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707.123
|
Exploring the Protein G Helix Free Energy Surface by Solute Tempering
Metadynamics
|
The free-energy landscape of the alpha-helix of protein G is studied by means
of metadynamics coupled with a solute tempering algorithm. Metadynamics allows
to overcome large energy barriers, whereas solute tempering improves the
sampling with an affordable computational effort. From the sampled free-energy
surface we are able to reproduce a number of experimental observations, such as
the fact that the lowest minimum corresponds to a globular conformation
displaying some degree of beta-structure, that the helical state is metastable
and involves only 65% of the chain. The calculations also show that the system
populates consistently a pi-helix state and that the hydrophobic staple motif
is present only in the free-energy minimum associated with the helices, and
contributes to their stabilization. The use of metadynamics coupled with solute
tempering results then particularly suitable to provide the thermodynamics of a
short peptide, and its computational efficiency is promising to deal with
larger proteins.
|
q-bio.BM
|
the freeenergy landscape of the alphahelix of protein g is studied by means of metadynamics coupled with a solute tempering algorithm metadynamics allows to overcome large energy barriers whereas solute tempering improves the sampling with an affordable computational effort from the sampled freeenergy surface we are able to reproduce a number of experimental observations such as the fact that the lowest minimum corresponds to a globular conformation displaying some degree of betastructure that the helical state is metastable and involves only 65 of the chain the calculations also show that the system populates consistently a pihelix state and that the hydrophobic staple motif is present only in the freeenergy minimum associated with the helices and contributes to their stabilization the use of metadynamics coupled with solute tempering results then particularly suitable to provide the thermodynamics of a short peptide and its computational efficiency is promising to deal with larger proteins
|
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|
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|
707.1231
|
A Robertson-type Uncertainty Principle and Quantum Fisher Information
|
Let $A_1,...,A_N$ be complex selfadjoint matrices and let $\rho$ be a density
matrix. The Robertson uncertainty principle $$ det (Cov_\rho(A_h,A_j)) \geq det
(- \frac{i}{2} Tr (\rho [A_h,A_j])) $$ gives a bound for the quantum
generalized covariance in terms of the commutators $ [A_h,A_j]$. The right side
matrix is antisymmetric and therefore the bound is trivial (equal to zero) in
the odd case $N=2m+1$.
Let $f$ be an arbitrary normalized symmetric operator monotone function and
let $<\cdot, \cdot >_{\rho,f}$ be the associated quantum Fisher information. In
this paper we prove the inequality $$ det (Cov_\rho (A_h,A_j)) \geq det
(\frac{f(0)}{2} < i[\rho, A_h],i[\rho,A_j] >_{\rho,f}) $$ that gives a
non-trivial bound for any $N \in {\mathbb N}$ using the commutators
$[\rho,A_h]$.
|
math-ph math.MP math.ST stat.TH
|
let a_1a_n be complex selfadjoint matrices and let rho be a density matrix the robertson uncertainty principle det cov_rhoa_ha_j geq det fraci2 tr rho a_ha_j gives a bound for the quantum generalized covariance in terms of the commutators a_ha_j the right side matrix is antisymmetric and therefore the bound is trivial equal to zero in the odd case n2m1 let f be an arbitrary normalized symmetric operator monotone function and let cdot cdot _rhof be the associated quantum fisher information in this paper we prove the inequality det cov_rho a_ha_j geq det fracf02 irho a_hirhoa_j _rhof that gives a nontrivial bound for any n in mathbb n using the commutators rhoa_h
|
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|
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|
707.1232
|
Magnetic properties of G-band bright points in a sunspot moat
|
We present simultaneous spectropolarimetric observations of four visible and
three infrared spectral lines from the VTT (Tenerife), together with
speckle-reconstructed filtergrams in the G band and the CaII H line core from
the DOT (La Palma). After alignment of the data sets, we used the G-band
intensity to locate bright points (BPs) in the moat of a regular sunspot. With
the cospatial and cotemporal information provided by the polarimetric data, we
characterize the magnetic, kinematic, and thermal properties of the BPs. We
find that (a) 94 % of the BPs are associated with magnetic fields; (b) their
field strengths range between 500 and 1400 G, with a rather flat distribution;
(c) the contrast of BPs in the G band depends on the angle between the vector
magnetic field and the line of sight; (d) the BPs harbor downflows of
magnetized plasma and exhibit Stokes V profiles with large area and amplitude
asymmetries; (e) the magnetic interior of BPs is hotter than the immediate
field-free surroundings by about 1000 K at equal optical depth; and (f) the
mean effective diameter of BPs in our data set is 150 km, with very few BPs
larger than 300 km. Most of these properties can be explained by the classical
magnetic flux tube model. However, the wide range of BP parameters found in
this study indicates that not all G-band BPs are identical to stable long-lived
flux tubes or sheets of kG strength.
|
astro-ph
|
we present simultaneous spectropolarimetric observations of four visible and three infrared spectral lines from the vtt tenerife together with specklereconstructed filtergrams in the g band and the caii h line core from the dot la palma after alignment of the data sets we used the gband intensity to locate bright points bps in the moat of a regular sunspot with the cospatial and cotemporal information provided by the polarimetric data we characterize the magnetic kinematic and thermal properties of the bps we find that a 94 of the bps are associated with magnetic fields b their field strengths range between 500 and 1400 g with a rather flat distribution c the contrast of bps in the g band depends on the angle between the vector magnetic field and the line of sight d the bps harbor downflows of magnetized plasma and exhibit stokes v profiles with large area and amplitude asymmetries e the magnetic interior of bps is hotter than the immediate fieldfree surroundings by about 1000 k at equal optical depth and f the mean effective diameter of bps in our data set is 150 km with very few bps larger than 300 km most of these properties can be explained by the classical magnetic flux tube model however the wide range of bp parameters found in this study indicates that not all gband bps are identical to stable longlived flux tubes or sheets of kg strength
|
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|
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|
707.1233
|
Condensate and superfluid fractions for varying interactions and
temperature
|
A system with Bose-Einstein condensate is considered in the frame of the
self-consistent mean-field approximation, which is conserving, gapless, and
applicable for arbitrary interaction strengths and temperatures. The main
attention is paid to the thorough analysis of the condensate and superfluid
fractions in a wide region of interaction strengths and for all temperatures
between zero and the critical point T_c. The normal and anomalous averages are
shown to be of the same order for almost all interactions and temperatures,
except the close vicinity of T_c. But even in the vicinity of the critical
temperature, the anomalous average cannot be neglected, since only in the
presence of the latter the phase transition at T_c becomes of second order, as
it should be. Increasing temperature influences the condensate and superfluid
fractions in a similar way, by diminishing them. But their behavior with
respect to the interaction strength is very different. For all temperatures,
the superfluid fraction is larger than the condensate fraction. These coincide
only at T_c or under zero interactions. For asymptotically strong interactions,
the condensate is almost completely depleted, even at low temperatures, while
the superfluid fraction can be close to one.
|
cond-mat.stat-mech
|
a system with boseeinstein condensate is considered in the frame of the selfconsistent meanfield approximation which is conserving gapless and applicable for arbitrary interaction strengths and temperatures the main attention is paid to the thorough analysis of the condensate and superfluid fractions in a wide region of interaction strengths and for all temperatures between zero and the critical point t_c the normal and anomalous averages are shown to be of the same order for almost all interactions and temperatures except the close vicinity of t_c but even in the vicinity of the critical temperature the anomalous average cannot be neglected since only in the presence of the latter the phase transition at t_c becomes of second order as it should be increasing temperature influences the condensate and superfluid fractions in a similar way by diminishing them but their behavior with respect to the interaction strength is very different for all temperatures the superfluid fraction is larger than the condensate fraction these coincide only at t_c or under zero interactions for asymptotically strong interactions the condensate is almost completely depleted even at low temperatures while the superfluid fraction can be close to one
|
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|
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|
707.1234
|
Unparticle effect on B_s - \bar B_s mixing and its implications for B_s
\to J/\psi \phi, \phi \phi decays
|
We study the effect of unparticle stuff on $B_s - \bar{B}_s$ mixing and
consider possible implications of it for the decaymodes $B_s \to J/\psi \phi$
and $\phi \phi$. We find that due to the new contributions from the unparticles
the $B_s - \bar{B}_s$ mixing phase could be observable at the LHC along with
the possible sizable CP asymmetry parameters $S_{\psi \phi(\phi \phi)}$ in $B_s
\to J/\psi \phi(\phi \phi)$ decay modes.
|
hep-ph
|
we study the effect of unparticle stuff on b_s barb_s mixing and consider possible implications of it for the decaymodes b_s to jpsi phi and phi phi we find that due to the new contributions from the unparticles the b_s barb_s mixing phase could be observable at the lhc along with the possible sizable cp asymmetry parameters s_psi phiphi phi in b_s to jpsi phiphi phi decay modes
|
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|
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|
707.1235
|
Estimation of time delays from two blended light curves of gravitational
lenses
|
Long time photometric monitoring programs of gravitational lens systems are
often carried on using modest equipment. The resolution of such observations is
limited and some of the images may remain unresolved. It may be still possible
to find a full set of time delays from such a blended data. We discuss here a
particular but interesting case when we have two light curves that both are
blends. A suitable computational algorithm is developed and tested to work with
computer-generated model light curves. Our method combines both blended
sequences using the hypothetical time delays between the initial components of
the light curves as free input parameters. The combined curves are then
compared using statistical distance estimation. It occurs that using an
assumption of equal magnification ratios between the components of the blends,
we can indeed recover the whole set of time delays.
|
astro-ph
|
long time photometric monitoring programs of gravitational lens systems are often carried on using modest equipment the resolution of such observations is limited and some of the images may remain unresolved it may be still possible to find a full set of time delays from such a blended data we discuss here a particular but interesting case when we have two light curves that both are blends a suitable computational algorithm is developed and tested to work with computergenerated model light curves our method combines both blended sequences using the hypothetical time delays between the initial components of the light curves as free input parameters the combined curves are then compared using statistical distance estimation it occurs that using an assumption of equal magnification ratios between the components of the blends we can indeed recover the whole set of time delays
|
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|
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|
707.1236
|
Microwave whirlpools in a rectangular-waveguide cavity with a thin
ferrite disk
|
We study a three dimensional system of a rectangular-waveguide resonator with
an inserted thin ferrite disk. The interplay of reflection and transmission at
the disk interfaces together with material gyrotropy effect, gives rise to a
rich variety of wave phenomena. We analyze the wave propagation based on full
Maxwell-equation numerical solutions of the problem. We show that the
power-flow lines of the microwave-cavity field interacting with a ferrite disk,
in the proximity of its ferromagnetic resonance, form whirlpool-like
electromagnetic vortices. Such vortices are characterized by the dynamical
symmetry breaking. The role of ohmic losses in waveguide walls and dielectric
and magnetic losses in a disk is a subject of our investigations.
|
physics.class-ph physics.gen-ph
|
we study a three dimensional system of a rectangularwaveguide resonator with an inserted thin ferrite disk the interplay of reflection and transmission at the disk interfaces together with material gyrotropy effect gives rise to a rich variety of wave phenomena we analyze the wave propagation based on full maxwellequation numerical solutions of the problem we show that the powerflow lines of the microwavecavity field interacting with a ferrite disk in the proximity of its ferromagnetic resonance form whirlpoollike electromagnetic vortices such vortices are characterized by the dynamical symmetry breaking the role of ohmic losses in waveguide walls and dielectric and magnetic losses in a disk is a subject of our investigations
|
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|
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|
707.1237
|
Geometric Suppression of Single-Particle Energy Spacings in Quantum
Antidots
|
Quantum Antidot (AD) structures have remarkable properties in the integer
quantum Hall regime, exhibiting Coulomb-blockade charging and the Kondo effect
despite their open geometry. In some regimes a simple single-particle (SP)
model suffices to describe experimental observations while in others
interaction effects are clearly important, although exactly how and why
interactions emerge is unclear. We present a combination of experimental data
and the results of new calculations concerning SP orbital states which show how
the observed suppression of the energy spacing between states can be explained
through a full consideration of the AD potential, without requiring any effects
due to electron interactions such as the formation of compressible regions
composed of multiple states, which may occur at higher magnetic fields. A full
understanding of the regimes in which these effects occur is important for the
design of devices to coherently manipulate electrons in edge states using AD
resonances.
|
cond-mat.mes-hall
|
quantum antidot ad structures have remarkable properties in the integer quantum hall regime exhibiting coulombblockade charging and the kondo effect despite their open geometry in some regimes a simple singleparticle sp model suffices to describe experimental observations while in others interaction effects are clearly important although exactly how and why interactions emerge is unclear we present a combination of experimental data and the results of new calculations concerning sp orbital states which show how the observed suppression of the energy spacing between states can be explained through a full consideration of the ad potential without requiring any effects due to electron interactions such as the formation of compressible regions composed of multiple states which may occur at higher magnetic fields a full understanding of the regimes in which these effects occur is important for the design of devices to coherently manipulate electrons in edge states using ad resonances
|
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|
[-0.16398907186993636, 0.19048695424036752, -0.08329273009361271, 0.10481443223889565, -0.02889246036726478, -0.15854111535323634, 0.06703084543806727, 0.35603305308708316, -0.26314605563576965, -0.3324055677780101, 0.037802479726205755, -0.2687922304925254, -0.16582249177342936, 0.17043132700239988, 0.010068675246706384, -0.000515250489115715, 0.06526443318894913, -0.023619069541628297, -0.028069807719942684, -0.17894535246965904, 0.2956288113239901, 0.046617196179058, 0.2672824520693236, 0.11565600115352788, 0.03396960360240317, -0.001954853526832586, 0.056157226013719745, 0.036394151325677394, -0.09985655223686449, 0.065878954005736, 0.27233663935574537, -0.004001223809413008, 0.24937925425144164, -0.5088341354921058, -0.235394107461026, 0.049171758651248856, 0.16460936230519232, 0.1360651885931745, -0.059818253373393686, -0.26821150547333966, 0.0440132097408767, -0.1426559769960649, -0.1355412224970555, -0.0978887036908418, 0.019803293442630487, -0.0022637181969617517, -0.25714446327372176, 0.090404192297216, 0.06232628550119321, 0.044102368795663364, -0.0711438799245681, -0.09976741510311242, -0.033026029237442196, 0.14207610595228806, 0.017243924886586045, -0.03267206273645767, 0.13196547780613843, -0.15254863014293685, -0.1768793552324201, 0.3906297659551775, -0.012732041200522232, -0.1521418841140395, 0.22072745662818133, -0.1698155456845573, -0.08353479496027166, 0.1267824352835305, 0.16017816237778076, 0.06538476790867846, -0.09579956088517164, 0.06876888265085998, -0.010916229762212449, 0.1328303384810145, 0.03205361321090242, 0.13440341893205973, 0.25651496742392665, 0.1478260216945027, -0.0006395684715637283, 0.11111499405878193, -0.09976284988727924, -0.11908569464434844, -0.25840954107233965, -0.10521513039861315, -0.1679508975955557, 0.068022831230632, -0.028102894020726986, -0.14763868031268185, 0.42043971177819817, 0.17233594179836204, 0.21083009984923173, -0.07567323777766433, 0.2686566060874611, 0.09810400168911705, 0.0878174346321061, 0.0544628600135282, 0.2646595413925998, 0.11579161488397575, 0.07912420655279798, -0.26806246461598454, 0.07287295881935672, -0.024119232903939445]
|
707.1238
|
Infected surfaces of vehicles as possible way of people's infection by
bird flu pathogenic culture
|
Possible variant of people's infection by bird flu pathogenic culture in
passing of everyday infection is presented in the work: through the contact of
open parts of the skin with infected surfaces of the vehicle, that is the
sequent of the reused water, which contains all species spectrum of pathogen
accumulated on the urban areas, used in process of washing
|
q-bio.OT
|
possible variant of peoples infection by bird flu pathogenic culture in passing of everyday infection is presented in the work through the contact of open parts of the skin with infected surfaces of the vehicle that is the sequent of the reused water which contains all species spectrum of pathogen accumulated on the urban areas used in process of washing
|
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|
[-0.09622420068675032, 0.15025124572663723, -0.04875256995825718, 0.01230433198134051, -0.03712357342398415, -0.14139912344204883, 0.09757674696544806, 0.31886293248583875, -0.20979740376739453, -0.23148697811799746, 0.07617716382762106, -0.33983009730776154, -0.20574306935692827, 0.1623230952769518, -0.14546095406015713, 0.00172896214062348, 0.10034764929053684, 0.08231932069174945, 0.16458968957401035, -0.3147401613648981, 0.30737199473660437, -0.011888500357357164, 0.2490988656762056, 0.08384968815371394, 0.11529659455021223, 0.03817139316815883, -0.04703389989833037, -0.035936247021891174, -0.10854544795256515, 0.142368138084809, 0.3539088911687334, 0.22273508036353937, 0.29233739514214296, -0.4766775496924917, -0.23197929753999535, 0.07566358429224541, 0.16005938503270348, 0.10014743713933665, 0.029907180048758163, -0.3436824595245222, 0.023605086002498867, -0.1826063341771563, -0.14432389753637836, 0.05766190993599594, 0.05827214460199078, 0.035792157030664386, -0.15969040497827033, 0.08008909454414, 0.03240321343764663, 0.1523334648149709, -0.05833541817652683, -0.09725953431722398, -0.10723497776004175, 0.24732639429469902, 0.11228717248062216, -0.03644351615997342, 0.2454529150777186, -0.16060720177241214, -0.07651116428896784, 0.37835794179700316, -0.021964330800498526, -0.13560800317209215, 0.17831407961590837, -0.10922186536093553, -0.07987970168081422, 0.17753222809017946, 0.20205561375866335, 0.09312418453240147, -0.19699480672522138, -0.00804411256685853, -0.0253399767447263, 0.10211270786239765, 0.12158631148437658, -0.10235399379550168, 0.16702380372832218, 0.28593719253937405, 0.0865509752339373, 0.09214093612196544, -0.1259729084985641, -0.0930924541093797, -0.2269771579032143, -0.19542239337073017, -0.14411243119393474, 0.009728973029026141, -0.0889904428118219, -0.18362497991571824, 0.43310018942380946, 0.1532877733397375, 0.12680751237397392, 0.01783402424189262, 0.2663046357066681, -0.03177016981256505, 0.09695980828255416, 0.021730577371393642, 0.14809574844742504, 0.029438014534146836, 0.144898795732297, -0.22078344429222246, 0.20613623380971452, 0.015711054066196085]
|
707.1239
|
Regge Exchange Contribution to Deeply Virtual Compton Scattering
|
Recently we have shown that exclusive QCD photon-induced reactions at low
Mandelstam-t are best described by Regge exchanges in the entire scaling
region, and not only for low values of Bjorken-x. In this paper we explore this
crucial Regge behavior in Deeply Virtual Compton Scattering from the point of
view of collinear factorization, with the proton tensor written in terms of
Generalized Parton Distributions, and we reproduce this feature. Thus it
appears that in the Bjorken limit, a large class of hard, low-t exclusive
processes are more sensitive to the meson cloud of the proton than to its
fundamental quark structure. These process will then be described most
efficiently by process-dependent Regge Exclusive Amplitudes rather than by
universal Generalized Parton Distributions. We introduce such Regge Exclusive
Amplitudes for Deeply Virtual Compton Scattering.
