007644734529190157] |
709.2615 | Bulk Cr tips for scanning tunneling microscopy and spin-polarized
scanning tunneling microscopy | A simple, reliable method for preparation of bulk Cr tips for Scanning
Tunneling Microscopy (STM) is proposed and its potentialities in performing
high-quality and high-resolution STM and Spin Polarized-STM (SP-STM) are
investigated. Cr tips show atomic resolution on ordered surfaces. Contrary to
what happens with conventional W tips, rest atoms of the Si(111)-7x7
reconstruction can be routinely observed, probably due to a different
electronic structure of the tip apex. SP-STM measurements of the Cr(001)
surface showing magnetic contrast are reported. Our results reveal that the
peculiar properties of these tips can be suited in a number of STM experimental
situations.
| cond-mat.mtrl-sci | a simple reliable method for preparation of bulk cr tips for scanning tunneling microscopy stm is proposed and its potentialities in performing highquality and highresolution stm and spin polarizedstm spstm are investigated cr tips show atomic resolution on ordered surfaces contrary to what happens with conventional w tips rest atoms of the si1117x7 reconstruction can be routinely observed probably due to a different electronic structure of the tip apex spstm measurements of the cr001 surface showing magnetic contrast are reported our results reveal that the peculiar properties of these tips can be suited in a number of stm experimental situations | [['a', 'simple', 'reliable', 'method', 'for', 'preparation', 'of', 'bulk', 'cr', 'tips', 'for', 'scanning', 'tunneling', 'microscopy', 'stm', 'is', 'proposed', 'and', 'its', 'potentialities', 'in', 'performing', 'highquality', 'and', 'highresolution', 'stm', 'and', 'spin', 'polarizedstm', 'spstm', 'are', 'investigated', 'cr', 'tips', 'show', 'atomic', 'resolution', 'on', 'ordered', 'surfaces', 'contrary', 'to', 'what', 'happens', 'with', 'conventional', 'w', 'tips', 'rest', 'atoms', 'of', 'the', 'si1117x7', 'reconstruction', 'can', 'be', 'routinely', 'observed', 'probably', 'due', 'to', 'a', 'different', 'electronic', 'structure', 'of', 'the', 'tip', 'apex', 'spstm', 'measurements', 'of', 'the', 'cr001', 'surface', 'showing', 'magnetic', 'contrast', 'are', 'reported', 'our', 'results', 'reveal', 'that', 'the', 'peculiar', 'properties', 'of', 'these', 'tips', 'can', 'be', 'suited', 'in', 'a', 'number', 'of', 'stm', 'experimental', 'situations']] | [-0.09623822609592944, 0.12110936271045546, -0.09358756844368246, 0.04536357935579174, -0.05358796181025529, -0.17886859305541625, 0.038340766984155644, 0.4584896174268891, -0.2742879366163503, -0.3336962245291833, 0.0002968284475494816, -0.3172124137330537, -0.12564766245442582, 0.2624544289922624, -0.010219430447452597, 0.021987821153633184, 0.07929036248889235, -0.045954027624725544, -0.08120747086312151, -0.2282905928178948, 0.2566521643105932, 0.0800591136959165, 0.35327272377955266, 0.06866961194559781, 0.03126689759929749, -0.010684612188300099, 0.05105812152414912, 0.1094770596569611, -0.15131924249917666, 0.12180085735150961, 0.24374490275489863, -0.02315726443993473, 0.14918675660532005, -0.5202196810319267, -0.20975616099454011, -0.05058078791456993, 0.14602638576932328, 0.1420068143481257, -0.08139353944106271, -0.29392694691290155, 0.08572203787913865, -0.025543334470553833, -0.1259202705014196, -0.12321453030230571, -0.07742158599160236, 0.03775625479656902, -0.2070165533564204, 0.08215526214828997, -0.003752047854541528, 0.12048675419028962, -0.08002023785163394, -0.0636769277843261, -0.056197455352774324, 0.07518253650403384, -0.021198891039768405, 0.046020172489336646, 0.2114785366945646, -0.096680577392831, -0.1124131309357707, 0.33696299463962065, -0.02702622768948927, -0.08694261242870731, 0.24256471402453955, -0.22219579318782898, -0.069191405756606, 0.12747141366561104, 0.02881230785502027, 0.1557792032730173, -0.12683757532898318, 0.049169845938461486, -0.02815913110430531, 0.16101707078309524, 0.12611240447696412, 0.0617278294198008, 0.2146248458273182, 0.18954971792044664, 0.03420445535595369, 0.07338496901428873, -0.23775613797367598, 0.024167213551323823, -0.19848013111399582, -0.20139117314094546, -0.2313181529729392, 0.0741760294244747, -0.013551953765640102, -0.13870393870059738, 0.3312789151419161, 0.1368800923604556, 0.25327199690556623, -0.09520823049660057, 0.3401179635389285, 0.010270789784209972, 0.06528042820799682, -0.040438612899507835, 0.22296132580988637, 0.1505753199153608, 0.08315179814499887, -0.2701448753259775, 0.10340379018835122, -0.02164288902316581] |
709.2616 | Entropy production at freeze-out from dissipative fluids | Entropy production due to shear viscosity during the continuous freeze-out of
a longitudinally expanding dissipative fluid is addressed. Assuming the
validity of the fluid dynamical description during the continuous removal of
interacting matter we estimated a small entropy production as function of the
freeze-out duration and the ratio of dissipative to non-dissipative quantities
in case of a relativistic massless pion fluid.
| nucl-th | entropy production due to shear viscosity during the continuous freezeout of a longitudinally expanding dissipative fluid is addressed assuming the validity of the fluid dynamical description during the continuous removal of interacting matter we estimated a small entropy production as function of the freezeout duration and the ratio of dissipative to nondissipative quantities in case of a relativistic massless pion fluid | [['entropy', 'production', 'due', 'to', 'shear', 'viscosity', 'during', 'the', 'continuous', 'freezeout', 'of', 'a', 'longitudinally', 'expanding', 'dissipative', 'fluid', 'is', 'addressed', 'assuming', 'the', 'validity', 'of', 'the', 'fluid', 'dynamical', 'description', 'during', 'the', 'continuous', 'removal', 'of', 'interacting', 'matter', 'we', 'estimated', 'a', 'small', 'entropy', 'production', 'as', 'function', 'of', 'the', 'freezeout', 'duration', 'and', 'the', 'ratio', 'of', 'dissipative', 'to', 'nondissipative', 'quantities', 'in', 'case', 'of', 'a', 'relativistic', 'massless', 'pion', 'fluid']] | [-0.1574784647539777, 0.2710258102533026, -0.14424361082435141, 0.04323017772966538, 0.01208288701953458, -0.08380633745472267, -0.02090300302799852, 0.23035190118568355, -0.25478503655367457, -0.2250810109201025, -0.0005951943658444969, -0.2805398512082022, 0.035031976754639725, 0.10807306837046245, 0.016906606949499397, 0.11324272736082555, 0.02938755822451938, 0.04459023263427566, -0.04524402833375774, -0.18420026675019352, 0.30424709799775823, 0.0820821537178193, 0.22833699397132046, 0.13099086043409636, 0.1095203796065733, 0.009797679275640698, -0.061811071001832966, 0.028839282905224892, -0.1820125696630996, -0.027351182686989425, 0.1872234615176672, 0.04090252761408442, 0.19046380523531165, -0.3988983856178209, -0.2841559679201636, 0.1358757504857466, 0.10509259832763403, 0.11247074840992086, -0.03849226618032964, -0.22745106237574067, -0.01685930170179879, -0.2422038803151885, -0.15641937468994838, -0.046700961948906786, 0.059588748381518925, 0.01625345034723277, -0.26963313776602754, 0.23964159679217417, 0.03249915273713146, 0.014892440296892748, -0.12896739564774956, -0.02339961187394916, -0.11911930922479903, 0.009937059882356495, 0.11817842427179309, 0.030768375851397144, 0.2743900637829401, -0.21527448867554547, -0.017854003602119743, 0.4452880403546036, -0.12544724301503757, -0.20458353625335654, 0.22934199868105962, -0.14674266725473228, -0.10554837488920474, 0.1933280133840735, 0.22563923687719908, 0.10751447802959163, -0.1956008601109268, 0.02755166114533137, 0.002606511375576746, 0.13609640662878997, 0.10645574906871455, -0.0160738543042394, 0.26048665218910233, 0.19218868142390838, -0.0456732918248802, 0.18772039583074998, -0.03612911260732617, -0.16916314704862775, -0.40256065869184793, -0.1744851128763107, -0.17590484067179324, 0.10216275550669333, -0.11791308953204443, -0.17982627602568904, 0.3518291339583573, 0.10882958281235616, 0.18137533838486636, 0.0008531473996881091, 0.33694529411245566, 0.11386569663996762, -0.04111628100031712, 0.09968756291954244, 0.2958274594218027, 0.2134895489482423, 0.17026217651293904, -0.27625221950689055, 0.046956999471685926, 0.08980860373341158] |
709.2617 | On the corotation torque in a radiatively inefficient disk | We consider the angular momentum exchange at the corotation resonance between
a two-dimensional gaseous disk and a uniformly rotating external potential,
assuming that the disk flow is adiabatic. We first consider the linear case for
an isolated resonance, for which we give an expression of the corotation torque
that involves the pressure perturbation, and which reduces to the usual
dependence on the vortensity gradient in the limit of a cold disk. Although
this expression requires the solution of the hydrodynamic equations, it
provides some insight into the dynamics of the corotation region. In the
general case, we find an additional dependence on the entropy gradient at
corotation. This dependence is associated to the advection of entropy
perturbations. These are not associated to pressure perturbations. They remain
confined to the corotation region, where they yield a singular contribution to
the corotation torque. In a second part, we check our torque expression by
means of customized two-dimensional hydrodynamical simulations. In a third
part, we contemplate the case of a planet embedded in a Keplerian disk, assumed
to be adiabatic. We find an excess of corotation torque that scales with the
entropy gradient, and we check that the contribution of the entropy
perturbation to the torque is in agreement with the expression obtained from
the linear analysis. We finally discuss some implications of the corotation
torque expression for the migration of low mass planets in the regions of
protoplanetary disks where the flow is radiatively inefficient on the timescale
of the horseshoe U-turns.
| astro-ph | we consider the angular momentum exchange at the corotation resonance between a twodimensional gaseous disk and a uniformly rotating external potential assuming that the disk flow is adiabatic we first consider the linear case for an isolated resonance for which we give an expression of the corotation torque that involves the pressure perturbation and which reduces to the usual dependence on the vortensity gradient in the limit of a cold disk although this expression requires the solution of the hydrodynamic equations it provides some insight into the dynamics of the corotation region in the general case we find an additional dependence on the entropy gradient at corotation this dependence is associated to the advection of entropy perturbations these are not associated to pressure perturbations they remain confined to the corotation region where they yield a singular contribution to the corotation torque in a second part we check our torque expression by means of customized twodimensional hydrodynamical simulations in a third part we contemplate the case of a planet embedded in a keplerian disk assumed to be adiabatic we find an excess of corotation torque that scales with the entropy gradient and we check that the contribution of the entropy perturbation to the torque is in agreement with the expression obtained from the linear analysis we finally discuss some implications of the corotation torque expression for the migration of low mass planets in the regions of protoplanetary disks where the flow is radiatively inefficient on the timescale of the horseshoe uturns | [['we', 'consider', 'the', 'angular', 'momentum', 'exchange', 'at', 'the', 'corotation', 'resonance', 'between', 'a', 'twodimensional', 'gaseous', 'disk', 'and', 'a', 'uniformly', 'rotating', 'external', 'potential', 'assuming', 'that', 'the', 'disk', 'flow', 'is', 'adiabatic', 'we', 'first', 'consider', 'the', 'linear', 'case', 'for', 'an', 'isolated', 'resonance', 'for', 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709.2618 | On Frequency Optimisation for Power Saving in WSNs: Finding Optimum
Hardware Timers Frequencies | Wireless Sensor Networks research and demand are now in full expansion, since
people came to understand these are the key to a large number of issues in
industry, commerce, home automation, healthcare, agriculture and environment,
monitoring, public safety etc. One of the most challenging research problems in
sensor networks research is power awareness and power-saving techniques. In
this master's thesis, we have studied one particular power-saving technique,
i.e. frequency scaling. In particular, we analysed the close relationship
between clock frequencies in a microcontroller and several types of constraints
imposed on these frequencies, e.g. by other components of the microcontroller,
by protocol specifications, by external factors etc. Among these constraints,
we were especially interested in the ones imposed by the timer service and by
the serial ports' transmission rates. Our efforts resulted in a microcontroller
configuration management tool which aims at assisting application programmers
in choosing microcontroller configurations, in function of the particular needs
and constraints of their application.
| cs.NI | wireless sensor networks research and demand are now in full expansion since people came to understand these are the key to a large number of issues in industry commerce home automation healthcare agriculture and environment monitoring public safety etc one of the most challenging research problems in sensor networks research is power awareness and powersaving techniques in this masters thesis we have studied one particular powersaving technique ie frequency scaling in particular we analysed the close relationship between clock frequencies in a microcontroller and several types of constraints imposed on these frequencies eg by other components of the microcontroller by protocol specifications by external factors etc among these constraints we were especially interested in the ones imposed by the timer service and by the serial ports transmission rates our efforts resulted in a microcontroller configuration management tool which aims at assisting application programmers in choosing microcontroller configurations in function of the particular needs and constraints of their application | [['wireless', 'sensor', 'networks', 'research', 'and', 'demand', 'are', 'now', 'in', 'full', 'expansion', 'since', 'people', 'came', 'to', 'understand', 'these', 'are', 'the', 'key', 'to', 'a', 'large', 'number', 'of', 'issues', 'in', 'industry', 'commerce', 'home', 'automation', 'healthcare', 'agriculture', 'and', 'environment', 'monitoring', 'public', 'safety', 'etc', 'one', 'of', 'the', 'most', 'challenging', 'research', 'problems', 'in', 'sensor', 'networks', 'research', 'is', 'power', 'awareness', 'and', 'powersaving', 'techniques', 'in', 'this', 'masters', 'thesis', 'we', 'have', 'studied', 'one', 'particular', 'powersaving', 'technique', 'ie', 'frequency', 'scaling', 'in', 'particular', 'we', 'analysed', 'the', 'close', 'relationship', 'between', 'clock', 'frequencies', 'in', 'a', 'microcontroller', 'and', 'several', 'types', 'of', 'constraints', 'imposed', 'on', 'these', 'frequencies', 'eg', 'by', 'other', 'components', 'of', 'the', 'microcontroller', 'by', 'protocol', 'specifications', 'by', 'external', 'factors', 'etc', 'among', 'these', 'constraints', 'we', 'were', 'especially', 'interested', 'in', 'the', 'ones', 'imposed', 'by', 'the', 'timer', 'service', 'and', 'by', 'the', 'serial', 'ports', 'transmission', 'rates', 'our', 'efforts', 'resulted', 'in', 'a', 'microcontroller', 'configuration', 'management', 'tool', 'which', 'aims', 'at', 'assisting', 'application', 'programmers', 'in', 'choosing', 'microcontroller', 'configurations', 'in', 'function', 'of', 'the', 'particular', 'needs', 'and', 'constraints', 'of', 'their', 'application']] | [-0.1819872921450606, 0.06730146405929581, -0.008804659696614158, 0.011377922146539852, -0.09140453313011676, -0.18023478656217362, 0.07839860787019841, 0.40451871627305125, -0.23702669640062848, -0.3653409917473416, 0.14844786078238836, -0.26437514741857876, -0.14411885407458566, 0.23521325637032336, -0.12423183600922245, 0.09645626801021892, 0.0408623653730743, 0.031311533664341404, 0.025647580783513577, -0.2572353490579673, 0.2762300600430374, 0.06508087784146206, 0.3527198190081723, 0.06761823368812853, 0.04027539119419135, -0.0007468835521442226, -0.07090336930808387, -0.044576415352971306, -0.09779326072776148, 0.14463970553766511, 0.35396557663128225, 0.1908737993681261, 0.36265729082441783, -0.4882972786627427, -0.17436837758780516, 0.07552432027775087, 0.10665418831416025, 0.0353146242884082, -0.025772905661695034, -0.27747641120082406, 0.05507697619474198, -0.21805264567956328, -0.12636817289133928, -0.034289205367264305, 0.00828883914229802, 0.07019614360348286, -0.21862726511810965, -0.04624475372801948, 0.0032250112794999833, 0.12163788341634164, -0.03275666612677889, -0.09296315556828262, 0.016473387037197577, 0.2200060109445778, 0.06777768985138428, -0.021330767074641124, 0.16889570168104565, -0.18363311326372897, -0.12429151403764853, 0.3714990670825178, 0.02796355928471194, -0.16267486705438858, 0.18535168565326382, -0.08947620816570058, -0.1986589517232172, 0.02825439977128047, 0.2307406417624671, 0.06176897230752614, -0.21188329727332922, 0.06992196247255712, 0.07713103865544442, 0.14632775290880964, 0.10176630455947516, 0.03893205825581298, 0.19734563619853293, 0.1862256201941968, 0.08059971886380285, 0.11382512556708747, -0.04097629865319055, -0.07970455230826724, -0.20936088516860257, -0.10571331509736756, -0.1385005985245203, -0.010383004130525926, -0.05530827077607774, -0.08241150411408796, 0.3825348620450336, 0.17443820837991242, 0.0995606474307236, -0.013211311477006566, 0.38433370324252525, 0.0674293891274771, 0.11824380406664826, 0.0651963911051685, 0.18377004163943914, 0.04514252996113434, 0.2090650339510669, -0.1609082981211699, 0.09869154868831657, -0.016352823534626748] |
709.2619 | Comment on "Scaling behavior of classical wave transport in mesoscopic
media at the localization transition" | We emphasize the importance of the position dependence of the diffusion
coefficient D(r) in the self-consistent theory of localization and argue that
the scaling law T ~ ln(L)/L^2 obtained by Cheung and Zhang [Phys. Rev. B 72,
235102 (2005)] for the average transmission coefficient T of a disordered slab
of thickness L at the localization transition is an artifact of replacing D(r)
by its harmonic mean. The correct scaling T ~ 1/L^2 is obtained by properly
treating the position dependence of D(r).
| cond-mat.dis-nn cond-mat.mes-hall | we emphasize the importance of the position dependence of the diffusion coefficient dr in the selfconsistent theory of localization and argue that the scaling law t lnll2 obtained by cheung and zhang phys rev b 72 235102 2005 for the average transmission coefficient t of a disordered slab of thickness l at the localization transition is an artifact of replacing dr by its harmonic mean the correct scaling t 1l2 is obtained by properly treating the position dependence of dr | [['we', 'emphasize', 'the', 'importance', 'of', 'the', 'position', 'dependence', 'of', 'the', 'diffusion', 'coefficient', 'dr', 'in', 'the', 'selfconsistent', 'theory', 'of', 'localization', 'and', 'argue', 'that', 'the', 'scaling', 'law', 't', 'lnll2', 'obtained', 'by', 'cheung', 'and', 'zhang', 'phys', 'rev', 'b', '72', '235102', '2005', 'for', 'the', 'average', 'transmission', 'coefficient', 't', 'of', 'a', 'disordered', 'slab', 'of', 'thickness', 'l', 'at', 'the', 'localization', 'transition', 'is', 'an', 'artifact', 'of', 'replacing', 'dr', 'by', 'its', 'harmonic', 'mean', 'the', 'correct', 'scaling', 't', '1l2', 'is', 'obtained', 'by', 'properly', 'treating', 'the', 'position', 'dependence', 'of', 'dr']] | [-0.11412907346399336, 0.1312366914834099, -0.04282919964104702, -0.038939373768111574, 0.0005246446456147146, -0.13678777599825134, 0.09342304407766301, 0.31135147175739836, -0.22775824799473526, -0.2831749495213168, -0.002457456193168801, -0.298805756706603, -0.12001399020369671, 0.14548102148537395, -0.05860019735756177, 0.04221415023328265, -0.04455133072466035, 0.020271641202270985, -0.05275727744723369, -0.23138883024383383, 0.2145513756896216, 0.13127985685073498, 0.294341291374633, 0.08176279865069716, 0.07822621267147456, 0.09763211700947413, -0.08347997200215541, 0.048212889959163306, -0.16188916967508657, 0.047292197241058834, 0.16110520901547484, 0.014313522528833415, 0.24127654957620404, -0.3166676181238852, -0.23681387262524967, -0.012266219343070555, 0.09949012717255686, 0.05669354561339073, 0.026659284022789966, -0.2770376911481159, 0.07100265375574273, -0.1624550484032429, -0.1597556168997448, -0.0354684013784922, 0.1724201068989461, 0.01668599898679347, -0.2996215432457909, 0.1963003341865997, 0.09739377927270872, 0.09836103073969672, -0.025428055445192076, -0.11835880427845294, -0.03497224922963901, 0.0847068745466067, 0.025133692075887434, 0.06804655472854082, 0.12049588057082854, -0.11349550401202485, -0.06302969058816427, 0.3275736893609732, -0.10704877392589292, -0.1505251264706537, 0.11997748656740671, -0.18765049898714015, -0.06366379936284657, 0.125785245960932, 0.07019315652926511, 0.14035199319288397, -0.13072522265152842, 0.16016177045434854, -0.03149486461630727, 0.1322616873238283, 0.09548199185040555, -0.030317320352821035, 0.11631583423748659, 0.1128968120349241, -0.015755016934362393, 0.060075239325531674, -0.13925250785283838, -0.04949339618316934, -0.33307743433249903, -0.1493139424526333, -0.2302240779316878, 0.08245256927477408, -0.08883967761007798, -0.11208789842497982, 0.3532693972103769, 0.128781032347698, 0.2585573895020953, 0.04156283356390799, 0.20164740754621505, 0.18787361945532546, 0.006602666680435827, 0.0949084088559958, 0.24517117987705184, 0.18041257365441682, 0.11603416313853444, -0.3266657509331155, 0.03716057709335715, 0.1297415756042811] |
709.262 | Constituents of the soft X-ray background | The X-ray background is generated by various classes of objects and variety
of emission mechanisms. Relative contribution of individual components depends
on energy. The goal is to assess the integral emission of the major components
of the soft X-ray background (extragalactic discrete sources dominated by AGNs,
galactic plasma, and the Warm/Hot Intergalactic Medium), investigating the
angular structure of the background. Fluctuations of the background are
measured using the auto-correlation function of the XRB determined in 5 energy
bands between 0.3 and 4.5 keV. The investigation is based on the extensive
observational data set selected from the XMM-Newton archives. Amplitudes of the
auto-correlation functions calculated in three energy bands above ~1 keV are
consistent with the conjecture that the background fluctuations result solely
from clustering of sources which produce the background. At energies below 1
keV the relative fluctuation amplitude decreases indicating that a fraction of
the soft XRB is associated with a smooth plasma emission in the Galaxy. It is
shown, however, that the mean spectrum of extragalactic discrete sources
steepens in the soft X-rays and is not well represented by a single power law
in the energy range 0.3-4.5 keV. The WHIM contribution to the total background
fluctuations is small and consistent with the WHIM properties derived from the
cross-correlation of the XRB with galaxies.