|
hep-ph
|
recently we have shown that exclusive qcd photoninduced reactions at low mandelstamt are best described by regge exchanges in the entire scaling region and not only for low values of bjorkenx in this paper we explore this crucial regge behavior in deeply virtual compton scattering from the point of view of collinear factorization with the proton tensor written in terms of generalized parton distributions and we reproduce this feature thus it appears that in the bjorken limit a large class of hard lowt exclusive processes are more sensitive to the meson cloud of the proton than to its fundamental quark structure these process will then be described most efficiently by processdependent regge exclusive amplitudes rather than by universal generalized parton distributions we introduce such regge exclusive amplitudes for deeply virtual compton scattering
|
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|
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|
707.124
|
Partial restoration of factorization and universality in presence of
factorization breaking interactions in hadronic hard scattering processes
|
Recent works have discussed the violation of factorization and universality
in hadronic hard scattering processes aimed at measurements of T-odd
distributions. We use simple arguments to show that it is possible to restore
an approximate factorization involving T-odd contributions if the factorization
breaking interactions present a frequency spectrum dominated by by a narrow and
regular peak whose maximum value corresponds to a respected factorization.
|
hep-ph
|
recent works have discussed the violation of factorization and universality in hadronic hard scattering processes aimed at measurements of todd distributions we use simple arguments to show that it is possible to restore an approximate factorization involving todd contributions if the factorization breaking interactions present a frequency spectrum dominated by by a narrow and regular peak whose maximum value corresponds to a respected factorization
|
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|
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|
707.1241
|
Graph-Based Decoding in the Presence of ISI
|
We propose an approximation of maximum-likelihood detection in ISI channels
based on linear programming or message passing. We convert the detection
problem into a binary decoding problem, which can be easily combined with LDPC
decoding. We show that, for a certain class of channels and in the absence of
coding, the proposed technique provides the exact ML solution without an
exponential complexity in the size of channel memory, while for some other
channels, this method has a non-diminishing probability of failure as SNR
increases. Some analysis is provided for the error events of the proposed
technique under linear programming.
|
cs.IT math.IT
|
we propose an approximation of maximumlikelihood detection in isi channels based on linear programming or message passing we convert the detection problem into a binary decoding problem which can be easily combined with ldpc decoding we show that for a certain class of channels and in the absence of coding the proposed technique provides the exact ml solution without an exponential complexity in the size of channel memory while for some other channels this method has a nondiminishing probability of failure as snr increases some analysis is provided for the error events of the proposed technique under linear programming
|
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|
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|
707.1242
|
Charm Dalitz Analyses
|
A review of recent experimental results of Dalitz analyses of charmed meson
decays into three-body final states is presented. These analyses can help in
understanding the strong interaction dynamics leading to the observed light
mesons spectrum (low mass scalar $\sigma$, $f_0(980)$, $a_0(980)$). A model for
the decay amplitude into such states is very important for the extraction of
the angle $\gamma$ of the CKM unitarity triangle. Implications for such
measurement are discussed.
|
hep-ex
|
a review of recent experimental results of dalitz analyses of charmed meson decays into threebody final states is presented these analyses can help in understanding the strong interaction dynamics leading to the observed light mesons spectrum low mass scalar sigma f_0980 a_0980 a model for the decay amplitude into such states is very important for the extraction of the angle gamma of the ckm unitarity triangle implications for such measurement are discussed
|
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|
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|
707.1243
|
Euler Scheme and Tempered Distributuions
|
Given a smooth R^d-valued diffusion, we study how fast the Euler scheme with
time step 1/n converges in law. To be precise, we look for which class of test
functions f the approximate expectation E[f(X^{n,x}_1)] converges with speed
1/n to E[f(X^x_1)]. If X is uniformly elliptic, we show that this class
contains all tempered distributions, and all measurable functions with
exponential growth. We give applications to option pricing and hedging, proving
numerical convergence rates for prices, deltas and gammas.
|
math.PR
|
given a smooth rdvalued diffusion we study how fast the euler scheme with time step 1n converges in law to be precise we look for which class of test functions f the approximate expectation efxnx_1 converges with speed 1n to efxx_1 if x is uniformly elliptic we show that this class contains all tempered distributions and all measurable functions with exponential growth we give applications to option pricing and hedging proving numerical convergence rates for prices deltas and gammas
|
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|
[-0.0973895984919524, 0.08191153157559865, -0.11057904521729071, 0.08560397325676274, -0.08320923737407505, -0.1599171317134101, 0.03402944223036046, 0.43527898409512716, -0.3205466058616248, -0.1713550598844402, 0.10813774971454707, -0.2938460055587499, -0.07818021764676389, 0.2105806055297325, -0.06657423642040654, 0.10226899668477572, 0.05182959364315906, -0.006375489659704171, -0.04275547742371919, -0.2915889179551756, 0.2698312360920351, -0.032969910482114013, 0.22330416216478718, 0.023655115638847476, 0.14304870619837726, -0.040942201560949784, 0.005291230698394311, -0.016396041790192776, -0.20648609504888707, 0.09644833157238152, 0.26809386859682705, 0.09260788625227166, 0.3112320553404793, -0.3604892280871992, -0.13132763440515122, 0.23419221514811764, 0.08931694700467316, 0.027408144429217202, -0.056188765368968635, -0.20511089110831646, 0.12994062734840364, -0.16469042097496522, -0.20303866796969594, -0.144791186747879, 0.0735102291279412, 0.12178177499082302, -0.3967617566564253, 0.09178508214074997, 0.0616804931506321, -0.028478913692539777, -0.01294760594700838, -0.11731130620706584, 0.02470797457575024, 0.08049188181153172, 0.10857266132937526, 0.050322203453200834, 0.0846917338294352, -0.09330984340434857, -0.10573242732940556, 0.35080101448655515, -0.1193917216612147, -0.2559823323065391, 0.09141874231107823, -0.23682162444433802, -0.11725803625515917, 0.12078268042245469, 0.162982415032948, 0.17605888069043762, -0.1131783914570878, 0.13777835036751923, -0.03286071779666009, 0.13278737005342234, 0.0923426104951408, 0.013116465730278136, 0.06848183639843453, 0.11909716963380962, 0.17314157246116113, 0.11955788386411142, -0.024468003832674647, -0.13658196632689856, -0.3760328043929555, -0.1953325504074236, -0.15155812000625996, 0.1627136478775072, -0.14056244544483049, -0.20869908438293966, 0.3614536370802274, 0.13446601879686215, 0.17555816387515757, 0.2094187219339943, 0.21512694769938076, 0.21675641886744793, -0.07042179694520188, 0.163277686191341, 0.08496045740018901, 0.051861078000639556, 0.07611800474417094, -0.15519102046858857, 0.10106212203693274, 0.16426930497944742]
|
707.1244
|
Where are the edge-states near the quantum point contacts? A
self-consistent approach
|
In this work, we calculate the current distribution, in the close vicinity of
the quantum point contacts (QPCs), taking into account the Coulomb interaction.
In the first step, we calculate the bare confinement potential of a generic QPC
and, in the presence of a perpendicular magnetic field, obtain the positions of
the incompressible edge states (IES) taking into account electron-electron
interaction within the Thomas-Fermi theory of screening. Using a local version
of the Ohm's law, together with a relevant conductivity model, we also
calculate the current distribution. We observe that, the imposed external
current is confined locally into the incompressible strips. Our calculations
demonstrate that, the inclusion of the electron-electron interaction, strongly
changes the general picture of the transport through the QPCs.
|
cond-mat.mes-hall
|
in this work we calculate the current distribution in the close vicinity of the quantum point contacts qpcs taking into account the coulomb interaction in the first step we calculate the bare confinement potential of a generic qpc and in the presence of a perpendicular magnetic field obtain the positions of the incompressible edge states ies taking into account electronelectron interaction within the thomasfermi theory of screening using a local version of the ohms law together with a relevant conductivity model we also calculate the current distribution we observe that the imposed external current is confined locally into the incompressible strips our calculations demonstrate that the inclusion of the electronelectron interaction strongly changes the general picture of the transport through the qpcs
|
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|
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|
707.1245
|
CALICE Report to the Calorimeter R&D Review Panel
|
The report describes the status of the calorimeter R&D for ILC detector
performed in the CALICE collaboration. This status has been presented to the
review panel at the LCWS07 workshop at DESY in June 2007.
|
physics.ins-det
|
the report describes the status of the calorimeter rd for ilc detector performed in the calice collaboration this status has been presented to the review panel at the lcws07 workshop at desy in june 2007
|
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|
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|
707.1246
|
Analytical results for stochastically growing networks: connection to
the zero range process
|
We introduce a stochastic model of growing networks where both, the number of
new nodes which joins the network and the number of connections, vary
stochastically. We provide an exact mapping between this model and zero range
process, and use this mapping to derive an analytical solution of degree
distribution for any given evolution rule. One can also use this mapping to
infer about a possible evolution rule for a given network. We demonstrate this
for protein-protein interaction (PPI) network for Saccharomyces Cerevisiae.
|
cond-mat.stat-mech cond-mat.dis-nn
|
we introduce a stochastic model of growing networks where both the number of new nodes which joins the network and the number of connections vary stochastically we provide an exact mapping between this model and zero range process and use this mapping to derive an analytical solution of degree distribution for any given evolution rule one can also use this mapping to infer about a possible evolution rule for a given network we demonstrate this for proteinprotein interaction ppi network for saccharomyces cerevisiae
|
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|
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|
707.1247
|
Top Quark Physics at the LHC
|
The Large Hadron Collider (LHC) is expected to provide proton-proton
collisions at a centre-of-mass energy of 14 TeV, yielding millions of of top
quark events. The top-physics potential of the two general purpose experiments,
ATLAS and CMS, is discussed according to state-of-the-art simulation of both
physics and detectors. An overview is given of the most important results with
emphasis on the expected improvements in our understanding of physics connected
to the top quark.
|
hep-ph
|
the large hadron collider lhc is expected to provide protonproton collisions at a centreofmass energy of 14 tev yielding millions of of top quark events the topphysics potential of the two general purpose experiments atlas and cms is discussed according to stateoftheart simulation of both physics and detectors an overview is given of the most important results with emphasis on the expected improvements in our understanding of physics connected to the top quark
|
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|
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|
707.1248
|
Millimagnitude Photometry for Transiting Extrasolar Planetary Candidates
IV: The Puzzle of the Extremely Red OGLE-TR-82 Primary Solved
|
We present precise new V, I, and K-band photometry for the planetary transit
candidate star OGLE-TR-82. Good seeing V-band images acquired with VIMOS
instrument at ESO VLT allowed us to measure V=20.6+-0.03 mag star in spite of
the presence of a brighter neighbour about 1" away. This faint magnitude
answers the question why it has not been possible to measure radial velocities
for this object. One transit of this star has been observed with GMOS-S
instrument of GEMINI-South telescope in i and g-bands. The measurement of the
transit allows us to verify that this is not a false positive, to confirm the
transit amplitude measured by OGLE, and to improve the ephemeris. The transit
is well defined in i-band light curve, with a depth of A_i=0.034 mag. It is
however, less well defined, but deeper (A_g=0.1 mag) in the g-band, in which
the star is significantly fainter. The near-infrared photometry obtained with
SofI array at the ESO-NTT yields K=12.2+-0.1 and V-K=8.4+-0.1, so red that it
is unlike any other transit candidate studied before. Due to the extreme nature
of this object, we have not yet been able to measure velocities for this star,
but based on the new data we consider two different possible configurations:(1)
a nearby M7V star, or (2) a blend with a very reddened distant red giant. The
nearby M7V dwarf hypothesis would give a radius for the companion of
R_p=0.3+-0.1 R_J, i.e. the size of Neptune. Quantitative analysis of near-IR
spectroscopy finally shows that OGLE-TR-82 is a distant, reddened metal poor
early K giant. This result is confirmed by direct comparison with stellar
templates that gives the best match for a K3III star. Therefore, we discard the
planetary nature of the companion. Based on all the new data, we conclude that
this system is a main-sequence binary blended with a background red giant.
|
astro-ph
|
we present precise new v i and kband photometry for the planetary transit candidate star ogletr82 good seeing vband images acquired with vimos instrument at eso vlt allowed us to measure v206003 mag star in spite of the presence of a brighter neighbour about 1 away this faint magnitude answers the question why it has not been possible to measure radial velocities for this object one transit of this star has been observed with gmoss instrument of geminisouth telescope in i and gbands the measurement of the transit allows us to verify that this is not a false positive to confirm the transit amplitude measured by ogle and to improve the ephemeris the transit is well defined in iband light curve with a depth of a_i0034 mag it is however less well defined but deeper a_g01 mag in the gband in which the star is significantly fainter the nearinfrared photometry obtained with sofi array at the esontt yields k12201 and vk8401 so red that it is unlike any other transit candidate studied before due to the extreme nature of this object we have not yet been able to measure velocities for this star but based on the new data we consider two different possible configurations1 a nearby m7v star or 2 a blend with a very reddened distant red giant the nearby m7v dwarf hypothesis would give a radius for the companion of r_p0301 r_j ie the size of neptune quantitative analysis of nearir spectroscopy finally shows that ogletr82 is a distant reddened metal poor early k giant this result is confirmed by direct comparison with stellar templates that gives the best match for a k3iii star therefore we discard the planetary nature of the companion based on all the new data we conclude that this system is a mainsequence binary blended with a background red giant
|
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|
[-0.04267686072130681, 0.0689543952599743, -0.12755846863162498, 0.05137140578324688, -0.16319953543743457, -0.13704098253073357, 0.08277623070913348, 0.42052335167091165, -0.13982639698805474, -0.35079010616481654, 0.08610571097409128, -0.3078078569090107, -0.08691679438153804, 0.20325899431122554, -0.1358025622520527, -0.015013004162492568, 0.14240404492089426, -0.031227510201357205, -0.021889696755187097, -0.3092950444134115, 0.2504441548902979, 0.04414596998807818, 0.13136816917115435, -0.023856841255879443, 0.05253335677638912, -0.046250992629406726, -0.10014371088730958, -0.02802406554032217, -0.16047037928035554, 0.05966227948911732, 0.2195742138802666, 0.1329659323947154, 0.21220147561894467, -0.30600660766518656, -0.1798226302817789, 0.0874859814285207, 0.16943834547633962, 0.03727712770009838, -0.040408217902107774, -0.300592919256485, 0.10113196922958385, -0.14735073801411327, -0.18137388044793235, 0.038958890844080225, 0.08808164406081836, 0.0016659233487061156, -0.24384861304924743, 0.07054893907425994, 0.020767894088315635, 0.13915181641495042, -0.10738404132929731, -0.10250955505654819, -0.041258426958573166, 0.10129703483434907, -0.015406548258482835, 0.098924228908641, 0.0708667039230541, -0.11302928168103162, -0.0042933952235210465, 0.3861945300744284, -0.11093761078289073, 0.0004675085382886081, 0.2245979910949245, -0.21743019426322774, -0.15714549576518308, 0.1420929087130603, 0.11533051518116486, 0.1433913141298389, -0.19196804179559968, -0.009569231369188868, -0.014616647669021978, 0.21835903499756734, 0.05958067407775295, 0.07585473767725513, 0.31931591737115345, 0.1385887450762812, 0.06286380799321595, 0.0870233400325969, -0.27276424484189926, 0.000659274327609338, -0.20605354985040955, -0.11559027230098294, -0.17180070488505852, 0.08313035420719307, -0.09031435585162374, -0.13118473355355692, 0.3587449128691095, 0.1417266055254028, 0.21247959860769294, 0.038127347496853856, 0.3343380093637029, 0.08858238988643474, 0.12678385293814384, 0.06192871592016953, 0.349020569819657, 0.1309258372166613, 0.10590666498959177, -0.21476817414463004, 0.08062942220123122, -7.082158605874384e-05]
|
707.1249
|
Coevolution of agents and networks in an epidemiological model
|
We study the spreading of an infection within an SIS epidemiological model on
a network. Susceptible agents are given the opportunity of breaking their links
with infected agents, and reconnecting those links with the rest of the
population. Thus, the network coevolves with the population as the infection
progresses. We show that a moderate reconnection frequency is enough to
completely suppress the infection. A partial, rather weak isolation of infected
agents suffices to eliminate the endemic state.
|
physics.soc-ph
|
we study the spreading of an infection within an sis epidemiological model on a network susceptible agents are given the opportunity of breaking their links with infected agents and reconnecting those links with the rest of the population thus the network coevolves with the population as the infection progresses we show that a moderate reconnection frequency is enough to completely suppress the infection a partial rather weak isolation of infected agents suffices to eliminate the endemic state
|
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|
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|
707.125
|
Unstable Disk Galaxies. I. Modal Properties
|
I utilize the Petrov-Galerkin formulation and develop a new method for
solving the unsteady collisionless Boltzmann equation in both the linear and
nonlinear regimes. In the first order approximation, the method reduces to a
linear eigenvalue problem which is solved using standard numerical methods. I
apply the method to the dynamics of a model stellar disk which is embedded in
the field of a soft-centered logarithmic potential. The outcome is the full
spectrum of eigenfrequencies and their conjugate normal modes for prescribed
azimuthal wavenumbers. The results show that the fundamental bar mode is
isolated in the frequency space while spiral modes belong to discrete families
that bifurcate from the continuous family of van Kampen modes. The population
of spiral modes in the bifurcating family increases by cooling the disk and
declines by increasing the fraction of dark to luminous matter. It is shown
that the variety of unstable modes is controlled by the shape of the dark
matter density profile.
|
astro-ph
|
i utilize the petrovgalerkin formulation and develop a new method for solving the unsteady collisionless boltzmann equation in both the linear and nonlinear regimes in the first order approximation the method reduces to a linear eigenvalue problem which is solved using standard numerical methods i apply the method to the dynamics of a model stellar disk which is embedded in the field of a softcentered logarithmic potential the outcome is the full spectrum of eigenfrequencies and their conjugate normal modes for prescribed azimuthal wavenumbers the results show that the fundamental bar mode is isolated in the frequency space while spiral modes belong to discrete families that bifurcate from the continuous family of van kampen modes the population of spiral modes in the bifurcating family increases by cooling the disk and declines by increasing the fraction of dark to luminous matter it is shown that the variety of unstable modes is controlled by the shape of the dark matter density profile
|
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|
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|
707.1251
|
Differential elliptic flow prediction at the LHC from parton transport
|
We predict how differential elliptic flow v2(pT) changes from RHIC to LHC
collision energies (Pb+Pb at 5.5 TeV/nucleon), ASSUMING that the quark-gluon
system created has a ``minimal'' shear viscosity eta/s = 1/(4*pi) at both RHIC
and the LHC.
|
nucl-th
|
we predict how differential elliptic flow v2pt changes from rhic to lhc collision energies pbpb at 55 tevnucleon assuming that the quarkgluon system created has a minimal shear viscosity etas 14pi at both rhic and the lhc
|
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|
[-0.06737991734533696, 0.26868904689075174, -0.2905026938564874, 0.11987465680451007, 0.0033576810682142103, -0.15141856296592066, -0.16826845347453412, 0.25416361687805605, -0.26635025757541125, -0.2647910452372319, -0.05442160389360946, -0.4417558607418795, 0.18741911403029352, 0.1515292474949682, 0.08611776440630893, 0.2009626669255463, 0.18336516499481592, 0.010983881383278483, -0.06856357909989153, -0.26045381636484655, 0.2715157374009691, 0.13078279108614535, 0.2182264498158081, 0.27817462654029196, 0.08581181161256658, 0.016618323153690308, 0.06220264657325036, 0.06606046477886471, -0.24428441798463119, -0.00932989620766445, 0.3765719744024446, -0.022262582605755008, 0.09943278657423484, -0.36069477243802034, -0.13239759455963568, 0.12930064638321465, 0.07243918688539919, 0.09244615816183992, -0.03274707846041467, -0.15730501102233255, 0.1575144328227317, -0.3254973185626236, -0.11812481316863685, -0.01389079839872146, 0.030692238820798544, -0.07015158395232582, -0.31928305660147926, 0.18996315978064732, -0.13872596958803163, 0.12664499795819456, -0.040702121181262506, -0.20718623200632832, -0.18997963439874552, -0.0971876761083164, 0.10341421430427078, 0.14409702288842685, 0.2699911523534841, -0.22600619182796092, -0.12955317656333382, 0.3695848356630351, -0.009411488577874529, -0.06034790966156367, 0.23733109776937478, -0.2625716611793315, -0.14225069804721185, 0.1927715171430562, 0.31943094244579207, 0.0536287693256462, -0.18644411391201052, 0.009356770587367686, -0.032310210772462794, 0.17341756211543405, 0.18728500891577554, -0.033796878128841114, 0.20956075302249677, 0.1878959785995854, 0.028892925273425674, 0.07392652113796086, -0.07018556130424258, -0.012844460764648142, -0.46532026446751645, 0.020423905005225458, -0.06569045866411682, 0.05987960621211175, -0.09378068266095077, 0.021912690705141506, 0.3368369043880218, 0.11392281833734061, 0.31685788934181974, 0.017266772913973074, 0.241829050094443, 0.10354687977028457, -0.006143882694477971, 0.22378212163174474, 0.36634134255802714, 0.11484311329754623, 0.3990265435564357, -0.33135201557338034, 0.05128099163994193, 0.12829089220109824]
|
707.1252
|
On the Orbit Structure of the Logarithmic Potential
|
We investigate the dynamics in the logarithmic galactic potential with an
analytical approach. The phase-space structure of the real system is
approximated with resonant detuned normal forms constructed with the method
based on the Lie transform. Attention is focused on the properties of the axial
periodic orbits and of low order `boxlets' that play an important role in
galactic models. Using energy and ellipticity as parameters, we find analytical
expressions of several useful indicators, such as stability-instability
thresholds, bifurcations and phase-space fractions of some orbit families and
compare them with numerical results available in the literature.
|
astro-ph nlin.CD
|
we investigate the dynamics in the logarithmic galactic potential with an analytical approach the phasespace structure of the real system is approximated with resonant detuned normal forms constructed with the method based on the lie transform attention is focused on the properties of the axial periodic orbits and of low order boxlets that play an important role in galactic models using energy and ellipticity as parameters we find analytical expressions of several useful indicators such as stabilityinstability thresholds bifurcations and phasespace fractions of some orbit families and compare them with numerical results available in the literature
|
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|
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|
707.1253
|
Self-Similar Solutions of Viscous-Resistive ADAFs With Poloidal Magnetic
Fields
|
We carry out the self-similar solutions of viscous-resistive accretion flows
around a magnetized compact object. We consider an axisymmetric, rotating,
isotheral steady accretion flow which contains a poloidal magnetic field of the
central star. The dominant mechanism of energy dissipation is assumed to be the
turbulence viscosity and magnetic diffusivity due to magnetic field of the
central star. We explore the effect of viscosity on a rotating disk in the
presence of constant magnetic diffusivity. We show that the dynamical
quantities of ADAFs are sensitive to the advection and viscosity parameters.
Increase of the $\alpha$ coefficient in the $\alpha$-prescription model
decreases the radial velocity and increases the density of the flow. It also
affects the poloidal magnetic field considerably.
|
astro-ph
|
we carry out the selfsimilar solutions of viscousresistive accretion flows around a magnetized compact object we consider an axisymmetric rotating isotheral steady accretion flow which contains a poloidal magnetic field of the central star the dominant mechanism of energy dissipation is assumed to be the turbulence viscosity and magnetic diffusivity due to magnetic field of the central star we explore the effect of viscosity on a rotating disk in the presence of constant magnetic diffusivity we show that the dynamical quantities of adafs are sensitive to the advection and viscosity parameters increase of the alpha coefficient in the alphaprescription model decreases the radial velocity and increases the density of the flow it also affects the poloidal magnetic field considerably
|
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|
[-0.21505022198908916, 0.1907844977139868, -0.05684358233159755, 0.05341283339115207, -0.08304537259736809, -0.03640090619801875, -0.05099519570476486, 0.31150780545579176, -0.2763566083937757, -0.2839139596859025, 0.059360731178026455, -0.23191270356903138, -0.020553019219393825, 0.18957262399203886, -0.005333990196034439, -0.0018252528793478416, 0.0014346630797895082, 0.03316337560792848, -0.0300682316419779, -0.16387880505141567, 0.3546831736230623, 0.07532588237604537, 0.21867062976599624, 0.03175384726896251, 0.053095722673618694, -0.11292703393491585, -0.03140083490870893, 0.09348789465582093, -0.2152030057399223, 0.00012728645292631652, 0.11601606304204817, 0.00574720972533322, 0.22367107586627352, -0.42709585798557026, -0.2465990876258051, 0.039361229726760566, 0.17281964576361164, 0.08876772541690901, -0.05144060739923774, -0.17591267957557308, 0.06721001647026041, -0.19098709036706615, -0.17232938316824326, -0.04672728962722724, 0.07665046606256264, 0.05492418035233425, -0.30685960182178196, 0.1880987523953821, 0.10421775690535423, 0.055656702871339676, -0.17369859351113565, -0.037171981313218506, -0.11749997765212557, 0.07774342074832422, 0.1623698043700118, 0.08936527933455783, 0.2687275662300003, -0.213635873315625, 0.009988919228031221, 0.35276136743062636, -0.11136080995024482, -0.19363698643490168, 0.1919610336505792, -0.22327128156893333, -0.07864463227624428, 0.17834048204408107, 0.20637569519280755, 0.16304731340210696, -0.07586529142207514, 0.038551820334051023, -0.058073356399367865, 0.17319226957131492, 0.03071121950397047, -0.038427181718515835, 0.30623716913100524, 0.15443161047868809, 0.07006345887005455, 0.15520637395487846, -0.18444556483833152, -0.09194460507655927, -0.24654788562585994, -0.14515693577290592, -0.1296013826425424, 0.10192209912337742, -0.14945200064884975, -0.1984926469898309, 0.35168797699576715, 0.1597430824846724, 0.1626516588079601, -0.03976277535548434, 0.3016130437885048, 0.15033683573661405, 0.057822238659817664, 0.20650267823978122, 0.33304081796431695, 0.24878635009656014, 0.17965570855806817, -0.3420751222480341, 0.03649560253577844, 0.04565875480243526]
|
707.1254
|
Particle acceleration by fluctuating electric fields at a magnetic field
null point
|
Particle acceleration consequences from fluctuating electric fields
superposed on an X-type magnetic field in collisionless solar plasma are
studied. Such a system is chosen to mimic generic features of dynamic
reconnection, or the reconnective dissipation of a linear disturbance. We
explore numerically the consequences for charged particle distributions of
fluctuating electric fields superposed on an X-type magnetic field. Particle
distributions are obtained by numerically integrating individual charged
particle orbits when a time varying electric field is superimposed on a static
X-type neutral point. This configuration represents the effects of the passage
of a generic MHD disturbance through such a system. Different frequencies of
the electric field are used, representing different possible types of wave. The
electric field reduces with increasing distance from the X-type neutral point
as in linear dynamic magnetic reconnection. The resulting particle
distributions have properties that depend on the amplitude and frequency of the
electric field. In many cases a bimodal form is found. Depending on the
timescale for variation of the electric field, electrons and ions may be
accelerated to different degrees and often have energy distributions of
different forms. Protons are accelerated to $\gamma$-ray producing energies and
electrons to and above hard X-ray producing energies in timescales of 1 second.
The acceleration mechanism is possibly important for solar flares and solar
noise storms but is also applicable to all collisionless plasmas.
|
astro-ph
|
particle acceleration consequences from fluctuating electric fields superposed on an xtype magnetic field in collisionless solar plasma are studied such a system is chosen to mimic generic features of dynamic reconnection or the reconnective dissipation of a linear disturbance we explore numerically the consequences for charged particle distributions of fluctuating electric fields superposed on an xtype magnetic field particle distributions are obtained by numerically integrating individual charged particle orbits when a time varying electric field is superimposed on a static xtype neutral point this configuration represents the effects of the passage of a generic mhd disturbance through such a system different frequencies of the electric field are used representing different possible types of wave the electric field reduces with increasing distance from the xtype neutral point as in linear dynamic magnetic reconnection the resulting particle distributions have properties that depend on the amplitude and frequency of the electric field in many cases a bimodal form is found depending on the timescale for variation of the electric field electrons and ions may be accelerated to different degrees and often have energy distributions of different forms protons are accelerated to gammaray producing energies and electrons to and above hard xray producing energies in timescales of 1 second the acceleration mechanism is possibly important for solar flares and solar noise storms but is also applicable to all collisionless plasmas
|
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|
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|
707.1255
|
Fine Tuning in Supersymmetric Models
|
The solution of a fine tuning problem is one of the principal motivations of
Supersymmetry. However experimental constraints indicate that many
Supersymmetric models are also fine tuned (although to a much lesser extent).