| astro-ph | the xray background is generated by various classes of objects and variety of emission mechanisms relative contribution of individual components depends on energy the goal is to assess the integral emission of the major components of the soft xray background extragalactic discrete sources dominated by agns galactic plasma and the warmhot intergalactic medium investigating the angular structure of the background fluctuations of the background are measured using the autocorrelation function of the xrb determined in 5 energy bands between 03 and 45 kev the investigation is based on the extensive observational data set selected from the xmmnewton archives amplitudes of the autocorrelation functions calculated in three energy bands above 1 kev are consistent with the conjecture that the background fluctuations result solely from clustering of sources which produce the background at energies below 1 kev the relative fluctuation amplitude decreases indicating that a fraction of the soft xrb is associated with a smooth plasma emission in the galaxy it is shown however that the mean spectrum of extragalactic discrete sources steepens in the soft xrays and is not well represented by a single power law in the energy range 0345 kev the whim contribution to the total background fluctuations is small and consistent with the whim properties derived from the crosscorrelation of the xrb with galaxies | [['the', 'xray', 'background', 'is', 'generated', 'by', 'various', 'classes', 'of', 'objects', 'and', 'variety', 'of', 'emission', 'mechanisms', 'relative', 'contribution', 'of', 'individual', 'components', 'depends', 'on', 'energy', 'the', 'goal', 'is', 'to', 'assess', 'the', 'integral', 'emission', 'of', 'the', 'major', 'components', 'of', 'the', 'soft', 'xray', 'background', 'extragalactic', 'discrete', 'sources', 'dominated', 'by', 'agns', 'galactic', 'plasma', 'and', 'the', 'warmhot', 'intergalactic', 'medium', 'investigating', 'the', 'angular', 'structure', 'of', 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709.2621 | BCS-BEC crossover in a random external potential | We investigate the ground state properties of a disordered superfluid Fermi
gas across the BCS-BEC (Bose Einstein condensate) crossover. We show that, for
weak disorder, both the depletion of the condensate fraction of pairs and the
normal fluid density exhibit a nonmonotonic behavior as a function of the
interaction parameter $1/k_Fa$, reaching their minimum value near unitarity. We
find that, moving away from the weak coupling BCS regime, Anderson's theorem
ceases to apply and the superfluid order parameter is more and more affected by
the random potential.
| cond-mat.supr-con | we investigate the ground state properties of a disordered superfluid fermi gas across the bcsbec bose einstein condensate crossover we show that for weak disorder both the depletion of the condensate fraction of pairs and the normal fluid density exhibit a nonmonotonic behavior as a function of the interaction parameter 1k_fa reaching their minimum value near unitarity we find that moving away from the weak coupling bcs regime andersons theorem ceases to apply and the superfluid order parameter is more and more affected by the random potential | [['we', 'investigate', 'the', 'ground', 'state', 'properties', 'of', 'a', 'disordered', 'superfluid', 'fermi', 'gas', 'across', 'the', 'bcsbec', 'bose', 'einstein', 'condensate', 'crossover', 'we', 'show', 'that', 'for', 'weak', 'disorder', 'both', 'the', 'depletion', 'of', 'the', 'condensate', 'fraction', 'of', 'pairs', 'and', 'the', 'normal', 'fluid', 'density', 'exhibit', 'a', 'nonmonotonic', 'behavior', 'as', 'a', 'function', 'of', 'the', 'interaction', 'parameter', '1k_fa', 'reaching', 'their', 'minimum', 'value', 'near', 'unitarity', 'we', 'find', 'that', 'moving', 'away', 'from', 'the', 'weak', 'coupling', 'bcs', 'regime', 'andersons', 'theorem', 'ceases', 'to', 'apply', 'and', 'the', 'superfluid', 'order', 'parameter', 'is', 'more', 'and', 'more', 'affected', 'by', 'the', 'random', 'potential']] | [-0.1816735676588588, 0.23791587745857445, -0.10090302233584225, 0.07340203560374374, -0.01176068762880425, -0.1490662642808761, 0.10685215627356313, 0.3004777632561664, -0.24360538680149718, -0.22485810161438272, -0.010595328426313435, -0.3248875834979117, -0.08729102471193602, 0.12116598591295093, 0.06387067379614035, 0.020280667981349452, -0.0188930157848179, 0.02478988261806757, -0.1437305160527399, -0.20998033608288266, 0.3804827047468618, -0.02171237506838732, 0.32145857423284024, 0.11263137617078069, 0.02722273490101987, 0.010039564043413414, 0.11442787099499689, 0.047935948658431336, -0.1764434557578995, -0.008338899622389744, 0.2051246522629341, -0.01986905523483793, 0.26560291491968685, -0.38571572713120733, -0.21265278862745957, 0.1057853875194438, 0.15739799530223705, 0.16946224950600502, -0.02534669917787501, -0.3382901564283773, -0.017400376709871167, -0.20625188685466297, -0.21984467158895418, -0.0953907367968282, 0.022941109204534873, 0.023765989982652978, -0.23389697626103148, 0.17481155818609825, 0.07232905143796098, 0.036567991177096616, -0.07670029065183223, -0.05342832324636537, -0.04307249281555414, 0.07653680725597105, 0.04038577700077101, 0.056575396504296466, 0.18060678856678816, -0.2422112821558014, 0.04874027541941465, 0.367871290765876, -0.134621859448258, -0.09481099853292108, 0.20239576570646362, -0.20461983444320775, -0.013983392476125858, 0.1627576059477707, 0.11808470593288888, 0.06186883868433015, -0.09057882385393388, 0.05660788985957435, -0.06836645427122062, 0.16800246255602255, 0.036934857105099875, 0.05722376582927482, 0.2616763064031338, 0.16329839458042042, 0.07158996733067947, 0.16512541309388917, -0.13162631063375535, -0.13666809942616626, -0.2873289110788772, -0.11744482625210874, -0.21523281403405722, 0.022442379376179603, -0.08077134987895057, -0.19760919860971965, 0.3425050640240485, 0.1788512387713634, 0.2288520829860381, 0.05459712165493118, 0.2161159546136163, 0.14099358516301266, 0.01351709246667925, 0.06097160358128116, 0.30304548827400646, 0.16041696394338859, 0.10063640796985521, -0.31306290776241397, 0.017730276620145455, 0.06776187543724772] |
709.2622 | Decoherence induced by a dynamic spin environment (I): The universal
regime | This article analyzes the decoherence induced on a single qubit by the
interaction with a spin chain with nontrivial internal dynamics (XY-type
interactions). The aim of the paper is to study the existence and properties of
the so-called universal regime, in which the decoherence time scale becomes
independent of the strength of the coupling with the environment. It is shown
that although such regime does exist, as previously established by Cucchietti
\textit{et al} in {\em Phys. Rev. A}, 75:032337 (2007), it is not a clear
signature of a quantum phase transition in the environment. In fact, this kind
of universality also exists in the absence of quantum phase transitions. A
universal regime can be related to the existence of an energy scale separation
between the Hamiltonian of the environment and the one characterizing the
system-environment interaction. The results presented also indicate that in the
strong coupling regime the quantum phase transition does not produce an
enhancement of decoherence (as opposed to what happens in the weak coupling
regime).
| quant-ph | this article analyzes the decoherence induced on a single qubit by the interaction with a spin chain with nontrivial internal dynamics xytype interactions the aim of the paper is to study the existence and properties of the socalled universal regime in which the decoherence time scale becomes independent of the strength of the coupling with the environment it is shown that although such regime does exist as previously established by cucchietti textitet al in em phys rev a 75032337 2007 it is not a clear signature of a quantum phase transition in the environment in fact this kind of universality also exists in the absence of quantum phase transitions a universal regime can be related to the existence of an energy scale separation between the hamiltonian of the environment and the one characterizing the systemenvironment interaction the results presented also indicate that in the strong coupling regime the quantum phase transition does not produce an enhancement of decoherence as opposed to what happens in the weak coupling regime | [['this', 'article', 'analyzes', 'the', 'decoherence', 'induced', 'on', 'a', 'single', 'qubit', 'by', 'the', 'interaction', 'with', 'a', 'spin', 'chain', 'with', 'nontrivial', 'internal', 'dynamics', 'xytype', 'interactions', 'the', 'aim', 'of', 'the', 'paper', 'is', 'to', 'study', 'the', 'existence', 'and', 'properties', 'of', 'the', 'socalled', 'universal', 'regime', 'in', 'which', 'the', 'decoherence', 'time', 'scale', 'becomes', 'independent', 'of', 'the', 'strength', 'of', 'the', 'coupling', 'with', 'the', 'environment', 'it', 'is', 'shown', 'that', 'although', 'such', 'regime', 'does', 'exist', 'as', 'previously', 'established', 'by', 'cucchietti', 'textitet', 'al', 'in', 'em', 'phys', 'rev', 'a', '75032337', '2007', 'it', 'is', 'not', 'a', 'clear', 'signature', 'of', 'a', 'quantum', 'phase', 'transition', 'in', 'the', 'environment', 'in', 'fact', 'this', 'kind', 'of', 'universality', 'also', 'exists', 'in', 'the', 'absence', 'of', 'quantum', 'phase', 'transitions', 'a', 'universal', 'regime', 'can', 'be', 'related', 'to', 'the', 'existence', 'of', 'an', 'energy', 'scale', 'separation', 'between', 'the', 'hamiltonian', 'of', 'the', 'environment', 'and', 'the', 'one', 'characterizing', 'the', 'systemenvironment', 'interaction', 'the', 'results', 'presented', 'also', 'indicate', 'that', 'in', 'the', 'strong', 'coupling', 'regime', 'the', 'quantum', 'phase', 'transition', 'does', 'not', 'produce', 'an', 'enhancement', 'of', 'decoherence', 'as', 'opposed', 'to', 'what', 'happens', 'in', 'the', 'weak', 'coupling', 'regime']] | [-0.1772932458762921, 0.19603479463282372, -0.06630186982984453, 0.02384110487834831, -0.02639075573421566, -0.10523606149805148, 0.04539634071007169, 0.31834738874942603, -0.2550304209578892, -0.28591090238215516, 0.03896365645523912, -0.2388526310538312, -0.17343028124242302, 0.16664381698896008, -0.007801896564280951, -0.007516192909083273, 0.013522396680438914, 0.03670873808820384, -0.05524220633185861, -0.17936938640195876, 0.3179294751446515, 0.08295112937556984, 0.29674933354807903, 0.0952117451303919, 0.06336722364200346, -0.0009279147355749933, 0.07416687023696905, 0.0214325698444631, -0.13041122174298977, 0.005619747836299869, 0.2204296030896626, 0.04130403531033438, 0.24702403038538184, -0.3800659142126026, -0.21993404148842197, 0.12223734240488049, 0.11849416657182646, 0.1585393033757615, -0.040350207279812186, -0.31070472603574034, 0.015478450870870736, -0.16717124631605954, -0.1286318568310824, -0.05904776071961296, 0.04324889146015946, -0.016562092837496066, -0.2643154422227989, 0.10325070278100523, 0.14248418555516434, 0.02152885166165161, 0.006064712650602661, 0.009621962210645967, 0.013469239595873529, 0.1225535621805571, 0.026361641537184906, 0.0555255909700014, 0.09492600396982427, -0.14059063684228942, -0.11371401863955298, 0.3692867649685457, -0.07876629035931125, -0.15214158783116974, 0.24962420256931828, -0.14586793744224066, -0.11474912513625325, 0.1138580581594079, 0.11483373156053026, 0.09166770281427238, -0.14491897937561193, 0.12311355498863429, -0.028950666043772756, 0.19927598219589296, 0.010789271957431752, 0.08850132428805332, 0.18010272593966808, 0.14628503628563225, 0.04810555834682232, 0.14506885447575857, -0.06445326543895595, -0.16012501141725455, -0.3270906698216785, -0.15185471379102758, -0.22812590547360434, 0.08156603133794711, -0.027998410414796355, -0.1705317490638433, 0.3991580815531358, 0.17258490322362366, 0.22280704149561203, -0.016745667648641955, 0.23873725093000692, 0.13158700192565972, 0.04177630344035486, 0.05957810591670673, 0.3357596510729517, 0.14323393708439994, 0.08414130228156426, -0.29474236176549795, 0.09018599495561008, 0.029924025795568365] |
709.2623 | Qudits of composite dimension, mutually unbiased bases and projective
ring geometry | The $d^2$ Pauli operators attached to a composite qudit in dimension $d$ may
be mapped to the vectors of the symplectic module $\mathcal{Z}_d^{2}$
($\mathcal{Z}_d$ the modular ring). As a result, perpendicular vectors
correspond to commuting operators, a free cyclic submodule to a maximal
commuting set, and disjoint such sets to mutually unbiased bases. For
dimensions $d=6,~10,~15,~12$, and 18, the fine structure and the incidence
between maximal commuting sets is found to reproduce the projective line over
the rings $\mathcal{Z}_{6}$, $\mathcal{Z}_{10}$, $\mathcal{Z}_{15}$,
$\mathcal{Z}_6 \times \mathbf{F}_4$ and $\mathcal{Z}_6 \times \mathcal{Z}_3$,
respectively.
| quant-ph math-ph math.MP | the d2 pauli operators attached to a composite qudit in dimension d may be mapped to the vectors of the symplectic module mathcalz_d2 mathcalz_d the modular ring as a result perpendicular vectors correspond to commuting operators a free cyclic submodule to a maximal commuting set and disjoint such sets to mutually unbiased bases for dimensions d6101512 and 18 the fine structure and the incidence between maximal commuting sets is found to reproduce the projective line over the rings mathcalz_6 mathcalz_10 mathcalz_15 mathcalz_6 times mathbff_4 and mathcalz_6 times mathcalz_3 respectively | [['the', 'd2', 'pauli', 'operators', 'attached', 'to', 'a', 'composite', 'qudit', 'in', 'dimension', 'd', 'may', 'be', 'mapped', 'to', 'the', 'vectors', 'of', 'the', 'symplectic', 'module', 'mathcalz_d2', 'mathcalz_d', 'the', 'modular', 'ring', 'as', 'a', 'result', 'perpendicular', 'vectors', 'correspond', 'to', 'commuting', 'operators', 'a', 'free', 'cyclic', 'submodule', 'to', 'a', 'maximal', 'commuting', 'set', 'and', 'disjoint', 'such', 'sets', 'to', 'mutually', 'unbiased', 'bases', 'for', 'dimensions', 'd6101512', 'and', '18', 'the', 'fine', 'structure', 'and', 'the', 'incidence', 'between', 'maximal', 'commuting', 'sets', 'is', 'found', 'to', 'reproduce', 'the', 'projective', 'line', 'over', 'the', 'rings', 'mathcalz_6', 'mathcalz_10', 'mathcalz_15', 'mathcalz_6', 'times', 'mathbff_4', 'and', 'mathcalz_6', 'times', 'mathcalz_3', 'respectively']] | [-0.179544561531213, 0.1255269091542265, 0.0236693845051, 0.025189876334923433, -0.017470627137255376, -0.15392351537380686, -0.014877476229718545, 0.34396039262959144, -0.302130333497189, -0.18246793475501785, 0.08899051130879898, -0.2919173697691138, -0.05852299915577311, 0.17251128707898827, -0.07259868072891017, 0.009515488406688703, 0.03456548832799876, 0.08685494497668271, -0.10954319687401194, -0.27729818039494225, 0.35117533648522886, -0.014677427487629579, 0.24728641552260008, -0.025361735033007655, 0.12829885228605167, 0.024977143111577678, -0.015649939325024804, -0.0034065486567958097, -0.0944777871936378, 0.14227765582206592, 0.30041749408559465, 0.09061706333318953, 0.1279864732159029, -0.3715262221990199, -0.08542376865700978, 0.22182278896727395, 0.14111017650447605, 0.03427900378478736, 0.10581790491166275, -0.2568411068400232, 0.06381889838134734, -0.14961420969821784, -0.16865751354546263, -0.07159840656308139, 0.09218714954104365, -0.034306039034229956, -0.3216723951421644, 0.0154961618685686, 0.05951292778183592, 0.12252057327252881, -0.04830073788989245, -0.11091164458633923, -0.085685251584481, 0.08117396115160706, -0.06259478894687008, 0.05397936341738919, 0.10762993943886036, 0.005176657788092043, -0.16095801479773733, 0.32570291250921424, -0.02481009137657721, -0.23888665426340772, 0.16903491179095353, -0.18521875569404517, -0.08009143760882137, 0.12708863380035704, 0.10793360486263182, 0.0936554487476625, -0.09197361408463088, 0.11619848023713907, -0.15417157666666842, 0.11526908911764622, 0.1359064194101204, 0.06468516131919785, 0.16599893831170914, 0.01073364196515574, 0.11460717743093704, 0.09589852010916419, -0.01176508408743979, -0.04748761850954374, -0.3048576256033124, -0.180111517221099, -0.1317001323261094, 0.1530434310368103, -0.13310004084118324, -0.1504335408780451, 0.4136297057564484, 0.06997040231149962, 0.2644838361160421, 0.03725296892112166, 0.18624176407550894, 0.025156681142107118, 0.17365596056120788, 0.0939196229900983, 0.09198623918360327, 0.24365529612774348, -0.04631577158011723, -0.174663254008742, -0.05113153164729294, 0.1557464343268515] |
709.2624 | Resonant normal form for even periodic FPU chains | In this paper we investigate periodic FPU chains with an even number of
particles. We show that near the equilibrium point, any such chain admits a
\emph{resonant} Birkhoff normal form of order four which is \emph{completely
integrable} - an important fact which helps explain the numerical experiments
of Fermi, Pasta, and Ulam. We analyze the moment map of the integrable
approximation of an even FPU chain. Unlike in the case of odd FPU chains these
integrable systems (generically) exhibit hyperbolic dynamics. As an application
we prove that any FPU chain with Dirichlet boundary conditions admits a
Birkhoff normal form up to order four and show that a KAM theorem applies.
| nlin.SI math.DS | in this paper we investigate periodic fpu chains with an even number of particles we show that near the equilibrium point any such chain admits a emphresonant birkhoff normal form of order four which is emphcompletely integrable an important fact which helps explain the numerical experiments of fermi pasta and ulam we analyze the moment map of the integrable approximation of an even fpu chain unlike in the case of odd fpu chains these integrable systems generically exhibit hyperbolic dynamics as an application we prove that any fpu chain with dirichlet boundary conditions admits a birkhoff normal form up to order four and show that a kam theorem applies | [['in', 'this', 'paper', 'we', 'investigate', 'periodic', 'fpu', 'chains', 'with', 'an', 'even', 'number', 'of', 'particles', 'we', 'show', 'that', 'near', 'the', 'equilibrium', 'point', 'any', 'such', 'chain', 'admits', 'a', 'emphresonant', 'birkhoff', 'normal', 'form', 'of', 'order', 'four', 'which', 'is', 'emphcompletely', 'integrable', 'an', 'important', 'fact', 'which', 'helps', 'explain', 'the', 'numerical', 'experiments', 'of', 'fermi', 'pasta', 'and', 'ulam', 'we', 'analyze', 'the', 'moment', 'map', 'of', 'the', 'integrable', 'approximation', 'of', 'an', 'even', 'fpu', 'chain', 'unlike', 'in', 'the', 'case', 'of', 'odd', 'fpu', 'chains', 'these', 'integrable', 'systems', 'generically', 'exhibit', 'hyperbolic', 'dynamics', 'as', 'an', 'application', 'we', 'prove', 'that', 'any', 'fpu', 'chain', 'with', 'dirichlet', 'boundary', 'conditions', 'admits', 'a', 'birkhoff', 'normal', 'form', 'up', 'to', 'order', 'four', 'and', 'show', 'that', 'a', 'kam', 'theorem', 'applies']] | [-0.21453981871349276, 0.13399305618891424, -0.08197773680295967, 0.1191128429213385, -0.039365172298590934, -0.15321911078954645, -0.018988201123931438, 0.31844635469275057, -0.2916280479862466, -0.16941251930430395, 0.13596511733666952, -0.3097401282348491, -0.1849423052247511, 0.17577228919013377, -0.0101125336149622, 0.039768931964292716, 0.10162000252476491, 0.08170638025370897, -0.10436192999055627, -0.23764813553815314, 0.3185941359207649, -0.020417634893311273, 0.23186667882111095, 0.018496650467635295, 0.1221208881689321, 0.02267264035197163, 0.1000089921364817, -0.00466063243247261, -0.17738841892610713, 0.05755056281480084, 0.24073522846393902, -0.01212790033592065, 0.21266357073295486, -0.44339093499295756, -0.15271909032529646, 0.17969519156244917, 0.15044999386636762, 0.1189567303613956, -0.01826939322780647, -0.235163073856469, 0.06460197656116354, -0.15627120790678425, -0.24979701415216976, -0.11469070671057892, -0.03126642793211915, 0.05887871661219199, -0.25085977472604143, 0.04591144090988289, 0.21765791500465723, 0.05992241096127471, -0.06716763479378793, -0.05347325284580846, 0.003998995835491277, 0.05011354300509625, 0.048193224195237146, -0.0012490045826096053, 0.05223863384069089, -0.04982833324829031, -0.11019071008275272, 0.3771173191350808, -0.0759569273496884, -0.2218545400665714, 0.209339117204104, -0.14884664332750466, -0.17353981234338306, 0.12727952263224016, 0.09701154524152843, 0.07599476517237928, -0.1018668175290484, 0.1394233329877377, -0.1124397379104817, 0.1502151796693055, 0.10938519942403319, -0.04397428965777022, 0.18837909093938357, 0.15330224546151014, 0.13990807936552468, 0.1955754112221574, -0.07958707695510751, -0.17829369730102496, -0.2894884861253817, -0.18736904137981458, -0.1603306278142087, 0.10891846486649245, -0.08107038831670443, -0.25827386476304554, 0.3550746401370324, 0.12451602949003988, 0.16893581234328792, 0.10389232054489468, 0.1799241577471615, 0.13916221388974526, 0.004909795717498578, 0.09651348108496226, 0.1508392536299252, 0.11687643031179563, 0.02212910624776343, -0.24650961152542758, -0.021116307851166354, 0.10382831103484565] |
709.2625 | Search for new physics in top events with the D0 detector | This review is focused on the search for new processes, performed with top
quark events in D{\O}. It presents four updated or new D{\O} results. The two
first analyses deal with top production properties: they search for a new heavy
resonance decaying to top-antitop. The two last results concern top decay
properties: the measurement of the $W$ helicity as a probe of the $tWb$
coupling structure, and the top quark branching ratio to $Wb$. Neither of these
measurements reveal any deviation with respect to the standard model
predictions.