We review the traditional measure of this fine tuning used in the literature
and propose an alternative. We apply this to the MSSM and show the
implications.
|
hep-ph
|
the solution of a fine tuning problem is one of the principal motivations of supersymmetry however experimental constraints indicate that many supersymmetric models are also fine tuned although to a much lesser extent we review the traditional measure of this fine tuning used in the literature and propose an alternative we apply this to the mssm and show the implications
|
[['the', 'solution', 'of', 'a', 'fine', 'tuning', 'problem', 'is', 'one', 'of', 'the', 'principal', 'motivations', 'of', 'supersymmetry', 'however', 'experimental', 'constraints', 'indicate', 'that', 'many', 'supersymmetric', 'models', 'are', 'also', 'fine', 'tuned', 'although', 'to', 'a', 'much', 'lesser', 'extent', 'we', 'review', 'the', 'traditional', 'measure', 'of', 'this', 'fine', 'tuning', 'used', 'in', 'the', 'literature', 'and', 'propose', 'an', 'alternative', 'we', 'apply', 'this', 'to', 'the', 'mssm', 'and', 'show', 'the', 'implications']]
|
[-0.05926048235657314, 0.07160180073915398, -0.05644954739448925, 0.12923567660424548, -0.13016023406138022, -0.14425959000363947, 0.02261757869273424, 0.4018775728220741, -0.2685883565805852, -0.3392695237028723, 0.13040887303068302, -0.1951303330482915, -0.15211442849055554, 0.16434087329544128, -0.08109893750709792, 0.06007758383639157, 0.05716556926102688, -0.0012569480886061987, -0.07627225316052015, -0.22065895327056448, 0.32039940436758724, 0.08039655750423359, 0.26697344283262886, 0.11054141072866817, 0.06816129490422705, -0.055335939772582304, -0.0429409212898463, 0.0072252278992285335, -0.1508818863741908, 0.1851138571568299, 0.19505930665066748, 0.11440594463298719, 0.2579447936887542, -0.39982299050316217, -0.23415954674128442, 0.15426642470993102, 0.17416731090440105, 0.14862804027895132, -0.03690085501099626, -0.23192693834813932, 0.07159601734019816, -0.1578119674231857, -0.11986774938025822, -0.09187041002636155, -0.05308071996551007, -0.05112094913492911, -0.2536295752506703, 0.007649139652009277, 0.017761161954452594, 0.03844242932585378, -0.058996477529096106, -0.1463793365478826, 0.0060735906629512705, 0.0883718372322619, 0.11189848462042089, -0.00893381484784186, 0.13699645668578644, -0.15963605829941419, -0.1477006056345999, 0.41769805904477836, -0.042847355750078954, -0.21416422448431452, 0.2001344235924383, -0.10115519515238702, -0.18411121553896617, 0.06452598311007023, 0.11328280079178513, 0.13991597318090498, -0.10311413294790933, 0.12745000622817315, -0.043159058100233474, 0.23473610601698358, 0.010681794172463318, 0.04616964115606, 0.1834964776566873, 0.21731827739082898, 0.07592170381200655, 0.12400757866756369, -0.046840532186130684, -0.07930692421893279, -0.3186149599341055, -0.14386838763020932, -0.10591542990878225, 0.009149210061877966, -0.07591214706917526, -0.14490736692678183, 0.4507029859038691, 0.26664429012065133, 0.27139242201422653, 0.005633391059624652, 0.27907608499129616, 0.07612136838336786, 0.07986567386930497, -0.0067670124039674795, 0.2978953335822249, 0.05104305614950135, 0.0934943236100177, -0.23174496880577256, 0.010601105300399165, 0.016165002109482886]
|
707.1256
|
The geometry of the critical set of nonlinear periodic Sturm-Liouville
operators
|
We study the critical set C of the nonlinear differential operator F(u) = -u"
+ f(u) defined on a Sobolev space of periodic functions H^p(S^1), p >= 1. Let
R^2_{xy} \subset R^3 be the plane z = 0 and, for n > 0, let cone_n be the cone
x^2 + y^2 = tan^2 z, |z - 2 pi n| < pi/2; also set Sigma = R^2_{xy} U U_{n > 0}
cone_n. For a generic smooth nonlinearity f: R -> R with surjective derivative,
we show that there is a diffeomorphism between the pairs (H^p(S^1), C) and
(R^3, Sigma) x H where H is a real separable infinite dimensional Hilbert
space.
|
math.FA math.CA
|
we study the critical set c of the nonlinear differential operator fu u fu defined on a sobolev space of periodic functions hps1 p 1 let r2_xy subset r3 be the plane z 0 and for n 0 let cone_n be the cone x2 y2 tan2 z z 2 pi n pi2 also set sigma r2_xy u u_n 0 cone_n for a generic smooth nonlinearity f r r with surjective derivative we show that there is a diffeomorphism between the pairs hps1 c and r3 sigma x h where h is a real separable infinite dimensional hilbert space
|
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|
[-0.25333725656990125, 0.11001624211507, 0.012823048050252153, 0.010985529022392533, -0.058547097040623754, -0.25587181431119854, 0.024361081656736686, 0.35082255983117805, -0.3499385100667891, -0.1314655810888128, 0.033357965901655996, -0.3467785926009326, -0.06141172163694611, 0.1457338582866056, 0.002068520705823017, 0.012435125981700485, -0.008550190047927848, 0.0710382193033381, -0.10968284682704783, -0.25910008776649507, 0.34876417191496684, -0.21635118806127296, 0.062474812887123095, -0.025755485499520666, 0.07821748625365613, -0.0005279022025997224, 0.060831246042178704, -0.029071057772734606, -0.24776019196764063, 0.02163511167442345, 0.253676843829453, 0.09264526021687071, 0.28731965050911124, -0.2604484193776127, -0.1544874188206766, 0.25616406792086427, 0.15141542344961478, -0.15796355753327193, 0.027642282985059708, -0.3014020983385347, 0.12355195542635478, -0.07791994389591982, -0.16910300299565753, -0.02324226527960728, 0.23075669041186894, 0.011261043723409428, -0.37643433403750154, 0.0446905200493031, 0.09270544889960033, 0.08713005699278058, 0.0007640851342686168, -0.1714130414184183, -0.15655357352174495, -0.00841950907614892, -0.04709143475528159, 0.29343277614047425, 0.0219074855103036, -0.04029076308135067, -0.017592985369012003, 0.36993992206154636, -0.1326984135204997, -0.2831044499154972, 0.08675137662794441, -0.2696997969482175, -0.10838937822162457, 0.1179510451326836, 0.1186545113729232, 0.16395193391034138, -0.008168511001555167, 0.3684362908154625, -0.1107773250323194, 0.18119814685221924, 0.06688374225252672, -0.025821022745019392, 0.06752577309405593, 0.055104110126748033, 0.10008031662310594, 0.04749601114915846, -0.04610113327583784, 0.07893898123470337, -0.4548250478894814, -0.1547073327794509, -0.1430479579050924, 0.23081499646903705, -0.1468486496264434, -0.12977609947404783, 0.2799259611385186, -0.03392920740589034, 0.25224403496426734, 0.06295998718427576, 0.12993618717882782, 0.14048913517320255, -0.059285679126016635, 0.10729326968810157, 0.033689444249435124, 0.12659598239849362, 0.008544848776300963, -0.19323275759866784, -0.06660709750798086, 0.15879854636327567]
|
707.1257
|
On the solution of trivalent decision problems by quantum state
identification
|
The trivalent functions of a trit can be grouped into equipartitions of three
elements. We discuss the separation of the corresponding functional classes by
quantum state identifications.
|
quant-ph
|
the trivalent functions of a trit can be grouped into equipartitions of three elements we discuss the separation of the corresponding functional classes by quantum state identifications
|
[['the', 'trivalent', 'functions', 'of', 'a', 'trit', 'can', 'be', 'grouped', 'into', 'equipartitions', 'of', 'three', 'elements', 'we', 'discuss', 'the', 'separation', 'of', 'the', 'corresponding', 'functional', 'classes', 'by', 'quantum', 'state', 'identifications']]
|
[-0.15437664712468782, 0.19742984146621353, -0.08223777479078206, 0.05835806236912807, 0.04021080888600813, -0.09795493123776934, 0.05209971960047605, 0.34591041808878936, -0.2878153807035199, -0.29242054410968665, 0.05142417969182134, -0.30836019040671764, -0.07627335939280412, 0.13699079372195733, 0.000742805293864674, -0.004494505210055245, 0.05232861919190596, 0.03189801893852375, -0.14803665314145661, -0.24386746032784382, 0.37104289757984654, -0.0912085583097198, 0.20977235888993298, -0.03135102016299411, 0.053557252442395245, 0.01868295522958592, 0.004431825044944331, 0.08455712767317891, -0.09504821903451725, 0.19522187444898817, 0.2774830154246754, 0.15517854959600502, 0.21290902441574466, -0.38703738318549263, -0.183330657236554, 0.06278546485635969, 0.09071608774226021, 0.10096877433911518, 0.023880394037674973, -0.3516261323734566, 0.09160613554909273, -0.15246650404124348, -0.08476906964831331, -0.09101594725830688, -0.02997781175913082, 0.09264609169352937, -0.19272294192126505, 0.01971909914303709, 0.06447565318430187, 0.007453151806085198, -0.0900975390923796, -0.19083671823695855, -0.059050046683599554, 0.17305985778673655, -0.03753224415359674, -0.02896314498933929, 0.09257162464092727, -0.11478006522412654, -0.16914900419888673, 0.33835155623792496, 0.0071439991394678755, -0.2086524554340738, 0.15878262315635328, -0.07972622999093598, -0.17900858571132025, 0.11353573727386969, 0.13500471661488214, 0.11588485214721274, -0.15452573886486115, 0.07271377628462182, -0.013367803232675349, 0.1554735934499789, 0.0751076856352113, 0.09136684390681761, 0.23183622231913936, 0.07171055767685175, 0.048442810101227626, 0.24686355609015595, -0.0956045248442226, -0.08642156204829614, -0.34215536023731585, -0.22311172430851944, -0.1403500694885022, 0.05346976013647185, -0.11064029857516289, -0.15540142888548197, 0.4593089317937416, 0.025093365788321803, 0.2247606910446107, -0.011432497727650183, 0.15869409804818807, 0.14526863019003672, 0.0985602670935569, 0.032055025851285016, 0.16659183027567687, 0.161557359698539, -0.027660627883893472, -0.19442171658630725, 0.04537143363375907, 0.14213049901580369]
|
707.1258
|
Multi-Particle Decays of Light Mesons Measured by PHENIX at RHIC
|
The PHENIX experiment at RHIC measured K0S, eta and omega-meson production at
high pT in p+p, d+Au and Au+Au collisions at sqrt(s_NN)=200 GeV. Measurements
performed in different hadronic decay channels give consistent results. This
paper presents measured meson-to-pi0 ratios and Nuclear Modification factors in
the most central d+Au and Au+Au collisions. No suppression seen in d+Au
interactions is in contrast to a strong suppression of meson yields revealed in
central Au+Au collisions at the same energy.
|
nucl-ex
|
the phenix experiment at rhic measured k0s eta and omegameson production at high pt in pp dau and auau collisions at sqrts_nn200 gev measurements performed in different hadronic decay channels give consistent results this paper presents measured mesontopi0 ratios and nuclear modification factors in the most central dau and auau collisions no suppression seen in dau interactions is in contrast to a strong suppression of meson yields revealed in central auau collisions at the same energy
|
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|
[-0.09444105721699694, 0.2516481698739032, -0.21576306074624882, 0.14670154889424641, 0.10854832590247195, -0.12624706039205194, -0.13620425091280292, 0.3181064073834568, -0.15340682673733683, -0.28682489703098935, -0.19679705491289495, -0.4379562951127688, 0.19961359002937873, 0.13175262151906889, 0.09460681750128666, 0.1292645813167716, 0.1906951098019878, -0.001564094889909029, -0.029628071778764326, -0.12898525658684473, 0.23255800396203996, 0.19464469070546328, 0.21360534695908429, 0.28743628337979316, -0.023322906295458475, 0.1101011964896073, -0.04861307371019696, -0.0002006015523026387, -0.1477093062674006, -0.007701797735644504, 0.3869931798800826, -0.02969408978087207, 0.09440432526792089, -0.33087262955804664, -0.07246967449706669, 0.16944859166940054, 0.13484185262583195, 0.056607740509013335, -0.18539193299909432, -0.24145199805498124, 0.17919396749387184, -0.28860619362443685, -0.079369246934851, 0.017035718810123703, 0.0005218715717395147, -0.013623687053720156, -0.3658728543544809, 0.2199913823294143, -0.037189527451992034, 0.16750491430672507, -0.008687341343611479, -0.23412941418588162, -0.06797082548340162, -0.0575675836764276, 0.06913248187241455, 0.19621708358948428, 0.23078612743566435, -0.14896372504687558, -0.2102941623950998, 0.4299014010032018, 0.022394709115227063, -0.021702461595026156, 0.2384627426881343, -0.3268118559507032, -0.20890853593746822, 0.16008303152707715, 0.312546159264942, 0.031261918740347026, -0.24615109076102576, -0.030375041778509814, -0.009819257532556852, 0.20116778370924293, 0.2049133777494232, 0.11305628729363283, 0.07406602886815866, 0.18161252371656397, -0.08909016881952994, 0.08286920158813398, -0.11287045322358608, -0.07214125841856003, -0.4258055135204146, 0.004778434429317713, -0.037174626837174096, 0.02072789625575145, -0.07719699799936885, 0.10412328487883012, 0.31874206542347866, 0.048570597060024735, 0.3765516143043836, -0.06964623843630155, 0.29673706376304226, 0.0628995130940651, 0.04740429525263608, 0.15884834865108133, 0.3540031016866366, 0.2038278149565061, 0.3553533906365434, -0.2845869236749907, 0.08975210705151161, 0.0014808830308417479]
|
707.1259
|
Spin Physics: Session Summary
|
We summarize the main results of the spin physics Working Group Session of
DIS 2007, the 15th International Workshop on ``Deep-Inelastic Scattering and
Related Subjects''.
|
hep-ph hep-ex
|
we summarize the main results of the spin physics working group session of dis 2007 the 15th international workshop on deepinelastic scattering and related subjects
|
[['we', 'summarize', 'the', 'main', 'results', 'of', 'the', 'spin', 'physics', 'working', 'group', 'session', 'of', 'dis', '2007', 'the', '15th', 'international', 'workshop', 'on', 'deepinelastic', 'scattering', 'and', 'related', 'subjects']]
|
[-0.0749713222682476, 0.15881181409582495, -0.12964944176375867, 0.06263024296611547, -0.14494574144482614, -0.029218541570007802, 0.0250695775449276, 0.3075698558986187, -0.16810001868754626, -0.31525101855397225, 0.12497158138081431, -0.37343905373476444, -0.1080425401031971, 0.20383390061557294, -0.03407379567623139, 0.027885957956314086, 0.10294686421751977, 0.015264354012906552, -0.037574725784361364, -0.38443741485476496, 0.34889779657125475, 0.10367152696475386, 0.3416443219780922, 0.12290621429681778, 0.08681431271135807, 0.17738013749942183, -0.23749202787876128, -0.12794145256280898, -0.0985021566785872, 0.17772139117121696, 0.407745574042201, 0.08316463857889175, 0.13599356614053248, -0.4756567895412445, -0.016488826386630535, -0.07096910627558828, -0.02774279087781906, 0.01782286583678797, -0.02292147769127041, -0.35211196303367615, -0.11971135877072811, -0.23773634377866984, -0.07311422720551491, 0.018708636883529833, -0.019334115386009217, 0.028190238177776338, -0.13420385882258415, 0.017974055372178555, 0.05809010469034547, 0.1263637148309499, -0.04386781750246883, -0.19482791516929865, 0.009524743519723416, 0.1748466537501372, 0.1362361566349864, 0.10191682854667306, 0.11806214133277536, -0.1420570531487465, -0.2665798757970333, 0.39458864025771617, 0.03974312774837017, 0.07402682274580002, 0.1968630657158792, -0.3169264975935221, -0.2139946671575308, 0.01609593812376261, 0.35892732959240675, 0.06494739064015448, -0.19490539852529765, 0.1516696496284567, -0.08627223700284958, 0.19192823871970177, 0.08385524548590183, -0.05503045663237572, 0.17800165548920632, 0.27053589049726723, -0.09208837542682886, -0.029877993268892167, -0.09929384389892221, -0.09559635605663061, -0.4227744525671005, -0.09657384227961302, -0.04844342216849327, 0.0007924114167690277, 0.03852463344170246, -0.02485713729634881, 0.399518324136734, 0.14255929954349994, 0.13713958024978637, -0.047976057002088054, 0.20710845436900854, -0.006319769839756191, 0.006717936601489782, 0.057571935895830394, 0.23365111820399762, 0.18821880124509335, 0.20067638816311956, -0.2514210908487439, 0.04768766168504954, 0.12280019082129001]
|
707.126
|
An efficient quantum algorithm for the hidden subgroup problem in nil-2
groups
|
In this paper we extend the algorithm for extraspecial groups in
\cite{iss07}, and show that the hidden subgroup problem in nil-2 groups, that
is in groups of nilpotency class at most 2, can be solved efficiently by a
quantum procedure. The algorithm presented here has several additional
features. It contains a powerful classical reduction for the hidden subgroup
problem in nilpotent groups of constant nilpotency class to the specific case
where the group is a $p$-group of exponent $p$ and the subgroup is either
trivial or cyclic. This reduction might also be useful for dealing with groups
of higher nilpotency class. The quantum part of the algorithm uses well chosen
group actions based on some automorphisms of nil-2 groups. The right choice of
the actions requires the solution of a system of quadratic and linear
equations. The existence of a solution is guaranteed by the Chevalley-Warning
theorem, and we prove that it can also be found efficiently.