| hep-ex | this review is focused on the search for new processes performed with top quark events in do it presents four updated or new do results the two first analyses deal with top production properties they search for a new heavy resonance decaying to topantitop the two last results concern top decay properties the measurement of the w helicity as a probe of the twb coupling structure and the top quark branching ratio to wb neither of these measurements reveal any deviation with respect to the standard model predictions | [['this', 'review', 'is', 'focused', 'on', 'the', 'search', 'for', 'new', 'processes', 'performed', 'with', 'top', 'quark', 'events', 'in', 'do', 'it', 'presents', 'four', 'updated', 'or', 'new', 'do', 'results', 'the', 'two', 'first', 'analyses', 'deal', 'with', 'top', 'production', 'properties', 'they', 'search', 'for', 'a', 'new', 'heavy', 'resonance', 'decaying', 'to', 'topantitop', 'the', 'two', 'last', 'results', 'concern', 'top', 'decay', 'properties', 'the', 'measurement', 'of', 'the', 'w', 'helicity', 'as', 'a', 'probe', 'of', 'the', 'twb', 'coupling', 'structure', 'and', 'the', 'top', 'quark', 'branching', 'ratio', 'to', 'wb', 'neither', 'of', 'these', 'measurements', 'reveal', 'any', 'deviation', 'with', 'respect', 'to', 'the', 'standard', 'model', 'predictions']] | [-0.07667397356404267, 0.18757975324776702, -0.08155863438944587, 0.09485127638221126, -0.07945120238318024, -0.14469118503091688, 0.08577392187858508, 0.3285467791349881, -0.22441717353649437, -0.3018513024574283, 0.04526561631593557, -0.3274269637609409, -0.003553951648593118, 0.1828961411242331, 0.07702502472834154, 0.09120331631063229, 0.1363017183770849, 0.02945385340717621, -0.07241652682767546, -0.2164900489828638, 0.2980822228524961, 0.00802728849124502, 0.2560523357242346, 0.08756615560163152, 0.009143419457938184, 0.012273823948238383, -0.12236882716255919, -0.06744052832734516, -0.11444579886103218, 0.10010181353639135, 0.11472480794261421, 0.07205942148522643, 0.17541447104304098, -0.36516779553229833, -0.1151780699623156, 0.10808952023613859, 0.11805807716551829, 0.07875621607738802, -0.11224588640801482, -0.2914745453321798, 0.11945746328274254, -0.1686389569711702, -0.08792828503117728, -0.06683941670185463, -0.03937193367164582, -0.019409476598163812, -0.30166611883760197, 0.03268152673263103, 0.013790901432829824, 0.00962994364354844, 0.026271196600811727, -0.20344998701263897, -0.03907389427133074, 0.09055329467148775, 0.0977428139422872, 0.02613830645780333, 0.1637632197658108, -0.15910630372342316, -0.22304277173349296, 0.36028731510635803, -0.1518383485910652, -0.21871338889865333, 0.21877380646765232, -0.19254468038508837, -0.19682156303050843, 0.11039317010859535, 0.25795816075564787, 0.11626646412663501, -0.2080159814907926, 0.05342858841851756, -0.011900830225468699, 0.1807996289280709, 0.02271522556706755, 0.05082807334309274, 0.2154478323804638, 0.22472278570586984, -0.00645717058267275, 0.07653701321793381, -0.10008851576607082, -0.11155822521752932, -0.36984845307465136, -0.16250108561838383, -0.06877398312446364, 0.028663941933369973, -0.021038151102567845, -0.16733536442784083, 0.4130619400318458, 0.1307181314649907, 0.2851577734003182, 0.00976483547128737, 0.28854144165631046, 0.07027420167948796, 0.09086111849650148, 0.03259979402752255, 0.3304250860528555, 0.17591563072478908, 0.15258722912668335, -0.17413578313161535, 0.10380467342276295, 0.037740326110823924] |
709.2626 | Near-Zero Modes in Superconducting Graphene | Vortices in the simplest superconducting state of graphene contain very low
energy excitations, whose existence is connected to an index theorem that
applies strictly to an approximate form of the relevant Bogoliubov-deGennes
equations. When Zeeman interactions are taken into account, the zero modes
required by the index theorem are (slightly) displaced. Thus the vortices
acquire internal structure, that plausibly supports interesting dynamical
phenomena.
| cond-mat.supr-con | vortices in the simplest superconducting state of graphene contain very low energy excitations whose existence is connected to an index theorem that applies strictly to an approximate form of the relevant bogoliubovdegennes equations when zeeman interactions are taken into account the zero modes required by the index theorem are slightly displaced thus the vortices acquire internal structure that plausibly supports interesting dynamical phenomena | [['vortices', 'in', 'the', 'simplest', 'superconducting', 'state', 'of', 'graphene', 'contain', 'very', 'low', 'energy', 'excitations', 'whose', 'existence', 'is', 'connected', 'to', 'an', 'index', 'theorem', 'that', 'applies', 'strictly', 'to', 'an', 'approximate', 'form', 'of', 'the', 'relevant', 'bogoliubovdegennes', 'equations', 'when', 'zeeman', 'interactions', 'are', 'taken', 'into', 'account', 'the', 'zero', 'modes', 'required', 'by', 'the', 'index', 'theorem', 'are', 'slightly', 'displaced', 'thus', 'the', 'vortices', 'acquire', 'internal', 'structure', 'that', 'plausibly', 'supports', 'interesting', 'dynamical', 'phenomena']] | [-0.20374649871022454, 0.24660497695061614, -0.10720287672602498, 0.11651637496256698, -0.09756130250983887, -0.1826600567160529, 0.012714428126826764, 0.29565238319928683, -0.2519102030330234, -0.287168648212202, 0.024394270620264467, -0.26325028469519957, -0.08501070029737931, 0.17856518219461634, 0.018754655909207132, -0.05379691788010181, 0.025896913959600386, 0.021145147411891864, -0.007910109882701247, -0.1923450921580846, 0.33289845823679887, -0.005381563663600929, 0.2899122622514528, 0.05285993386946973, 0.04636220437555855, -0.02182276104022527, 0.05990698238805173, 0.03203833953196567, -0.10894960713584811, 0.07310611741351229, 0.2561720993428949, -0.011460004137858512, 0.20952590295882334, -0.48550061736669803, -0.18965178240268005, 0.09189450915252405, 0.17284171293593115, 0.10888689185773569, -0.022303258911484762, -0.28958220231450266, 0.06578551646735933, -0.12074740518194933, -0.22257288495847394, -0.1063170296006969, 0.018423358392384317, -0.03319863023029433, -0.23457199133773673, 0.10755635768411652, 0.11436218668712259, -0.008710630666760226, -0.11535078950876755, -0.09150126678056068, -0.11657563517136234, 0.07626934017522245, 0.03263209793450577, -0.013128085010167625, 0.10587734813683682, -0.14013091260419477, -0.09095898210736257, 0.3652425045517111, -0.01977281333575587, -0.19813018289232065, 0.15911295627140337, -0.10090750766112395, -0.10003527893965679, 0.22815986832101193, 0.11353399772067657, 0.06963200780696102, -0.09460244975112829, 0.07762004964705926, -0.041347094323663486, 0.1792975102019097, 0.057007422271583764, 0.11442000089242818, 0.27469547474775313, 0.10960075041530506, 0.06847754755013045, 0.14684642227514397, -0.0309853985802167, -0.10898418638426514, -0.2874388007358426, -0.09225722419334546, -0.19193453049021109, 0.07162641149590768, -0.06561766775502335, -0.20261001045859994, 0.37454215841855676, 0.10094569539207787, 0.1805360022089666, -0.019998117638308378, 0.26965857256529113, 0.16480927751030003, 0.10332946394318862, 0.07728444601571749, 0.2495599827389159, 0.20894819646260687, 0.0644073945928424, -0.22803524097368594, 0.0008903667182912902, 0.06046728388820258] |
709.2627 | Non-circular semiconductor nanorings of type I and II: Emission kinetics
in the exciton Aharonov-Bohm effect | Transition energies and oscillator strengths of excitons in dependence on
magnetic field are investigated in type I and II semiconductor nanorings. A
slight deviation from circular (concentric) shape of the type II nanoring gives
a better observability of the Aharonov-Bohm oscillations since the ground state
is always optically active. Kinetic equations for the exciton occupation are
solved with acoustic phonon scattering as the major relaxation process, and
absorption and luminescence spectra are calculated showing deviations from
equilibrium. The presence of a non-radiative exciton decay leads to a quenching
of the integrated photoluminescence with magnetic field.