|
quant-ph
|
in this paper we extend the algorithm for extraspecial groups in citeiss07 and show that the hidden subgroup problem in nil2 groups that is in groups of nilpotency class at most 2 can be solved efficiently by a quantum procedure the algorithm presented here has several additional features it contains a powerful classical reduction for the hidden subgroup problem in nilpotent groups of constant nilpotency class to the specific case where the group is a pgroup of exponent p and the subgroup is either trivial or cyclic this reduction might also be useful for dealing with groups of higher nilpotency class the quantum part of the algorithm uses well chosen group actions based on some automorphisms of nil2 groups the right choice of the actions requires the solution of a system of quadratic and linear equations the existence of a solution is guaranteed by the chevalleywarning theorem and we prove that it can also be found efficiently
|
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|
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|
707.1261
|
Search for Low Mass Exotic leptonic or bosonic structures
|
Recently, several papers discussed the existence of a low mass leptonic
structure. It was suggested that the $\Sigma^{+}$ disintegration:
$\Sigma^{+}\to$pP$^{0}$, P$^{0}\to\mu^{-}\mu^{+}$ proceeds through an
intermediate particle P$^{0}$ having a mass close to M$\approx$~214.3 MeV. The
present work intends to look at other available data, in order to observe the
eventual existence of a small peak or shoulder, at a mass close to M=214.3 MeV,
which can strengthen the existence of a state produced by two leptons of
opposite electric charge.
|
nucl-ex
|
recently several papers discussed the existence of a low mass leptonic structure it was suggested that the sigma disintegration sigmatopp0 p0tomumu proceeds through an intermediate particle p0 having a mass close to mapprox2143 mev the present work intends to look at other available data in order to observe the eventual existence of a small peak or shoulder at a mass close to m2143 mev which can strengthen the existence of a state produced by two leptons of opposite electric charge
|
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|
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|
707.1262
|
The Different Physical Mechanisms that Drive the Star-Formation
Histories of Giant and Dwarf Galaxies
|
We present an analysis of star-formation and nuclear activity in galaxies as
a function of both luminosity and environment in the SDSS DR4 dataset. Using a
sample of 27753 galaxies at 0.005<z<0.037 that is >90% complete to Mr=-18.0 we
find that the EW(Ha) distribution is strongly bimodal, allowing galaxies to be
robustly separated into passive and star-forming populations about a value
EW(Ha)=2A. In high-density regions ~70% of galaxies are passive independent of
luminosity. In the rarefied field however, the fraction of passively-evolving
galaxies is a strong function of luminosity, dropping from ~50% for Mr<-21 to
zero by Mr~-18. Indeed for the lowest luminosity range covered (-18<Mr<-16)
none of the ~600 galaxies in the lowest density quartile are passive. The few
passively-evolving dwarf galaxies in field regions appear as satellites to
bright (~L*) galaxies. The fraction of galaxies with optical AGN signatures
decreases steadily from ~50% at Mr~-21 to ~0% by Mr~-18 closely mirroring the
luminosity-dependence of the passive galaxy fraction in low-density
environments. This result reflects the increasing importance of AGN feedback
with galaxy mass for their evolution, such that the star-formation histories of
massive galaxies are primarily determined by their past merger history. In
contrast, the complete absence of passively-evolving dwarf galaxies more than
~2 virial radii from the nearest massive halo (i.e. cluster, group or massive
galaxy) indicates that internal processes, such as merging, AGN feedback or gas
consumption through star-formation, are not responsible for terminating
star-formation in dwarf galaxies. Instead the evolution of dwarf galaxies is
primarily driven by the mass of their host halo, probably through the combined
effects of tidal forces and ram-pressure stripping.
|
astro-ph
|
we present an analysis of starformation and nuclear activity in galaxies as a function of both luminosity and environment in the sdss dr4 dataset using a sample of 27753 galaxies at 0005z0037 that is 90 complete to mr180 we find that the ewha distribution is strongly bimodal allowing galaxies to be robustly separated into passive and starforming populations about a value ewha2a in highdensity regions 70 of galaxies are passive independent of luminosity in the rarefied field however the fraction of passivelyevolving galaxies is a strong function of luminosity dropping from 50 for mr21 to zero by mr18 indeed for the lowest luminosity range covered 18mr16 none of the 600 galaxies in the lowest density quartile are passive the few passivelyevolving dwarf galaxies in field regions appear as satellites to bright l galaxies the fraction of galaxies with optical agn signatures decreases steadily from 50 at mr21 to 0 by mr18 closely mirroring the luminositydependence of the passive galaxy fraction in lowdensity environments this result reflects the increasing importance of agn feedback with galaxy mass for their evolution such that the starformation histories of massive galaxies are primarily determined by their past merger history in contrast the complete absence of passivelyevolving dwarf galaxies more than 2 virial radii from the nearest massive halo ie cluster group or massive galaxy indicates that internal processes such as merging agn feedback or gas consumption through starformation are not responsible for terminating starformation in dwarf galaxies instead the evolution of dwarf galaxies is primarily driven by the mass of their host halo probably through the combined effects of tidal forces and rampressure stripping
|
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|
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|
707.1263
|
Affine systems: asymptotics at infinity for fractal measures
|
We study measures on $\mathbb{R}^d$ which are induced by a class of infinite
and recursive iterations in symbolic dynamics. Beginning with a finite set of
data, we analyze prescribed recursive iteration systems, each involving
subdivisions. The construction includes measures arising from affine and
contractive iterated function systems with and without overlap (IFSs), i.e.,
limit measures $\mu$ induced by a finite family of affine mappings in
$\mathbb{R}^d$ (the focus of our paper), as well as equilibrium measures in
complex dynamics.
By a systematic analysis of the Fourier transform of the measure $\mu$ at
hand (frequency domain), we identify asymptotic laws, spectral types,
dichotomy, and chaos laws. In particular we show that the cases when $\mu$ is
singular carry a gradation, ranging from Cantor-like fractal measures to
measures exhibiting chaos, i.e., a situation when small changes in the initial
data produce large fluctuations in the outcome, or rather, the iteration limit
(in this case the measures). Our method depends on asymptotic estimates on the
Fourier transform of $\mu$ for paths at infinity in $\mathbb{R}^d$. We show how
properties of $\mu$ depend on perturbations of the initial data, e.g.,
variations in a prescribed finite set of affine mappings in $\mathbb{R}^d$, in
parameters of a rational function in one complex variable (Julia sets and
equilibrium measures), or in the entries of a given infinite positive definite
matrix.
|
math.DS math.SP
|
we study measures on mathbbrd which are induced by a class of infinite and recursive iterations in symbolic dynamics beginning with a finite set of data we analyze prescribed recursive iteration systems each involving subdivisions the construction includes measures arising from affine and contractive iterated function systems with and without overlap ifss ie limit measures mu induced by a finite family of affine mappings in mathbbrd the focus of our paper as well as equilibrium measures in complex dynamics by a systematic analysis of the fourier transform of the measure mu at hand frequency domain we identify asymptotic laws spectral types dichotomy and chaos laws in particular we show that the cases when mu is singular carry a gradation ranging from cantorlike fractal measures to measures exhibiting chaos ie a situation when small changes in the initial data produce large fluctuations in the outcome or rather the iteration limit in this case the measures our method depends on asymptotic estimates on the fourier transform of mu for paths at infinity in mathbbrd we show how properties of mu depend on perturbations of the initial data eg variations in a prescribed finite set of affine mappings in mathbbrd in parameters of a rational function in one complex variable julia sets and equilibrium measures or in the entries of a given infinite positive definite matrix
|
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|
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|
707.1264
|
Intrinsic optical bistability of thin films of linear molecular
aggregates: The one-exciton approximation
|
We perform a theoretical study of the nonlinear optical response of an
ultrathin film consisting of oriented linear aggregates. A single aggregate is
described by a Frenkel exciton Hamiltonian with uncorrelated on-site disorder.
The exciton wave functions and energies are found exactly by numerically
diagonalizing the Hamiltonian. The principal restriction we impose is that only
the optical transitions between the ground state and optically dominant states
of the one-exciton manifold are considered, whereas transitions to other
states, including those of higher exciton manifolds, are neglected. The optical
dynamics of the system is treated within the framework of truncated optical
Maxwell-Bloch equations in which the electric polarization is calculated by
using a joint distribution of the transition frequency and the transition
dipole moment of the optically dominant states. This function contains all the
statistical information about these two quantities that govern the optical
response, and is obtained numerically by sampling many disorder realizations.
We derive a steady-state equation that establishes a relationship between the
output and input intensities of the electric field and show that within a
certain range of the parameter space this equation exhibits a three-valued
solution for the output field. A time-domain analysis is employed to
investigate the stability of different branches of the three-valued solutions
and to get insight into switching times. We discuss the possibility to
experimentally verify the bistable behavior.
|
cond-mat.dis-nn cond-mat.mtrl-sci
|
we perform a theoretical study of the nonlinear optical response of an ultrathin film consisting of oriented linear aggregates a single aggregate is described by a frenkel exciton hamiltonian with uncorrelated onsite disorder the exciton wave functions and energies are found exactly by numerically diagonalizing the hamiltonian the principal restriction we impose is that only the optical transitions between the ground state and optically dominant states of the oneexciton manifold are considered whereas transitions to other states including those of higher exciton manifolds are neglected the optical dynamics of the system is treated within the framework of truncated optical maxwellbloch equations in which the electric polarization is calculated by using a joint distribution of the transition frequency and the transition dipole moment of the optically dominant states this function contains all the statistical information about these two quantities that govern the optical response and is obtained numerically by sampling many disorder realizations we derive a steadystate equation that establishes a relationship between the output and input intensities of the electric field and show that within a certain range of the parameter space this equation exhibits a threevalued solution for the output field a timedomain analysis is employed to investigate the stability of different branches of the threevalued solutions and to get insight into switching times we discuss the possibility to experimentally verify the bistable behavior
|
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|
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|
707.1265
|
Coarse grained models in Coulomb-frustrated phase separation
|
Competition between interactions on different length scales leads to
self-organized textures in classical as well as quantum systems. This pattern
formation phenomenon has been invoked to explain some intriguing properties of
a large variety of strongly correlated electronic systems that includes for
example high temperature superconductors and colossal magnetoresistance
manganites. We classify the more common situations in which Coulomb frustrated
phase separation can occur and review their properties.
|
cond-mat.str-el
|
competition between interactions on different length scales leads to selforganized textures in classical as well as quantum systems this pattern formation phenomenon has been invoked to explain some intriguing properties of a large variety of strongly correlated electronic systems that includes for example high temperature superconductors and colossal magnetoresistance manganites we classify the more common situations in which coulomb frustrated phase separation can occur and review their properties
|
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|
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|
707.1266
|
Building Decision Procedures in the Calculus of Inductive Constructions
|
It is commonly agreed that the success of future proof assistants will rely
on their ability to incorporate computations within deduction in order to mimic
the mathematician when replacing the proof of a proposition P by the proof of
an equivalent proposition P' obtained from P thanks to possibly complex
calculations. In this paper, we investigate a new version of the calculus of
inductive constructions which incorporates arbitrary decision procedures into
deduction via the conversion rule of the calculus. The novelty of the problem
in the context of the calculus of inductive constructions lies in the fact that
the computation mechanism varies along proof-checking: goals are sent to the
decision procedure together with the set of user hypotheses available from the
current context. Our main result shows that this extension of the calculus of
constructions does not compromise its main properties: confluence, subject
reduction, strong normalization and consistency are all preserved.
|
cs.LO
|
it is commonly agreed that the success of future proof assistants will rely on their ability to incorporate computations within deduction in order to mimic the mathematician when replacing the proof of a proposition p by the proof of an equivalent proposition p obtained from p thanks to possibly complex calculations in this paper we investigate a new version of the calculus of inductive constructions which incorporates arbitrary decision procedures into deduction via the conversion rule of the calculus the novelty of the problem in the context of the calculus of inductive constructions lies in the fact that the computation mechanism varies along proofchecking goals are sent to the decision procedure together with the set of user hypotheses available from the current context our main result shows that this extension of the calculus of constructions does not compromise its main properties confluence subject reduction strong normalization and consistency are all preserved
|
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|
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|
707.1267
|
Production of multipartite entanglement for electron spins in quantum
dots
|
We propose how to generate genuine multipartite entanglement of electron spin
qubits in a chain of quantum dots using the naturally available single-qubit
rotations and two-qubit Heisenberg exchange interaction in the system. We show
that the minimum number of required operations to generate entangled states of
the GHZ-, cluster and W-type scales linearly with the number of qubits and
estimate the fidelities of the generated entangled cluster states. As the
required single and two-qubit operations have recently been realized, our
proposed scheme opens the way for experimental investigation of multipartite
entanglement with electron spin qubits.
|
cond-mat.mes-hall quant-ph
|
we propose how to generate genuine multipartite entanglement of electron spin qubits in a chain of quantum dots using the naturally available singlequbit rotations and twoqubit heisenberg exchange interaction in the system we show that the minimum number of required operations to generate entangled states of the ghz cluster and wtype scales linearly with the number of qubits and estimate the fidelities of the generated entangled cluster states as the required single and twoqubit operations have recently been realized our proposed scheme opens the way for experimental investigation of multipartite entanglement with electron spin qubits
|
[['we', 'propose', 'how', 'to', 'generate', 'genuine', 'multipartite', 'entanglement', 'of', 'electron', 'spin', 'qubits', 'in', 'a', 'chain', 'of', 'quantum', 'dots', 'using', 'the', 'naturally', 'available', 'singlequbit', 'rotations', 'and', 'twoqubit', 'heisenberg', 'exchange', 'interaction', 'in', 'the', 'system', 'we', 'show', 'that', 'the', 'minimum', 'number', 'of', 'required', 'operations', 'to', 'generate', 'entangled', 'states', 'of', 'the', 'ghz', 'cluster', 'and', 'wtype', 'scales', 'linearly', 'with', 'the', 'number', 'of', 'qubits', 'and', 'estimate', 'the', 'fidelities', 'of', 'the', 'generated', 'entangled', 'cluster', 'states', 'as', 'the', 'required', 'single', 'and', 'twoqubit', 'operations', 'have', 'recently', 'been', 'realized', 'our', 'proposed', 'scheme', 'opens', 'the', 'way', 'for', 'experimental', 'investigation', 'of', 'multipartite', 'entanglement', 'with', 'electron', 'spin', 'qubits']]
|
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|
707.1268
|
Direct CP violation of $B \to l \nu$ in unparticle physics
|
We have investigated the effects of unparticles in decays $B \to l \nu$. It
is found that the direct CP violation in the decays, which is zero in SM, can
show up due to the CP conserving phase intrinsic in unparticle physics. For
$l=\tau$, the direct CP asymmetry can reach 30% for the scalar unparticle
contribution, and 100% for the longitudinal vector unparticle contribution
under the constraints of ${\rm Br}(B\to\tau\nu)$ and $\nu e$ elastic
scattering. If both unparticle-lepton coupling universality and
unparticle-quark coupling universality are assumed the constraint from
$Br(\pi\to \mu\nu)$ leads that the direct CP violation in $B\to l\nu$ can only
reach at most 8% and 1% for scalar and vector unparticle contributions
respectively if $d_{\cal U} < 2$. If the direct CP violation is observed in the
future it would give strong evidence for the existence of unparticle stuff.
|
hep-ph
|
we have investigated the effects of unparticles in decays b to l nu it is found that the direct cp violation in the decays which is zero in sm can show up due to the cp conserving phase intrinsic in unparticle physics for ltau the direct cp asymmetry can reach 30 for the scalar unparticle contribution and 100 for the longitudinal vector unparticle contribution under the constraints of rm brbtotaunu and nu e elastic scattering if both unparticlelepton coupling universality and unparticlequark coupling universality are assumed the constraint from brpito munu leads that the direct cp violation in bto lnu can only reach at most 8 and 1 for scalar and vector unparticle contributions respectively if d_cal u 2 if the direct cp violation is observed in the future it would give strong evidence for the existence of unparticle stuff
|
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|
[-0.1410670454018092, 0.2522607177174102, -0.020389558718306944, 0.13340119039554232, -0.12146801144562606, -0.1867651791202233, 0.05930793058959192, 0.24682028231430142, -0.27879558647178143, -0.2630478592336123, 0.012191419272258988, -0.3217504714540316, -0.061374203093959405, 0.11548438096446369, 0.13656578093137153, 0.031237686214701493, 0.000386713065809625, 0.037073480150224096, -0.07784835726145983, -0.1793451464669916, 0.25927676502204333, -0.027047150845379186, 0.22999309870304868, 0.16573762993442975, 0.0009164791314533967, -0.008236524135367396, -0.03390543765443213, -0.03895091191482018, -0.12480783390310535, 0.0026906740796916627, 0.1837259905604536, 0.1147963535725413, 0.11032895727411789, -0.32517057105981034, -0.11381532449912116, 0.2266670194495579, 0.15046711411902353, 0.049791340275345757, -0.032141289201236385, -0.3298018819974352, 0.1351683554937207, -0.1495282748090925, -0.04825114073259208, -0.09015580519403824, 0.08221799987094368, -0.15052314534071176, -0.3770547378294663, 0.1267296484678381, -0.0039752715340856575, -0.0016696539823897183, 0.020104469472939587, -0.19442854964119546, -0.035692420457695224, 0.02456194839289631, 0.17243023587370238, 0.06324331731850501, 0.1208316631930168, -0.16283028304700137, -0.1427390314210617, 0.4378197762553635, -0.13357645215343356, -0.22519145998418988, 0.16894117239109405, -0.23941835511804505, -0.1620040378824984, 0.15398083466125706, 0.1737037542488371, 0.007738110979356433, -0.14399567865835064, 0.21880710329851888, -0.03998418010472532, 0.12403827251674716, 0.037106531317797765, 0.09035130377228864, 0.20914944750941633, 0.14066890701702933, 0.0903147210877197, 0.038223941132481044, -0.11125481531181482, -0.010112198781879508, -0.41800742108213906, -0.16220989052945858, -0.1073118800550754, 0.11121453642365797, -0.07884968172359497, -0.026384380046853468, 0.33313540395594077, 0.10919008650270211, 0.1911986298595473, 0.026545843231895773, 0.24818528074983454, 0.10400330851510209, 0.07754769449007547, 0.05477171020774061, 0.39572309127406163, 0.16214802406509132, 0.142603128340424, -0.2691318527709775, 0.05383630482623737, 0.0009719762910047875]
|
707.1269
|
Quarkonium Spectroscopy: Beyond One-Gluon Exchange
|
In this work an improved potential model for quarkonium spectra (charmonium,
bottomonium) is constructed. Beside the one-gluon exchange and a linear
confinement potential, the model includes systematically effects from two-gluon
exchange and the induced interaction (i.e. t-channel exchanges of
quark-antiquark bound states). These turn out to be important in order to
reproduce correctly the fine- and hyperfine structure of the charmonium and
bottomonium states. It is demonstrated that such a satisfactory description of
the quarkonium spectra can be obtained with parameters (quark masses, strong
coupling constant and string tension) consistent with values of lattice
simulations and QCD determinations.
|
hep-ph
|
in this work an improved potential model for quarkonium spectra charmonium bottomonium is constructed beside the onegluon exchange and a linear confinement potential the model includes systematically effects from twogluon exchange and the induced interaction ie tchannel exchanges of quarkantiquark bound states these turn out to be important in order to reproduce correctly the fine and hyperfine structure of the charmonium and bottomonium states it is demonstrated that such a satisfactory description of the quarkonium spectra can be obtained with parameters quark masses strong coupling constant and string tension consistent with values of lattice simulations and qcd determinations
|
[['in', 'this', 'work', 'an', 'improved', 'potential', 'model', 'for', 'quarkonium', 'spectra', 'charmonium', 'bottomonium', 'is', 'constructed', 'beside', 'the', 'onegluon', 'exchange', 'and', 'a', 'linear', 'confinement', 'potential', 'the', 'model', 'includes', 'systematically', 'effects', 'from', 'twogluon', 'exchange', 'and', 'the', 'induced', 'interaction', 'ie', 'tchannel', 'exchanges', 'of', 'quarkantiquark', 'bound', 'states', 'these', 'turn', 'out', 'to', 'be', 'important', 'in', 'order', 'to', 'reproduce', 'correctly', 'the', 'fine', 'and', 'hyperfine', 'structure', 'of', 'the', 'charmonium', 'and', 'bottomonium', 'states', 'it', 'is', 'demonstrated', 'that', 'such', 'a', 'satisfactory', 'description', 'of', 'the', 'quarkonium', 'spectra', 'can', 'be', 'obtained', 'with', 'parameters', 'quark', 'masses', 'strong', 'coupling', 'constant', 'and', 'string', 'tension', 'consistent', 'with', 'values', 'of', 'lattice', 'simulations', 'and', 'qcd', 'determinations']]
|
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|
707.127
|
Spherically symmetric selfdual Yang-Mills instantons on curved
backgrounds in all even dimensions
|
We present several different classes of selfdual Yang-Mills instantons in all
even d backgrounds with Euclidean signature. In d=4p+2 the only solutions we
found are on constant curvature dS and AdS backgrounds, and are evaluated in
closed form. In d=4p an interesting class of instantons are given on black hole
backgrounds. One class of solutions are (Euclidean) time-independent and
spherically symmetric in d-1 dimensions, and the other class are spherically
symmetric in all d dimensions. Some of the solutions in the former class are
evaluated numerically, all the rest being given in closed form. Analytic proofs
of existence covering all numerically evaluated solutions are given. All
instantons studied have finite action and vanishing energy momentum tensor and
do not disturb the geometry.
|
hep-th astro-ph gr-qc
|
we present several different classes of selfdual yangmills instantons in all even d backgrounds with euclidean signature in d4p2 the only solutions we found are on constant curvature ds and ads backgrounds and are evaluated in closed form in d4p an interesting class of instantons are given on black hole backgrounds one class of solutions are euclidean timeindependent and spherically symmetric in d1 dimensions and the other class are spherically symmetric in all d dimensions some of the solutions in the former class are evaluated numerically all the rest being given in closed form analytic proofs of existence covering all numerically evaluated solutions are given all instantons studied have finite action and vanishing energy momentum tensor and do not disturb the geometry
|
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|
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|
707.1271
|
Sine-Gordon description of Beresinskii-Kosterlitz-Thouless physics at
finite magnetic field
|
The Beresinskii-Kosterlitz-Thouless (BKT) physics of vortices in
two-dimensional superconductors at finite magnetic field is investigated by
means of a field-theoretical approach based on the sine-Gordon model. This
description leads to a straightforward definition of the field-induced
magnetization and shows that the persistence of non-linear effects at low
fields above the transition is a typical signature of the fast divergence of
the correlation length within the BKT theory.
|
cond-mat.supr-con cond-mat.stat-mech
|
the beresinskiikosterlitzthouless bkt physics of vortices in twodimensional superconductors at finite magnetic field is investigated by means of a fieldtheoretical approach based on the sinegordon model this description leads to a straightforward definition of the fieldinduced magnetization and shows that the persistence of nonlinear effects at low fields above the transition is a typical signature of the fast divergence of the correlation length within the bkt theory
|
[['the', 'beresinskiikosterlitzthouless', 'bkt', 'physics', 'of', 'vortices', 'in', 'twodimensional', 'superconductors', 'at', 'finite', 'magnetic', 'field', 'is', 'investigated', 'by', 'means', 'of', 'a', 'fieldtheoretical', 'approach', 'based', 'on', 'the', 'sinegordon', 'model', 'this', 'description', 'leads', 'to', 'a', 'straightforward', 'definition', 'of', 'the', 'fieldinduced', 'magnetization', 'and', 'shows', 'that', 'the', 'persistence', 'of', 'nonlinear', 'effects', 'at', 'low', 'fields', 'above', 'the', 'transition', 'is', 'a', 'typical', 'signature', 'of', 'the', 'fast', 'divergence', 'of', 'the', 'correlation', 'length', 'within', 'the', 'bkt', 'theory']]
|
[-0.16463857905030488, 0.19867377174990392, -0.11295246186930297, 0.09406968658449434, -0.04675752779733, -0.1247875156200755, 0.04928932723297334, 0.29901798622623615, -0.23821018509038572, -0.24206462398227027, 0.007070597259452872, -0.2597445239827259, -0.14433768140013092, 0.1941679091394337, 0.04075711843585456, 0.027634524198165582, -0.07343343187318142, 0.055742403047520726, -0.13235669016295962, -0.1681602904990093, 0.3210077134044424, 0.030866830985047923, 0.35267384886852843, 0.09445979285623822, 0.07933203365181142, -0.02644572990126352, 0.06487614052620397, 0.06024665343088668, -0.16015480410487046, 0.047883502666407556, 0.20801288849298857, -0.026353072117902894, 0.22686396422448443, -0.395917317371315, -0.2627516205547683, 0.02416223954451062, 0.14714130061442282, 0.16630826028647708, -0.04813891964262602, -0.27936673728721356, 0.061009934950453135, -0.12471403655554376, -0.14491606241008684, -0.06772037290398088, 0.0048542659913898625, -0.011694201852069862, -0.24468634415890522, 0.1571911577163125, 0.07777990970878737, 0.15080868405526254, -0.028678774569572796, -0.03478874576820144, 0.00542138981869194, 0.01579689543082643, 0.04720996500083259, 0.06809810550410801, 0.11685770143991087, -0.16859337812247896, -0.1180216980873913, 0.3612997193000655, -0.07046536071253802, -0.10516848492978224, 0.1624589239685004, -0.18783264146394915, -0.07458880729973316, 0.1840971214001748, 0.11181149915305537, 0.10559404342532602, -0.11304066089023627, 0.1046050759201779, -0.013384031667026565, 0.15126429934666227, -0.016821190850364407, 0.016908399385414018, 0.2603752488242601, 0.22703240016725526, 0.012540738341579242, 0.1499308330813117, -0.11031052954633956, -0.15085877813815848, -0.3273746704599306, -0.14370757718084018, -0.21213227227232906, 0.0322739682368823, -0.07882230151110196, -0.23552049168927677, 0.4129219601876033, 0.1809350497075426, 0.17732225059281423, -0.006697566095572799, 0.25153313708533326, 0.15307566973922856, 0.07946622199309405, 0.030773865090293895, 0.2233811985673522, 0.20959924758974907, 0.11919771332933164, -0.3031053175565912, 0.0166160186836079, 0.12785281022704803]
|
707.1272
|
Remarks on the amplitude of the decay Upsilon(3S) -> Upsilon(1S) pi pi
|
We point out some properties of the amplitude of the dipion transition
$\Upsilon(3S) \to \Upsilon(1S) \pi \pi$ in relation to the recently reported
results of a CLEO analysis of form factors in this amplitude. We find that the
reported significant complex phase between two of the form factors under the
assumption that the third form factor is zero, is not consistent with the
picture where the phase shifts arise due to the final state interaction in the
$\pi \pi$ channel. It is also shown that in an analysis that uses no
information on the polarization of both the initial and the final $\Upsilon$
resonances it is impossible in principle to determine all the relevant terms.
We suggest that a study of a simple correlation between the direction of the
total momentum of the two pions and the axis of the initial beams is sufficient
to resolve the ambiguity in the fit for the form factors.
|
hep-ph
|
we point out some properties of the amplitude of the dipion transition upsilon3s to upsilon1s pi pi in relation to the recently reported results of a cleo analysis of form factors in this amplitude we find that the reported significant complex phase between two of the form factors under the assumption that the third form factor is zero is not consistent with the picture where the phase shifts arise due to the final state interaction in the pi pi channel it is also shown that in an analysis that uses no information on the polarization of both the initial and the final upsilon resonances it is impossible in principle to determine all the relevant terms we suggest that a study of a simple correlation between the direction of the total momentum of the two pions and the axis of the initial beams is sufficient to resolve the ambiguity in the fit for the form factors
|
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|
[-0.1421524625444304, 0.14172365188743213, -0.12833007841461128, 0.0769495937522621, -0.03288776169741346, -0.051621642062861114, 0.06423689610354842, 0.3486024666457407, -0.23537726532067021, -0.25872117600614025, 0.02782179228210401, -0.2908793962170039, -0.1267823964357376, 0.16099422316878073, 0.030509256373249714, 0.041785658712709145, 0.07043806913218671, 0.06303933467715979, -0.09023557420249187, -0.17519206605671395, 0.3468473357148468, 0.014419860454396374, 0.27148991626191643, 0.07421135544333787, 0.05005241018089075, 0.002164075714385798, -0.02447125060153344, -0.02093500859074054, -0.13030077874807888, 0.06742952415539373, 0.2048346453875814, 0.09775540040084912, 0.1955691653303802, -0.34725137935771094, -0.11889474486872073, 0.12867955596546732, 0.11675446970959104, 0.11172868247564521, -0.013971247293445612, -0.26661329092157465, 0.09771810842249842, -0.14006306092224774, -0.12244713249946794, -0.06620094686476213, 0.044788237914983785, -0.030944168262724434, -0.28945680093921483, 0.0855113054879175, 0.06879477900933595, 0.007043724933699254, -0.061471940390765666, -0.15223347550077784, -0.019403596357592652, 0.12645947483157918, 0.09249048635003067, 0.0749628530762669, 0.09139653777913942, -0.1469507594352528, -0.09513378257735543, 0.38850836226896895, -0.049989142389817824, -0.2007080023447352, 0.14391826073556477, -0.2091976028506554, -0.12353244401334275, 0.17591259813897553, 0.15744133136505561, 0.055671198442277886, -0.1471142510522998, 0.037382009774897126, -0.0437456551894185, 0.2065299601453702, 0.06902229408583334, 0.04270344756528615, 0.15557912261255324, 0.1136022764228044, 0.021221837185082897, 0.12162353939436857, -0.09182797812315965, -0.10077047174075437, -0.3543955692600819, -0.15781240503514005, -0.13637555346208355, 0.04128986955479524, -0.04631514716574231, -0.12280543304194937, 0.38426774650992407, 0.11031694383690915, 0.28368761602248393, -0.02127817701097698, 0.2911233995620522, 0.13327684712318344, 0.06812640034383344, 0.06916135244462038, 0.30545036558215805, 0.15766477051882014, 0.08554644411009166, -0.27343155894608745, 0.08533332019203133, -0.01375681076859755]
|
707.1273
|
Exotic Searches at the Tevatron
|
Recent results on searches for new physics at Run II of the Tevatron are
reported. The searches cover many different final states and previous hints of
signals, but all analyses have at this point led to negative results.