| cond-mat.mes-hall | transition energies and oscillator strengths of excitons in dependence on magnetic field are investigated in type i and ii semiconductor nanorings a slight deviation from circular concentric shape of the type ii nanoring gives a better observability of the aharonovbohm oscillations since the ground state is always optically active kinetic equations for the exciton occupation are solved with acoustic phonon scattering as the major relaxation process and absorption and luminescence spectra are calculated showing deviations from equilibrium the presence of a nonradiative exciton decay leads to a quenching of the integrated photoluminescence with magnetic field | [['transition', 'energies', 'and', 'oscillator', 'strengths', 'of', 'excitons', 'in', 'dependence', 'on', 'magnetic', 'field', 'are', 'investigated', 'in', 'type', 'i', 'and', 'ii', 'semiconductor', 'nanorings', 'a', 'slight', 'deviation', 'from', 'circular', 'concentric', 'shape', 'of', 'the', 'type', 'ii', 'nanoring', 'gives', 'a', 'better', 'observability', 'of', 'the', 'aharonovbohm', 'oscillations', 'since', 'the', 'ground', 'state', 'is', 'always', 'optically', 'active', 'kinetic', 'equations', 'for', 'the', 'exciton', 'occupation', 'are', 'solved', 'with', 'acoustic', 'phonon', 'scattering', 'as', 'the', 'major', 'relaxation', 'process', 'and', 'absorption', 'and', 'luminescence', 'spectra', 'are', 'calculated', 'showing', 'deviations', 'from', 'equilibrium', 'the', 'presence', 'of', 'a', 'nonradiative', 'exciton', 'decay', 'leads', 'to', 'a', 'quenching', 'of', 'the', 'integrated', 'photoluminescence', 'with', 'magnetic', 'field']] | [-0.09433094980685335, 0.184801995396418, -0.028858050645182008, 0.07026003566763968, -0.011180075405067519, -0.15945665038337833, -0.0005329617090817345, 0.4226480647725494, -0.23802198378957415, -0.30511707901758583, -0.002175319283024261, -0.3073210010501115, -0.0523024662152717, 0.17152858760796094, 0.07343224997534172, -0.013256438752930415, 0.031390660344377944, -0.037506485598063785, -0.039528525713831184, -0.11953856131601098, 0.28915500610478617, 0.03536880036914035, 0.2991851465482461, 0.05913082920014858, 0.023755115966655707, -0.008718664860843044, 0.08711353201223047, 0.0338150587606881, -0.1254491812244707, 0.07940071493289189, 0.19777115070702214, -0.04180875809275006, 0.19882783243236574, -0.4356621273842297, -0.1616149917931149, 0.05830102504696697, 0.19678051060457763, 0.17792329180397484, -0.1032667809313065, -0.2939512824541644, -0.01846349047202813, -0.08524668224548039, -0.10428281517478784, -0.019133861146033986, 0.04314314621304603, 0.045573612655463974, -0.27535312609060814, 0.15277277126810268, 0.04353730828795386, 0.06096799270691056, -0.13411327265693168, -0.10534975635022611, -0.06807740929683573, 0.032312671619614486, 0.039761709426468436, -0.034135712015344516, 0.2328148291715862, -0.10942840077669212, -0.13953505048626347, 0.3637090135904911, -0.11803114990654745, -0.06529217771205463, 0.1332750027313044, -0.19259532086159054, -0.014679076958839831, 0.24622246718132182, 0.10635541151032636, 0.07844202149855463, -0.11673108489301644, 0.07318182706979937, 0.027226481047507963, 0.15680951382719766, 0.05090612868631356, 0.10968508963522158, 0.24430035092916927, 0.17003217587051422, 0.021785845107545977, 0.12288220595372351, -0.1484755145557421, -0.09188424756407346, -0.2763319828351469, -0.13558088389078254, -0.18627327804110552, 0.15139641404691104, -0.036801783352673645, -0.20503459986495345, 0.42519595643603486, 0.05667215496497719, 0.1886115833577749, -0.0007155660245763628, 0.2513100986466988, 0.17696801798296005, 0.046008112173723546, 0.022757923410666223, 0.3368485880721557, 0.23676748077238077, 0.13071461749802293, -0.34930758341950807, 0.025879161128480183, -0.008580464575635759] |
709.2628 | Isothermal Plasma Waves in Gravitomagnetic Planar Analogue | We investigate the wave properties of the Kerr black hole with isothermal
plasma using 3+1 ADM formalism. The corresponding Fourier analyzed perturbed
GRMHD equations are used to obtain the dispersion relations. These relations
lead to the real values of the components of wave vector $\textbf{k}$ which are
used to evaluate the quantities like phase and group velocities etc. These have
been discussed graphically in the neighborhood of the pair production region.
The results obtained verify the conclusion of Mackay et al. according to which
rotation of a black hole is required for negative phase velocity propagation.
| gr-qc astro-ph | we investigate the wave properties of the kerr black hole with isothermal plasma using 31 adm formalism the corresponding fourier analyzed perturbed grmhd equations are used to obtain the dispersion relations these relations lead to the real values of the components of wave vector textbfk which are used to evaluate the quantities like phase and group velocities etc these have been discussed graphically in the neighborhood of the pair production region the results obtained verify the conclusion of mackay et al according to which rotation of a black hole is required for negative phase velocity propagation | [['we', 'investigate', 'the', 'wave', 'properties', 'of', 'the', 'kerr', 'black', 'hole', 'with', 'isothermal', 'plasma', 'using', '31', 'adm', 'formalism', 'the', 'corresponding', 'fourier', 'analyzed', 'perturbed', 'grmhd', 'equations', 'are', 'used', 'to', 'obtain', 'the', 'dispersion', 'relations', 'these', 'relations', 'lead', 'to', 'the', 'real', 'values', 'of', 'the', 'components', 'of', 'wave', 'vector', 'textbfk', 'which', 'are', 'used', 'to', 'evaluate', 'the', 'quantities', 'like', 'phase', 'and', 'group', 'velocities', 'etc', 'these', 'have', 'been', 'discussed', 'graphically', 'in', 'the', 'neighborhood', 'of', 'the', 'pair', 'production', 'region', 'the', 'results', 'obtained', 'verify', 'the', 'conclusion', 'of', 'mackay', 'et', 'al', 'according', 'to', 'which', 'rotation', 'of', 'a', 'black', 'hole', 'is', 'required', 'for', 'negative', 'phase', 'velocity', 'propagation']] | [-0.13483281033586536, 0.09641176111836103, -0.09016988274136868, 0.0812951751346797, -0.09276490623354523, -0.05580335943280564, -0.014297398510583056, 0.33435548779865104, -0.20293686200360148, -0.3110319451467755, 0.0792427942045227, -0.2887954590163038, -0.10824900363271202, 0.2316158474617017, 0.00784423303866788, 0.10748546485547195, -0.008933944768311145, 0.03657678891613614, -0.10325084022042574, -0.22335258578580883, 0.3458347059689307, 0.03744599602456825, 0.26835805949910235, -0.03350966446729823, 0.0844358255926636, -0.015266191546591775, -0.04724306336417309, 0.057758322326890266, -0.1791583569085257, 0.06058650591876358, 0.19412759883319572, 0.10157209405345687, 0.16220333178838095, -0.4004177675524261, -0.2344263933870631, 0.040567648820191, 0.1302180491378143, 0.10518449889787007, -0.06261575209888785, -0.30884791443046805, 0.08300874193082564, -0.19255966005827455, -0.1869100843226382, -0.07546591123476294, 0.04462542564336521, 0.0484134173845329, -0.2307265340447581, 0.10824916892064114, 0.030407145803716656, -0.02150486528747327, -0.0945939661784602, -0.09640462774162491, -0.09463745532169317, 0.10193517699857087, 0.07648740697671504, 0.001839640016745155, 0.13573303149799662, -0.0453915739895668, -0.08407606782081227, 0.3904063575124989, -0.05620404974130603, -0.20789088409704468, 0.17127945962905264, -0.20335105769815223, -0.06831017425671841, 0.10590379186517869, 0.18931061034284843, 0.12883521172382947, -0.14457882565329783, 0.044957204755216175, -0.015676346741808327, 0.13063101861189352, 0.11956005143777777, 0.026586243189134013, 0.24905910570911752, 0.040476117273404576, -0.05502383261599183, 0.1265140946028017, -0.11290449048829032, -0.09206337259881063, -0.2861236155149527, -0.1629403714999853, -0.13177104350082422, 0.008402607860565089, -0.11311170571313293, -0.16366897948076561, 0.362143404740588, 0.1563747485051863, 0.20773044990104003, -0.004108351735339966, 0.22869134352852902, 0.16702759017546973, 0.020572607560704153, 0.11832505768203798, 0.3372841703821905, 0.21344518983581415, 0.14155163602360213, -0.24406173896568362, 0.007205758515434961, 0.10850411877375639] |
709.2629 | Model-independent WIMP Searches at the ILC | We investigate the possibility to detect WIMPs at the ILC in a
model-independent way using events with single photons. The study is done with
a full detector simulation of the LDC detector and MarlinReco. It turns out
that WIMPs are observable this way at the ILC if their coupling to electrons is
not too small. Beam polarisation can increase the accessible phase space
significantly.
| hep-ex | we investigate the possibility to detect wimps at the ilc in a modelindependent way using events with single photons the study is done with a full detector simulation of the ldc detector and marlinreco it turns out that wimps are observable this way at the ilc if their coupling to electrons is not too small beam polarisation can increase the accessible phase space significantly | [['we', 'investigate', 'the', 'possibility', 'to', 'detect', 'wimps', 'at', 'the', 'ilc', 'in', 'a', 'modelindependent', 'way', 'using', 'events', 'with', 'single', 'photons', 'the', 'study', 'is', 'done', 'with', 'a', 'full', 'detector', 'simulation', 'of', 'the', 'ldc', 'detector', 'and', 'marlinreco', 'it', 'turns', 'out', 'that', 'wimps', 'are', 'observable', 'this', 'way', 'at', 'the', 'ilc', 'if', 'their', 'coupling', 'to', 'electrons', 'is', 'not', 'too', 'small', 'beam', 'polarisation', 'can', 'increase', 'the', 'accessible', 'phase', 'space', 'significantly']] | [-0.08692186083025595, 0.19790459750959324, -0.11757555323105956, 0.09718181616589723, -0.06539520828260316, -0.13421100114900913, 0.04140796625454511, 0.3993068010442787, -0.2617614630846277, -0.3214227863779617, 0.03457741581073533, -0.35033189737430165, -0.02046806737780571, 0.19036075438091915, 0.05752652122210416, 0.03059649606427503, 0.10431592194511304, -0.00530315518734001, -0.06935803013824163, -0.2359439091875203, 0.24334896379520024, 0.1848062337006605, 0.22112222845178275, 0.034266430204586376, 0.1375922177962604, -0.0067683290320611185, -0.02469852850550697, -0.008530961638334991, -0.06376547172412901, 0.04338884070729985, 0.27249854801237466, 0.08842082114683257, 0.16560408263097678, -0.36836731457521044, -0.1671166524202341, 0.19229725797084116, 0.16399297880614916, 0.11718055030833634, -0.04605398773001359, -0.3090065759976232, 0.08451727935157362, -0.185692309165403, -0.1183595723723845, -0.06728985881994641, -0.03950843679171706, -0.06904063251475612, -0.2398809246083219, 0.008723660704812832, -0.02154649779318817, -0.02234135584403125, 0.06047428638807365, -0.0579310403249803, -0.00848545871734146, 0.03231567043870214, 0.03158470032189692, 0.04585764179050568, 0.2087429561800072, -0.11785620554823369, -0.07036505500963401, 0.38739460706710815, -0.06730753422847816, -0.2003383580299597, 0.20944455876902102, -0.2570242647022482, -0.09063109471684411, 0.1750240121036768, 0.19373148830518835, 0.1085296379668372, -0.1810515888833574, 0.08362565257508929, -0.0026040918356369414, 0.20737963369382278, 0.05301351440952174, 0.025441107657989338, 0.2922437870431514, 0.2326308535411954, 0.08972840154513953, 0.1294408319665799, -0.13043354845251, 0.006330320859209649, -0.36293336160717504, -0.11491172874922909, -0.12224063055501097, 0.011395301939854916, 0.004462138106833981, -0.05651066917926073, 0.3563704403664266, 0.17720033428705637, 0.19248550487238736, 0.012152698556227344, 0.328166027627294, 0.0862487086080133, 0.09326957887230766, 0.02234710014558264, 0.3585512103838107, 0.07428750265685338, 0.10532264786935042, -0.20085328005786454, 0.05614211514873046, -0.03811685026194605] |
709.263 | Evolution of community structure in the world trade web | In this note we study the bilateral merchandise trade flows between 186
countries over the 1948-2005 period using data from the International Monetary
Fund. We use Pajek to identify network structure and behavior across thresholds
and over time. In particular, we focus on the evolution of trade "islands" in
the a world trade network in which countries are linked with directed edges
weighted according to fraction of total dollars sent from one country to
another. We find mixed evidence for globalization.
| q-fin.GN physics.soc-ph | in this note we study the bilateral merchandise trade flows between 186 countries over the 19482005 period using data from the international monetary fund we use pajek to identify network structure and behavior across thresholds and over time in particular we focus on the evolution of trade islands in the a world trade network in which countries are linked with directed edges weighted according to fraction of total dollars sent from one country to another we find mixed evidence for globalization | [['in', 'this', 'note', 'we', 'study', 'the', 'bilateral', 'merchandise', 'trade', 'flows', 'between', '186', 'countries', 'over', 'the', '19482005', 'period', 'using', 'data', 'from', 'the', 'international', 'monetary', 'fund', 'we', 'use', 'pajek', 'to', 'identify', 'network', 'structure', 'and', 'behavior', 'across', 'thresholds', 'and', 'over', 'time', 'in', 'particular', 'we', 'focus', 'on', 'the', 'evolution', 'of', 'trade', 'islands', 'in', 'the', 'a', 'world', 'trade', 'network', 'in', 'which', 'countries', 'are', 'linked', 'with', 'directed', 'edges', 'weighted', 'according', 'to', 'fraction', 'of', 'total', 'dollars', 'sent', 'from', 'one', 'country', 'to', 'another', 'we', 'find', 'mixed', 'evidence', 'for', 'globalization']] | [-0.09937800915795378, 0.06601698419544846, -0.07733946535736322, 0.07751353054045466, -0.05126110803103075, -0.07006828844350821, 0.16262492809910328, 0.39252054248936474, -0.29337017923826353, -0.3083845462766476, 0.11119480197667145, -0.35373910488560795, -0.14787939267698674, 0.16345082276966422, -0.10937077480484732, -0.05769668674693094, 0.0729084579506889, 0.027539957629051058, 0.02787165717509197, -0.28889123287226537, 0.3203303303802386, 0.04764461977756582, 0.31377321551553905, 0.0533886525008711, 0.0718791885432438, 0.006520094239385798, -0.10461765630207083, 0.0008225995282373332, -0.12799921978148632, 0.16007319134660064, 0.320683163285139, 0.14990885618026367, 0.33046545114193576, -0.4665426601655781, -0.11990872989408671, 0.14960161754279397, 0.060463843197248936, 0.028698881807213184, 0.06292176255228696, -0.25647846549982206, 0.033892916014883666, -0.26697936074342576, -0.07749663377180696, -0.004846888876636512, 0.046648353314958514, 0.02898356241057627, -0.2070974740177917, 0.04962497156811878, -0.05102756486448925, 0.10136900487123057, -0.047640164085896684, -0.06674884792009834, -0.072992058028467, 0.20261273191426882, 0.09033430067356676, -0.03001612329680938, 0.10188763191108592, -0.10030289073183667, -0.15340524958446622, 0.330010990658775, -0.06621543390210718, -0.11372321280650795, 0.14255413883365692, -0.17658384337555616, -0.13401423459290526, 0.05672214824880939, 0.29257266652421093, 0.01664406170602888, -0.13201611287731793, -0.0009028001120896078, -0.06890084188198671, 0.17157288077287375, 0.13524897284223697, -0.04166069271741435, 0.19281576117500662, 0.17342162609274964, 0.1453991601621965, 0.14356275123427623, -0.085780065387371, -0.1828001196612604, -0.22602252250071614, -0.13242696879897267, -0.09664590961183421, 0.032836569426581266, -0.10022367358869815, -0.12871956163435244, 0.41708772499114277, 0.10945976426592097, 0.18025012768339366, 0.07274994576982863, 0.20758960514795036, 0.009009926770522725, 0.10781191146761557, 0.15737657800782473, 0.18208854721160606, 0.02224920141743496, 0.18498080473073059, -0.14212670236011035, 0.11959641909925267, 0.011161929089576006] |
709.2631 | Magnetic properties of two-phase superconductors | We have recently proposed a theoretical model for superconductors endowed
with two distinct superconducting phases, described by two scalar order
parameters which condensate at different critical temperatures. On analyzing
the magnetic behavior of such systems, we have found some observable
differences with respect to the case of ordinary Ginzburg-Landau
superconductors. In particular, at low temperature the London penetration
length is strongly reduced and the Ginzburg-Landau parameter k becomes a
function of temperature. By contrast, in the temperature region between the two
phase transitions k is constant and the system is a type-I or a type-II
superconductor depending on the ratio between the critical temperatures.
| cond-mat.supr-con hep-ph | we have recently proposed a theoretical model for superconductors endowed with two distinct superconducting phases described by two scalar order parameters which condensate at different critical temperatures on analyzing the magnetic behavior of such systems we have found some observable differences with respect to the case of ordinary ginzburglandau superconductors in particular at low temperature the london penetration length is strongly reduced and the ginzburglandau parameter k becomes a function of temperature by contrast in the temperature region between the two phase transitions k is constant and the system is a typei or a typeii superconductor depending on the ratio between the critical temperatures | [['we', 'have', 'recently', 'proposed', 'a', 'theoretical', 'model', 'for', 'superconductors', 'endowed', 'with', 'two', 'distinct', 'superconducting', 'phases', 'described', 'by', 'two', 'scalar', 'order', 'parameters', 'which', 'condensate', 'at', 'different', 'critical', 'temperatures', 'on', 'analyzing', 'the', 'magnetic', 'behavior', 'of', 'such', 'systems', 'we', 'have', 'found', 'some', 'observable', 'differences', 'with', 'respect', 'to', 'the', 'case', 'of', 'ordinary', 'ginzburglandau', 'superconductors', 'in', 'particular', 'at', 'low', 'temperature', 'the', 'london', 'penetration', 'length', 'is', 'strongly', 'reduced', 'and', 'the', 'ginzburglandau', 'parameter', 'k', 'becomes', 'a', 'function', 'of', 'temperature', 'by', 'contrast', 'in', 'the', 'temperature', 'region', 'between', 'the', 'two', 'phase', 'transitions', 'k', 'is', 'constant', 'and', 'the', 'system', 'is', 'a', 'typei', 'or', 'a', 'typeii', 'superconductor', 'depending', 'on', 'the', 'ratio', 'between', 'the', 'critical', 'temperatures']] | [-0.20864479935083252, 0.23904591070738837, -0.03521464006581272, 0.021761477529742897, -0.023652398862535708, -0.1696789443063048, 0.07723580286032163, 0.3378259445576427, -0.20936375466855958, -0.3089525611033493, 0.044806051665755846, -0.3333229738144347, -0.08382438559111996, 0.18885814912097815, 0.0623983703662816, 0.022671571807362713, -0.11132327958386248, 0.07121906615905643, -0.12587728163299078, -0.2175966126199525, 0.3843548647396696, -0.015908737398254182, 0.32554051189575917, 0.0541851073772145, 0.0431806614987391, -0.0735527602082584, 0.11533012026652265, 0.08999331627721684, -0.18250479520961213, 0.006257636744591694, 0.2367016160636782, -0.05445835439380831, 0.19857409589279157, -0.3818410218764956, -0.2657856011154273, 0.10868738241529521, 0.10963816661387682, 0.07248462250236816, -0.006037562349005244, -0.24739131610616683, 0.05273522039911208, -0.11334160779034182, -0.11232879399680175, -0.05155142100277142, 0.023589299602183297, -0.002624543171035699, -0.2604214971473154, 0.08910696308773297, -0.0014595203437448407, 0.11340958617242555, -0.07003826613520057, -0.13510132612002332, -0.028811289799005654, 0.0234859763586428, 0.06197923041383127, 0.041455203644895494, 0.09739617621436572, -0.13429952330457476, -0.04610955726037411, 0.33565903573225325, -0.08336058318449292, -0.10240676558504884, 0.19743491085067105, -0.1474253117945549, -0.06125026268329328, 0.13992121938589172, 0.1244501074990974, 0.09761701338440897, -0.11637232920083289, 0.08606982249868732, -0.001042881729797675, 0.17200344673787746, 0.03143202293610487, 0.04762689861952542, 0.26089691356397593, 0.2135224232042674, -0.0010399435458776469, 0.1397146108613994, -0.0954566248647797, -0.09946274590597917, -0.27535812254063785, -0.13977628614968404, -0.1798010907805292, -0.005446157733856056, -0.11941351091081742, -0.1603709420440002, 0.38271734154281706, 0.15838418546683478, 0.2451829965083072, -0.013364749388599124, 0.23964609757352334, 0.17296895005095464, 0.04647213089181325, 0.057313772827351034, 0.24206335176047736, 0.14522922633085938, 0.12831255598855654, -0.2945174034640121, 0.0720592446383447, 0.04800872747392322] |
709.2632 | Nonrelativistic Lee model in three dimensional Riemannian manifolds | In this work, we construct the non-relativistic Lee model on some class of
three dimensional Riemannian manifolds by following a novel approach introduced
by S. G. Rajeev hep-th/9902025. This approach together with the help of heat
kernel allows us to perform the renormalization non-perturbatively and
explicitly. For completeness, we show that the ground state energy is bounded
from below for different classes of manifolds, using the upper bound estimates
on the heat kernel. Finally, we apply a kind of mean field approximation to the
model for compact and non-compact manifolds separately and discover that the
ground state energy grows linearly with the number of bosons n.