|
hep-ex
|
recent results on searches for new physics at run ii of the tevatron are reported the searches cover many different final states and previous hints of signals but all analyses have at this point led to negative results
|
[['recent', 'results', 'on', 'searches', 'for', 'new', 'physics', 'at', 'run', 'ii', 'of', 'the', 'tevatron', 'are', 'reported', 'the', 'searches', 'cover', 'many', 'different', 'final', 'states', 'and', 'previous', 'hints', 'of', 'signals', 'but', 'all', 'analyses', 'have', 'at', 'this', 'point', 'led', 'to', 'negative', 'results']]
|
[-0.047706108950813744, 0.13598990542078881, -0.09797248653577346, 0.03822289596887698, -0.08466059713330316, -0.18983377883897015, 0.040490832596429084, 0.3130372755817677, -0.16992206097041307, -0.3783315713272283, 0.11029748682324823, -0.3706358271209817, -0.037121299948347244, 0.25855567281771646, 0.05562759529014951, 0.08874983649308744, 0.15586625099623283, -0.027166297487718493, -0.059933682732088, -0.2875083802071841, 0.26011755814971893, 0.06696846252797466, 0.2489567664942067, 0.11221090135605712, -0.006290001065568312, -0.02644937044303668, -0.15726786033299409, -0.02126039986155535, -0.1536439886771596, 0.049088445937836934, 0.2812862659461404, 0.15977313890317946, 0.19761021675443963, -0.42302253283560276, -0.19549122058149232, 0.13004742187790966, 0.10357547284250981, 0.17261121961239137, -0.14981755878053313, -0.3131935864343847, 0.10904794610350539, -0.12188360701609206, -0.08748751525816165, -0.03829054697416723, 0.013349772381939386, -0.006612446183632863, -0.22623292650831373, 0.016493693349490825, 0.025245087539875193, 0.042588067093962116, -0.03423922850235708, -0.29950131260250745, 0.022449056740458075, 0.09089659633556087, 0.07916719987253218, 0.022079172127537038, 0.10976111276173278, -0.18066635675801845, -0.2662292544386889, 0.2737174724767867, -0.011095867002088772, -0.09235151636561281, 0.3415660528760207, -0.23093215107770734, -0.25233225294045714, 0.15094933011814168, 0.23055953469960705, 0.06348657420542288, -0.12426897037872359, 0.09301252302707565, -0.032652473077178, 0.08950465011156139, 0.055325748925832544, 0.07150374193014086, 0.24497473053634167, 0.15143259472556805, 0.05194483663562048, 0.008199131275576196, -0.11082889827115364, -0.06237249121707129, -0.37113299463893973, -0.07324857617679395, -0.10306725293508191, -0.03789233957956496, 0.02322450047397165, -0.05936917797417233, 0.43756526865457235, 0.15899572742024534, 0.2671140178449844, 0.039594634289019985, 0.2405626045932111, 0.05617500750936175, 0.0885069848430392, 0.03128674001383938, 0.3434368018183465, 0.023283820795385463, 0.17278525505312964, -0.11927421871376664, 0.07680033043480332, -0.03201816066192757]
|
707.1274
|
Some intersection numbers of divisors on toroidal compactifications of
A_g
|
We study the top intersection numbers of the boundary and Hodge class
divisors on toroidal compactifications of the moduli space $A_g$ of principally
polarized abelian varieties and compute those numbers that live away from the
stratum which lies over the closure of $A_{g-3}$ in the Satake
compactification.
|
math.AG
|
we study the top intersection numbers of the boundary and hodge class divisors on toroidal compactifications of the moduli space a_g of principally polarized abelian varieties and compute those numbers that live away from the stratum which lies over the closure of a_g3 in the satake compactification
|
[['we', 'study', 'the', 'top', 'intersection', 'numbers', 'of', 'the', 'boundary', 'and', 'hodge', 'class', 'divisors', 'on', 'toroidal', 'compactifications', 'of', 'the', 'moduli', 'space', 'a_g', 'of', 'principally', 'polarized', 'abelian', 'varieties', 'and', 'compute', 'those', 'numbers', 'that', 'live', 'away', 'from', 'the', 'stratum', 'which', 'lies', 'over', 'the', 'closure', 'of', 'a_g3', 'in', 'the', 'satake', 'compactification']]
|
[-0.23046670171796627, 0.15573860059046876, -0.11293218692805132, 0.08943540594823983, -0.10007674779500002, -0.040201042211898, 0.02965009835568945, 0.25048943171682564, -0.35480581811102835, -0.19771696239932562, 0.11230566124077482, -0.20722554184739356, -0.09690966389303945, 0.2521037748488395, -0.18405703941117163, -0.08963557766021593, 0.008619612280238905, 0.05025838945141953, -0.06939816978031202, -0.31751057335540006, 0.5138854232171307, -0.12094406477864021, 0.29674506855561683, 0.024379543474187023, 0.05064502010202926, -0.030924093995607742, -0.019372731325742992, -0.052307746525595736, -0.1273719038386923, 0.23531549878458938, 0.3030265909822091, 0.039962982701937384, 0.05768843818172489, -0.3967736355312493, -0.12697394665978526, 0.2425814970072521, 0.08182935750759814, -0.01397539528704289, 0.11847304924057149, -0.21789526790329863, 0.07147809915730487, -0.11617908121147395, -0.1979766453049429, -0.05932195249782956, 0.05563007549220777, 0.018357291832849707, -0.1460083721043623, -0.10459463865212772, 0.0030776576908386273, 0.2031796986835695, -0.09433852715174788, -0.1407296078927491, -0.18513002327602843, -0.011540856637546549, 0.07280219830041144, 0.0543807740677553, 0.13153955139948623, -0.18118675433747147, -0.06910103759930833, 0.3745655410558633, -0.03859357151162365, -0.16824540769195426, 0.10595191782340407, -0.23288737970363835, -0.11777781706262866, 0.1921293590541767, 0.1323110010150982, 0.2393767079743354, 0.12189050043082755, 0.2355266888600612, -0.18153677410800415, 0.04561246004279541, 0.14645463811314624, -0.028157060409126723, 0.20149113462590004, 0.10327902402850273, 0.041084537748247385, 0.11310630676377079, -0.10394131803237226, -0.09280202643054983, -0.4608779259673927, -0.16877309070981067, -0.09583997999763359, 0.16479564734491642, -0.11546427489235572, -0.19796998995187334, 0.42165967841308727, 0.036333114738859563, 0.19153156815825598, 0.0908184775743512, 0.22617723517443822, -0.039399640371456095, 0.06475050427505503, 0.045304375804414085, 0.15496795351171624, 0.2392010671167594, -0.057503240327249565, -0.17820649294931765, -0.07329239348030608, 0.26802253955975175]
|
707.1275
|
Radiative return physics program within EURIDICE network
|
A short review of both theoretical and experimental aspects of the radiative
return method is presented with the emphasize on the results obtained within
the EURIDICE network. It is shown that the method gives not only possibility of
an independent from the scan method measurement of the hadronic cross section,
but also can provide information concerning details of the hadronic
interactions.
|
hep-ph hep-ex
|
a short review of both theoretical and experimental aspects of the radiative return method is presented with the emphasize on the results obtained within the euridice network it is shown that the method gives not only possibility of an independent from the scan method measurement of the hadronic cross section but also can provide information concerning details of the hadronic interactions
|
[['a', 'short', 'review', 'of', 'both', 'theoretical', 'and', 'experimental', 'aspects', 'of', 'the', 'radiative', 'return', 'method', 'is', 'presented', 'with', 'the', 'emphasize', 'on', 'the', 'results', 'obtained', 'within', 'the', 'euridice', 'network', 'it', 'is', 'shown', 'that', 'the', 'method', 'gives', 'not', 'only', 'possibility', 'of', 'an', 'independent', 'from', 'the', 'scan', 'method', 'measurement', 'of', 'the', 'hadronic', 'cross', 'section', 'but', 'also', 'can', 'provide', 'information', 'concerning', 'details', 'of', 'the', 'hadronic', 'interactions']]
|
[-0.047450654086424036, 0.08760922739190088, -0.12505069198571922, 0.05328038844357555, -0.031294485088437796, -0.08472690283767102, 0.029270177846774457, 0.35016828731944166, -0.22639336343854666, -0.29661657148972154, 0.0643661535034577, -0.27297492399811746, -0.1143461402039975, 0.2459088654878239, 0.010235208346663664, 0.027233041209789612, 0.14002707186931124, 0.07226914008739792, -0.056221562852927794, -0.24027861698996275, 0.298454907660683, 0.09420104576274753, 0.2672018782546123, 0.19140113294900704, 0.09201029752536366, 0.01350846136144052, -0.13113557108057042, -0.006913826771778986, -0.1455385470342056, 0.1227159520611167, 0.20350011568516493, 0.14155232370915957, 0.1974929604679346, -0.40750361600269874, -0.18179787347714108, 0.039682262732336916, 0.11853808046629032, 0.14510050903384883, -0.05112812661294205, -0.2827772537168736, 0.0609216795846199, -0.1676184903751467, -0.07860052394680679, -0.10946301923443874, -0.02702604845010986, 0.018959533643813604, -0.2517007110562796, 0.04920441098074661, 0.06767655983567238, -0.008409843997408946, -0.052530271152500065, -0.14706647164809208, 0.006513008785744508, 0.11245228461921215, 0.08370786721352488, 0.020539004780584947, 0.11412628659357628, -0.11941599779917549, -0.1259908284371098, 0.4027919019882878, -0.020124227472115307, -0.196980863964806, 0.15415984860931833, -0.15835324400104583, -0.11747886452746267, 0.1636818706523627, 0.14741846262477337, 0.10397986278015499, -0.16590858496492727, 0.07271849897127443, -0.042967246977301934, 0.17834271714091302, -0.04217440799887603, 0.04419050546518217, 0.17028645219591756, 0.21693300516344607, 0.012939688004553317, 0.09424591437370206, -0.10570953568676486, -0.0924927132592226, -0.3985356083915879, -0.11359595819376408, -0.16778778360846142, 0.018072851813485613, -0.054822696085466305, -0.13282027057769785, 0.4241077737417072, 0.1859538106325393, 0.22543910461633157, 0.02844023276120424, 0.34380826459576685, 0.06485079359263182, 0.03421799272764474, 0.03864627298898995, 0.31276206198769313, 0.1394175575580448, 0.11701570028283943, -0.21462248454724128, 0.11265391499424975, 0.045637103154634436]
|
707.1276
|
Quantitative implications of the secondary role of carbon dioxide
climate forcing in the past glacial-interglacial cycles for the likely future
climatic impacts of anthropogenic greenhouse-gas forcings
|
A review of the recent refereed literature fails to confirm quantitatively
that carbon dioxide (CO2) radiative forcing was the prime mover in the changes
in temperature, ice-sheet volume, and related climatic variables in the glacial
and interglacial periods of the past 650,000 years, even under the "fast
response" framework where the convenient if artificial distinction between
forcing and feedback is assumed. Atmospheric CO2 variations generally follow
changes in temperature and other climatic variables rather than preceding them.
Likewise, there is no confirmation of the often-posited significant supporting
role of methane (CH4) forcing, which despite its faster atmospheric response
time is simply too small, amounting to less than 0.2 W/m2 from a change of 400
ppb. We cannot quantitatively validate the numerous qualitative suggestions
that the CO2 and CH4 forcings that occurred in response to the Milankovich
orbital cycles accounted for more than half of the amplitude of the changes in
the glacial/interglacial cycles of global temperature, sea level, and ice
volume. Consequently, we infer that natural climatic variability notably the
persistence of insolation forcing at key seasons and geographical locations,
taken with closely-related thermal, hydrological, and cryospheric changes (such
as the water vapor, cloud, and ice-albedo feedbacks) suffices in se to explain
the proxy-derived, global and regional, climatic and environmental
phase-transitions in the paleoclimate. If so, it may be appropriate to place
anthropogenic greenhouse-gas emissions in context by separating their
medium-term climatic impacts from those of a host of natural forcings and
feedbacks that may, as in paleoclimatological times, prove just as significant.
|
physics.geo-ph physics.ao-ph
|
a review of the recent refereed literature fails to confirm quantitatively that carbon dioxide co2 radiative forcing was the prime mover in the changes in temperature icesheet volume and related climatic variables in the glacial and interglacial periods of the past 650000 years even under the fast response framework where the convenient if artificial distinction between forcing and feedback is assumed atmospheric co2 variations generally follow changes in temperature and other climatic variables rather than preceding them likewise there is no confirmation of the oftenposited significant supporting role of methane ch4 forcing which despite its faster atmospheric response time is simply too small amounting to less than 02 wm2 from a change of 400 ppb we cannot quantitatively validate the numerous qualitative suggestions that the co2 and ch4 forcings that occurred in response to the milankovich orbital cycles accounted for more than half of the amplitude of the changes in the glacialinterglacial cycles of global temperature sea level and ice volume consequently we infer that natural climatic variability notably the persistence of insolation forcing at key seasons and geographical locations taken with closelyrelated thermal hydrological and cryospheric changes such as the water vapor cloud and icealbedo feedbacks suffices in se to explain the proxyderived global and regional climatic and environmental phasetransitions in the paleoclimate if so it may be appropriate to place anthropogenic greenhousegas emissions in context by separating their mediumterm climatic impacts from those of a host of natural forcings and feedbacks that may as in paleoclimatological times prove just as significant
|
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|
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|
707.1277
|
Infall and accretion
|
Gas infall and accretion play a fundamental role in galaxy formation, and
several processes of accretion are reviewed. In particular the cold accretion
may solve to some extent the angular momentum problem in disk formation, while
it is aggravated by mergers. Gas accretion is one of the main actor in secular
evolution: it is required to account for recurrent bar formation, and to
explain the feedback cycles of formation of bulges and black holes, with
correlated masses. Infall is also required to fuel a regular and almost
stationary star formation history. Star formation is quenched for galaxy in
clusters when gas accretion is suppressed through stripping. The central
brighter central galaxy can benefit however of gas accretion through cooling
flows, moderated by AGN feedback. Hot and cold feedback scenarios can be
considered, to account for a stationary cooling flow, and explain the
filamentary CO and Halpha observed structures.
|
astro-ph
|
gas infall and accretion play a fundamental role in galaxy formation and several processes of accretion are reviewed in particular the cold accretion may solve to some extent the angular momentum problem in disk formation while it is aggravated by mergers gas accretion is one of the main actor in secular evolution it is required to account for recurrent bar formation and to explain the feedback cycles of formation of bulges and black holes with correlated masses infall is also required to fuel a regular and almost stationary star formation history star formation is quenched for galaxy in clusters when gas accretion is suppressed through stripping the central brighter central galaxy can benefit however of gas accretion through cooling flows moderated by agn feedback hot and cold feedback scenarios can be considered to account for a stationary cooling flow and explain the filamentary co and halpha observed structures
|
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|
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|
707.1278
|
Inducement and suppression of Coulomb effects in elastic 2D-2D electron
tunnelling in a quantizing magnetic field
|
Tunnelling between two-dimensional electron systems has been studied in the
magnetic field perpendicular to the systems planes. The satellite conductance
peaks of the main resonance have been observed due to the electron tunnelling
assisted by the elastic scattering on impurities in the barrier layer. These
peaks are shown to shift to the higher voltage due to the Coulomb pseudogap in
the intermediate fields. In the high magnetic fields the pseudogap shift is
disappeared.
|
cond-mat.mes-hall cond-mat.supr-con
|
tunnelling between twodimensional electron systems has been studied in the magnetic field perpendicular to the systems planes the satellite conductance peaks of the main resonance have been observed due to the electron tunnelling assisted by the elastic scattering on impurities in the barrier layer these peaks are shown to shift to the higher voltage due to the coulomb pseudogap in the intermediate fields in the high magnetic fields the pseudogap shift is disappeared
|
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|
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|
707.1279
|
Toward Understanding Massive Star Formation
|
Although fundamental for astrophysics, the processes that produce massive
stars are not well understood. Large distances, high extinction, and short
timescales of critical evolutionary phases make observations of these processes
challenging. Lacking good observational guidance, theoretical models have
remained controversial. This review offers a basic description of the collapse
of a massive molecular core and a critical discussion of the three competing
concepts of massive star formation:
- monolithic collapse in isolated cores
- competitive accretion in a protocluster environment
- stellar collisions and mergers in very dense systems
We also review the observed outflows, multiplicity, and clustering properties
of massive stars, the upper initial mass function and the upper mass limit. We
conclude that high-mass star formation is not merely a scaled-up version of
low-mass star formation with higher accretion rates, but partly a mechanism of
its own, primarily owing to the role of stellar mass and radiation pressure in
controlling the dynamics.
|
astro-ph
|
although fundamental for astrophysics the processes that produce massive stars are not well understood large distances high extinction and short timescales of critical evolutionary phases make observations of these processes challenging lacking good observational guidance theoretical models have remained controversial this review offers a basic description of the collapse of a massive molecular core and a critical discussion of the three competing concepts of massive star formation monolithic collapse in isolated cores competitive accretion in a protocluster environment stellar collisions and mergers in very dense systems we also review the observed outflows multiplicity and clustering properties of massive stars the upper initial mass function and the upper mass limit we conclude that highmass star formation is not merely a scaledup version of lowmass star formation with higher accretion rates but partly a mechanism of its own primarily owing to the role of stellar mass and radiation pressure in controlling the dynamics
|
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|
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|
707.128
|
Dynamics of Exozodiacal Clouds
|
The inner Solar System contains a cloud of small (1-100 micron) dust grains
created when small bodies-asteroids, comets, and Kuiper belt objects-collide
and outgas. This dust cloud, the zodiacal cloud probably has extrasolar
analogs, exozodiacal clouds. Exozodiacal clouds are related to debris disks,
clouds of rocks and dust orbiting main sequence stars thought to represent the
debris left over from planet formation. Some debris disks appear to contain
distinct inner clouds that could be considered massive exozodiacal clouds (e.g.