| hep-th | in this work we construct the nonrelativistic lee model on some class of three dimensional riemannian manifolds by following a novel approach introduced by s g rajeev hepth9902025 this approach together with the help of heat kernel allows us to perform the renormalization nonperturbatively and explicitly for completeness we show that the ground state energy is bounded from below for different classes of manifolds using the upper bound estimates on the heat kernel finally we apply a kind of mean field approximation to the model for compact and noncompact manifolds separately and discover that the ground state energy grows linearly with the number of bosons n | [['in', 'this', 'work', 'we', 'construct', 'the', 'nonrelativistic', 'lee', 'model', 'on', 'some', 'class', 'of', 'three', 'dimensional', 'riemannian', 'manifolds', 'by', 'following', 'a', 'novel', 'approach', 'introduced', 'by', 's', 'g', 'rajeev', 'hepth9902025', 'this', 'approach', 'together', 'with', 'the', 'help', 'of', 'heat', 'kernel', 'allows', 'us', 'to', 'perform', 'the', 'renormalization', 'nonperturbatively', 'and', 'explicitly', 'for', 'completeness', 'we', 'show', 'that', 'the', 'ground', 'state', 'energy', 'is', 'bounded', 'from', 'below', 'for', 'different', 'classes', 'of', 'manifolds', 'using', 'the', 'upper', 'bound', 'estimates', 'on', 'the', 'heat', 'kernel', 'finally', 'we', 'apply', 'a', 'kind', 'of', 'mean', 'field', 'approximation', 'to', 'the', 'model', 'for', 'compact', 'and', 'noncompact', 'manifolds', 'separately', 'and', 'discover', 'that', 'the', 'ground', 'state', 'energy', 'grows', 'linearly', 'with', 'the', 'number', 'of', 'bosons', 'n']] | [-0.08350059890321322, 0.13539721136469215, -0.06983207564002701, 0.07496446712009076, -0.07515108569835623, -0.1308941852035267, 0.0644339830525929, 0.35773984716229495, -0.224130469396533, -0.3121959186070377, 0.08158690050976085, -0.2829710515062158, -0.10963670595194258, 0.20000815721051324, -0.029356471336047563, 0.05863067994692496, 0.06118311542308047, 0.09297057728150061, -0.08561044966890699, -0.24653114098168555, 0.4401641969968166, 0.005800422573728221, 0.24383767076901028, 0.06702455503400415, 0.10892636299221999, -0.010605210078037566, 0.006134292822597282, 0.024951481894545612, -0.1665832002166315, 0.14461242423858495, 0.19942513305826912, 0.04968901728058145, 0.24424439803475426, -0.39402424207045916, -0.22599873976515872, 0.1284483103347676, 0.0965112671876947, 0.09023122010486466, -0.0029090815002009982, -0.2997006414812945, 0.0655665245117797, -0.15734671286440322, -0.15803655715925352, -0.13420399949841555, -0.018567672499366816, -0.004686579746859414, -0.2477618123360333, 0.05451886797146428, 0.08448263412518871, -0.00701392496121116, -0.10170407573348798, -0.12278366633247406, -0.004373957119172527, 0.09581458693192828, 0.01249933143456777, 0.05365702096550237, 0.049424703308336794, -0.09581308161397742, -0.09320769144632365, 0.29299916373122303, -0.1363502508766639, -0.24661941272871835, 0.16956050498854547, -0.10163275994183052, -0.14896762313853418, 0.10525880300750336, 0.18726912522023278, 0.15880953502796946, -0.12352264350989745, 0.14818470760836222, -0.057212796372671924, 0.11763989636674524, 0.031108239160052367, -0.002401972841471434, 0.1107421862538017, 0.13228824380119997, 0.10914236895207848, 0.16800022276473187, -0.082962299089524, -0.0824332608797011, -0.3371657229605175, -0.1802016169703122, -0.19310214400646233, 0.09898829924918356, -0.09057175790228593, -0.132794422815953, 0.40398856855574106, 0.13245193425820964, 0.20808493717617932, 0.11788783000249947, 0.24903196785820736, 0.10083124640929912, 0.014878874498286418, 0.13678643428720533, 0.18131008080478447, 0.17437173085996793, 0.04944028395361134, -0.21686236033703954, -0.05136181725898669, 0.15297750173666005] |
709.2633 | Polar supermultiplets, Hermitian symmetric spaces and hyperkahler
metrics | We address the construction of four-dimensional N=2 supersymmetric nonlinear
sigma models on tangent bundles of arbitrary Hermitian symmetric spaces
starting from projective superspace. Using a systematic way of solving the
(infinite number of) auxiliary field equations along with the requirement of
supersymmetry, we are able to derive a closed form for the Lagrangian on the
tangent bundle and to dualize it to give the hyperkahler potential on the
cotangent bundle. As an application, the case of the exceptional symmetric
space E_6/SO(10) \times U(1) is explicitly worked out for the first time.
| hep-th | we address the construction of fourdimensional n2 supersymmetric nonlinear sigma models on tangent bundles of arbitrary hermitian symmetric spaces starting from projective superspace using a systematic way of solving the infinite number of auxiliary field equations along with the requirement of supersymmetry we are able to derive a closed form for the lagrangian on the tangent bundle and to dualize it to give the hyperkahler potential on the cotangent bundle as an application the case of the exceptional symmetric space e_6so10 times u1 is explicitly worked out for the first time | [['we', 'address', 'the', 'construction', 'of', 'fourdimensional', 'n2', 'supersymmetric', 'nonlinear', 'sigma', 'models', 'on', 'tangent', 'bundles', 'of', 'arbitrary', 'hermitian', 'symmetric', 'spaces', 'starting', 'from', 'projective', 'superspace', 'using', 'a', 'systematic', 'way', 'of', 'solving', 'the', 'infinite', 'number', 'of', 'auxiliary', 'field', 'equations', 'along', 'with', 'the', 'requirement', 'of', 'supersymmetry', 'we', 'are', 'able', 'to', 'derive', 'a', 'closed', 'form', 'for', 'the', 'lagrangian', 'on', 'the', 'tangent', 'bundle', 'and', 'to', 'dualize', 'it', 'to', 'give', 'the', 'hyperkahler', 'potential', 'on', 'the', 'cotangent', 'bundle', 'as', 'an', 'application', 'the', 'case', 'of', 'the', 'exceptional', 'symmetric', 'space', 'e_6so10', 'times', 'u1', 'is', 'explicitly', 'worked', 'out', 'for', 'the', 'first', 'time']] | [-0.16465250134675039, 0.0661543281989806, -0.02645549387153652, 0.06069550113623134, -0.13263686048901743, -0.13352716931452355, -0.02275729433943828, 0.35342868979399406, -0.20989558543337303, -0.21515869665890933, 0.11471110396345871, -0.2298091550823301, -0.1639358779725929, 0.14856065667182622, -0.07122297323205405, 0.04024749814222257, -0.010474684194196015, 0.10671113638931679, -0.15891832544261383, -0.28237472766648153, 0.41519352668482395, -0.001361140613961551, 0.22461447055555053, 0.01621972291937305, 0.19285374762904312, 0.019160552732905164, 0.009474400590018679, -0.03259188486812895, -0.11021947312789658, 0.1248126316233538, 0.2584425471611919, 0.0778898692327655, 0.139138608922561, -0.4534715776435203, -0.1683995749927514, 0.16977358559767405, 0.14269580634103882, 0.07598025916765133, 0.0028493216998564702, -0.2983551054546196, 0.021017130479837456, -0.11727012270647619, -0.20459067898078098, -0.11477771014389064, 0.021799952532940856, -0.053852146284447774, -0.22586710036007895, -0.022022993779844707, 0.03716525284366475, 0.0780203765982555, -0.08857270338986482, -0.07303184621398234, -0.0999473385616309, 0.04751562832647727, 0.056133174611669445, 0.06587721521759199, 0.11641771173001164, -0.0850901484929232, -0.10270778626371692, 0.4063979712004463, -0.09034149090035094, -0.31169158791502316, 0.06739649414860954, -0.08328996359099013, -0.15553838811918266, 0.15989465390642485, 0.15613379432923263, 0.1923391260827581, -0.06353868804354634, 0.21025598799331216, -0.09328650548122823, 0.06529975970948322, 0.0704067456911111, -0.033401245440149475, 0.18022773487545135, 0.11274641582535373, 0.09924508563967215, 0.1338386899481217, -0.020012790919281542, -0.15646388876549383, -0.44550487570878533, -0.22265737509232067, -0.08780490926777323, 0.19038872449762292, -0.12316005521360138, -0.14912872737428795, 0.4043669036304992, 0.0873650803644624, 0.21151009154143846, 0.11515062342190908, 0.23800184403856595, 0.10022711375689444, 0.06139727593399584, 0.01628212395331098, 0.19676402260859807, 0.20453468581868542, 0.02484470762622853, -0.1664522553819956, -0.12437035934999585, 0.1775184062620004] |
709.2634 | Entropy production by Q-ball decay for diluting long-lived charged
particles | The cosmic abundance of a long-lived charged particle such as a stau is
tightly constrained by the catalyzed big bang nucleosynthesis. One of the ways
to evade the constraints is to dilute those particles by a huge entropy
production. We evaluate the dilution factor in a case that non-relativistic
matter dominates the energy density of the universe and decays with large
entropy production. We find that large Q balls can do the job, which is
naturally produced in the gauge-mediated supersymmetry breaking scenario.
| hep-ph astro-ph | the cosmic abundance of a longlived charged particle such as a stau is tightly constrained by the catalyzed big bang nucleosynthesis one of the ways to evade the constraints is to dilute those particles by a huge entropy production we evaluate the dilution factor in a case that nonrelativistic matter dominates the energy density of the universe and decays with large entropy production we find that large q balls can do the job which is naturally produced in the gaugemediated supersymmetry breaking scenario | [['the', 'cosmic', 'abundance', 'of', 'a', 'longlived', 'charged', 'particle', 'such', 'as', 'a', 'stau', 'is', 'tightly', 'constrained', 'by', 'the', 'catalyzed', 'big', 'bang', 'nucleosynthesis', 'one', 'of', 'the', 'ways', 'to', 'evade', 'the', 'constraints', 'is', 'to', 'dilute', 'those', 'particles', 'by', 'a', 'huge', 'entropy', 'production', 'we', 'evaluate', 'the', 'dilution', 'factor', 'in', 'a', 'case', 'that', 'nonrelativistic', 'matter', 'dominates', 'the', 'energy', 'density', 'of', 'the', 'universe', 'and', 'decays', 'with', 'large', 'entropy', 'production', 'we', 'find', 'that', 'large', 'q', 'balls', 'can', 'do', 'the', 'job', 'which', 'is', 'naturally', 'produced', 'in', 'the', 'gaugemediated', 'supersymmetry', 'breaking', 'scenario']] | [-0.10772173735874155, 0.28524951514485014, -0.050440588881856346, 0.15633685495115324, -0.03148721113200692, -0.10855032219719815, -0.009247941002866859, 0.2419960417150778, -0.25821276240230323, -0.3235127221363743, 0.03651708989763206, -0.32739211355212583, 0.02768709809036858, 0.10133541051399367, -0.0260367665765246, 0.02876485165921096, 0.06420748883715259, 0.03828755143962531, -0.00022194806643458735, -0.2632888282189168, 0.3248103316368378, 0.08149260953517563, 0.2128330549415964, 0.09548196132597794, 0.027356757877776063, -0.05466836865104915, 0.01793955735082413, 0.009807197012411183, -0.1468822847084347, 0.08362650073200734, 0.17448574396029834, 0.1652196616394423, 0.169423682794693, -0.4228197642972311, -0.22486988469644123, 0.2443913960750832, 0.18051274823226843, 0.12815540310146892, -0.1272891346331551, -0.25209285296129447, 0.0670735634840935, -0.2134882169719561, -0.09469036302383406, -0.03502685249592346, -0.0011682784723409687, -0.05057125917288015, -0.28932385551126066, 0.12331447578652437, -0.027523225467197644, -0.0980899981166943, -0.012598123867064714, -0.05121556339583483, -0.056428141398243155, -0.012061670848942664, 0.1530032059856612, 0.005762564439146993, 0.25352300783753934, -0.18045636652104474, -0.0908181292849245, 0.44286573085799275, -0.13547871243320855, -0.10707010247419219, 0.18371399254145393, -0.15780605487974295, -0.1965765111395214, 0.14122493812780693, 0.16276206574206387, 0.12969240896314024, -0.1534146019538124, 0.14980546718236082, -0.009159987765723413, 0.1607143027001027, 0.07766010219522987, 0.015201091042618794, 0.2908941230860101, 0.2100699717986835, 0.03853890170197351, 0.08559438503201468, -0.06571230001702726, -0.11612384895939963, -0.34680606157754557, -0.18052563231707697, -0.14540150416005088, 0.07596852465291475, -0.11590023062185592, -0.12832815137254186, 0.31976101267942597, 0.06159018724595746, 0.2689578049333699, 0.011932059921918953, 0.31530805978452764, 0.0821014347932223, 0.08645917662329612, 0.07496197920584355, 0.29178636862211915, 0.08702180036399738, 0.1074490292244647, -0.24221094044104938, 0.033725273397089126, 0.0303525331174865] |
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