Koerner et al. 1998, Absil et al. 2006). This white paper addresses the need
for future theoretical work on the dynamics of exozodiacal clouds. This
theoretical work should help us discover new planets and understand exozodiacal
clouds as astrophysical noise. So far, observations of nearby stars have not
provided good constraints on the structures of exozodiacal clouds. But future
observations probably will demand a better theoretical understanding of these
systems.
|
astro-ph
|
the inner solar system contains a cloud of small 1100 micron dust grains created when small bodiesasteroids comets and kuiper belt objectscollide and outgas this dust cloud the zodiacal cloud probably has extrasolar analogs exozodiacal clouds exozodiacal clouds are related to debris disks clouds of rocks and dust orbiting main sequence stars thought to represent the debris left over from planet formation some debris disks appear to contain distinct inner clouds that could be considered massive exozodiacal clouds eg koerner et al 1998 absil et al 2006 this white paper addresses the need for future theoretical work on the dynamics of exozodiacal clouds this theoretical work should help us discover new planets and understand exozodiacal clouds as astrophysical noise so far observations of nearby stars have not provided good constraints on the structures of exozodiacal clouds but future observations probably will demand a better theoretical understanding of these systems
|
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|
[-0.09683305691959786, 0.113376105571535, -0.07696046406595872, 0.10199737267584764, -0.12171276352360266, 0.0049019676986439475, 0.04329255937662875, 0.35038361577638266, -0.1884171265891978, -0.3683520198366123, 0.04163660808016771, -0.28659359484525593, -0.08253782157111784, 0.16518611117940524, -0.18900821148578462, 0.04509455198181215, 0.11642867386469553, -0.19597751279080544, 0.11120836376051964, -0.3354055545806628, 0.30403485708259814, 0.15007205388894113, 0.00041359291122905137, -0.03043103354123967, -0.0033441694316871723, -0.2064019860940632, -0.06459704898618933, -0.10160543149144485, -0.21891615946184048, 0.0917269081262679, 0.26577593648549297, 0.15281071749612174, 0.19061948917806149, -0.4546063257188633, -0.29300019311044234, 0.0819657390086173, 0.2035862922013119, 0.013861714130074813, -0.04046154468609341, -0.30076446151039726, 0.08057858163474835, -0.17581073144563183, -0.22102472829985723, 0.0552643361405052, 0.1030085785892503, 0.027375465752717494, -0.23004337140712244, 0.025399648338748977, 0.09881083403938803, 0.13836328946053983, -0.11805412311684982, -0.1698035587805548, -0.03199161733982378, 0.08298007912134976, -0.029120345797453973, 0.024348378644710213, 0.26756412750752323, -0.0898620874394165, -0.005600206764286448, 0.4521307695885831, -0.04695333962425076, 0.010783276092742794, 0.3251583092757661, -0.22168081590970015, -0.1667555816535806, 0.1672922233569211, 0.20755531057586957, 0.1231587685949715, -0.1818446727073149, 0.017006147779717012, -0.10968427587107851, 0.16790358379868597, 0.12431781321025358, 0.12334430148375446, 0.47389474197708326, 0.0859045979952247, 0.03323869888574399, 0.0870428806869313, -0.22444472860282483, -0.10946908325422555, -0.15024755534170003, -0.13509296646566482, -0.16849918545320117, 0.06306327307638954, -0.07777135652401646, -0.1167745398999802, 0.21547188228959668, 0.1888747494475081, 0.20660056646527916, -0.039431933663657, 0.36010443335961034, -0.019022545749161006, 0.0946732446840354, 0.17961443112199676, 0.2927941294942966, 0.09808877658355852, 0.1379531198719131, -0.1775810520594201, 0.12502581902964297, -0.055598187268358364]
|
707.1281
|
Knotted Polyhedral Tori
|
For every knot K with stick number k there is a knotted polyhedral torus of
knot type K with 3k vertices. We prove that at least 3k-2 vertices are
necessary.
|
math.MG math.CO
|
for every knot k with stick number k there is a knotted polyhedral torus of knot type k with 3k vertices we prove that at least 3k2 vertices are necessary
|
[['for', 'every', 'knot', 'k', 'with', 'stick', 'number', 'k', 'there', 'is', 'a', 'knotted', 'polyhedral', 'torus', 'of', 'knot', 'type', 'k', 'with', '3k', 'vertices', 'we', 'prove', 'that', 'at', 'least', '3k2', 'vertices', 'are', 'necessary']]
|
[-0.31048843897103023, 0.21472637532278896, -0.0689349173771916, -0.045546195202041416, -0.14763967708374062, -0.30612714649178085, 0.05104398332381, 0.4144122788061698, -0.23404333123471588, -0.29711246596028407, 0.031132981662328044, -0.3455329309993734, -0.11677691697453459, 0.03467923818777005, -0.05349600094680985, -0.08800603399674098, 0.08210181435570121, 0.17378217701334506, 0.04910317607379208, -0.338818498638769, 0.26018800954334437, -0.16777083019260317, 0.016375178781648476, 0.09234141781926156, 0.0833574107537667, -0.02194577008485794, 0.08714844596882661, 0.08282624433437984, -0.29009404080885964, 0.01695482925667117, 0.32446045937637485, 0.0913913158311819, 0.1649093850593393, -0.3759072242411397, -0.1481634725574016, 0.23610652054970463, 0.09917290680265675, -0.04573126447697481, 0.030029241577722132, -0.11838322360999882, 0.1887492701721688, 0.02793924572567145, -0.20065290185933313, 0.014696294628083705, 0.1677830025786534, -0.008877399998406569, -0.1968594145650665, -0.059413831246395904, 0.07613064864029487, 0.163798866327852, 0.12771879790040355, -0.24770223793263238, -0.09248094405047595, 0.05241215584295181, -0.032692728416683775, 0.1614366906384627, 0.026955315189358467, -0.08833463232343396, -0.15506813370933134, 0.3671173509210348, -0.019563390283534925, -0.1156068227874736, 0.18114593227704365, -0.16082667307928206, -0.23153624365416667, 0.3562197357416153, -0.0015541652838389078, 0.16702126537760098, -0.014977764151990414, 0.09722550474107265, -0.233402876680096, 0.14276469685137272, 0.17636477750105162, -0.033326476734752454, 0.15987686620404323, 0.06440711471562584, 0.18493584940830868, 0.2015252372715622, -0.02683466871579488, 0.08726317621767521, -0.39050178080797193, -0.19122368339449167, -0.2119766858716806, 0.13660518182441592, -0.21544343318479756, -0.1106081339220206, 0.2682101434717576, -0.011381635380287965, 0.19778280307849247, 0.13946815726715917, 0.17133508581512918, -0.004998881299979985, 0.06924768965691327, 0.2710953001088152, 0.03788396157324314, 0.15638252537076672, -0.10003583778937658, -0.1119509860718002, -0.019400533614680172, 0.26125800057003895]
|
707.1282
|
Statistical Model Predictions for p-p and Pb-Pb collisions at LHC
|
Predictions for particle production at LHC are discussed in the context of
the statistical model. Moreover, the capability of particle ratios to determine
the freeze-out point experimentally is studied, and the best suited ratios are
specified. Finally, canonical suppression in p-p collisions at LHC energies is
discussed in a cluster framework. Measurements with p-p collisions will allow
us to estimate the strangeness correlation volume and to study its evolution
over a large range of incident energies.
|
hep-ph
|
predictions for particle production at lhc are discussed in the context of the statistical model moreover the capability of particle ratios to determine the freezeout point experimentally is studied and the best suited ratios are specified finally canonical suppression in pp collisions at lhc energies is discussed in a cluster framework measurements with pp collisions will allow us to estimate the strangeness correlation volume and to study its evolution over a large range of incident energies
|
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|
[-0.04057927143233093, 0.17972034632571435, -0.11150718504857075, 0.14012196460603982, 0.016204222950986343, -0.10018069705754322, -0.02413056643777772, 0.3553952002272892, -0.20461596878196456, -0.3247662594688958, -0.007889809857404447, -0.32470289834676996, 0.03444821829524651, 0.15250121516567705, 0.05601937817348363, 0.10290943644864264, 0.11244585355253596, 0.020094935883351258, -0.055270359900436904, -0.22391462167970053, 0.2614512695551017, 0.17791651223639124, 0.23977479853630557, 0.16689393133856356, 0.05809594522916565, 0.04165669865170984, -0.04955887955254998, 0.011521227045082733, -0.1738656944117362, 0.068308607473706, 0.30304895660006687, 0.08315176665047674, 0.13964493158518484, -0.3448909413755724, -0.13440781796204024, 0.15878059923354731, 0.12980102609205796, 0.10406720779505313, -0.029657317386744052, -0.2028244869097283, 0.13645946010499183, -0.19557148240212546, -0.1761577846727481, -0.05221157109266833, 0.027217257792424215, 0.04156702529871836, -0.30847159633412957, 0.0760267742505101, -0.055764308934541124, 0.06645164378048656, -0.03887230926040119, -0.15525906265553968, -0.04109568522605849, 0.018159653011121248, 0.03808061521053069, 0.026580554718078162, 0.2037334766753606, -0.13515579980173098, -0.1370565688940635, 0.4171333077216619, -0.01094718390882726, -0.14604513270866223, 0.23002928964131952, -0.1982954848974355, -0.14343312178052178, 0.14644490363762566, 0.24849316899934293, 0.07187948913901653, -0.2154792085486023, 0.07077824248239938, 0.02656947529727691, 0.12617667712842567, 0.07618958775052115, 0.05008990411021698, 0.19877069610122003, 0.2118651864216908, 0.00646231417838288, 0.08801927318793452, -0.1481072940667601, -0.1337695972944953, -0.38821980249332755, -0.10470396345236192, -0.12327370219128697, -0.014178422000871873, -0.06911548997212728, -0.033924330546716716, 0.3682550550683549, 0.16313174987628468, 0.2754802129623529, 0.027220033516641706, 0.24876955078032456, 0.11290538250805664, 0.02885761959968429, 0.04147204110019007, 0.30057556376375844, 0.17324527443729734, 0.1784377037287126, -0.23671214647076436, 0.06344774261876744, 0.027232966266302883]
|
707.1283
|
Antikaons and hyperons in nuclear matter with saturation
|
We evaluate the antikaon and hyperon spectral functions in a self-consistent
and covariant many-body approach. The computation is based on coupled-channel
dynamics derived from the chiral SU(3) Lagrangian. A novel subtraction scheme
is developed that avoids kinematical singularities and medium-induced power
divergencies all together. Scalar and vector mean fields are used to model
nuclear binding and saturation. The effect of the latter is striking for the
antikaon spectral function that becomes significantly more narrow at small
momenta. Attractive mass shifts of about 30 and 40 MeV are predicted for the
Lambda(1405) and Sigma(1385) resonances. Once scalar and vector mean fields for
the nucleon are switched on the Lambda(1520) resonances dissolves almost
completely in nuclear matter. All together only moderate attraction is
predicted for the nuclear antikaon systems at saturation density. However, at
larger densities we predict a sizable population of soft antikaon modes that
arise from the coupling of the antikaon to a highly collective Lambda(1115)
nucleon-hole state. This may lead to the formation of exotic nuclear systems
with strangeness and antikaon condensation in compact stars at moderate
densities.
|
nucl-th
|
we evaluate the antikaon and hyperon spectral functions in a selfconsistent and covariant manybody approach the computation is based on coupledchannel dynamics derived from the chiral su3 lagrangian a novel subtraction scheme is developed that avoids kinematical singularities and mediuminduced power divergencies all together scalar and vector mean fields are used to model nuclear binding and saturation the effect of the latter is striking for the antikaon spectral function that becomes significantly more narrow at small momenta attractive mass shifts of about 30 and 40 mev are predicted for the lambda1405 and sigma1385 resonances once scalar and vector mean fields for the nucleon are switched on the lambda1520 resonances dissolves almost completely in nuclear matter all together only moderate attraction is predicted for the nuclear antikaon systems at saturation density however at larger densities we predict a sizable population of soft antikaon modes that arise from the coupling of the antikaon to a highly collective lambda1115 nucleonhole state this may lead to the formation of exotic nuclear systems with strangeness and antikaon condensation in compact stars at moderate densities
|
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|
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|
707.1284
|
Magnetic strings in Lattice QCD as Nonabelian Vortices
|
Lattice studies indicate existence of magnetic strings in QCD vacuum. We
argue that recently found nonabelian strings with rich worldsheet dynamics
provide a proper pattern for the strings observed on the lattice. In
particular, within this pattern we explain the localization of the
monopole-antimonopole pairs on the magnetic string worldsheet and the negative
contribution of the magnetic strings into the vacuum energy and gluon
condensate. We suggest the D2 brane realization of the magnetic string which
explains the temperature dependence of its tension.
|
hep-th hep-lat hep-ph
|
lattice studies indicate existence of magnetic strings in qcd vacuum we argue that recently found nonabelian strings with rich worldsheet dynamics provide a proper pattern for the strings observed on the lattice in particular within this pattern we explain the localization of the monopoleantimonopole pairs on the magnetic string worldsheet and the negative contribution of the magnetic strings into the vacuum energy and gluon condensate we suggest the d2 brane realization of the magnetic string which explains the temperature dependence of its tension
|
[['lattice', 'studies', 'indicate', 'existence', 'of', 'magnetic', 'strings', 'in', 'qcd', 'vacuum', 'we', 'argue', 'that', 'recently', 'found', 'nonabelian', 'strings', 'with', 'rich', 'worldsheet', 'dynamics', 'provide', 'a', 'proper', 'pattern', 'for', 'the', 'strings', 'observed', 'on', 'the', 'lattice', 'in', 'particular', 'within', 'this', 'pattern', 'we', 'explain', 'the', 'localization', 'of', 'the', 'monopoleantimonopole', 'pairs', 'on', 'the', 'magnetic', 'string', 'worldsheet', 'and', 'the', 'negative', 'contribution', 'of', 'the', 'magnetic', 'strings', 'into', 'the', 'vacuum', 'energy', 'and', 'gluon', 'condensate', 'we', 'suggest', 'the', 'd2', 'brane', 'realization', 'of', 'the', 'magnetic', 'string', 'which', 'explains', 'the', 'temperature', 'dependence', 'of', 'its', 'tension']]
|
[-0.1895897964195135, 0.2383333364984088, -0.09009320015671203, 0.12699927724841759, -0.052553566082952974, -0.05091162896659001, 0.036130450060030066, 0.34282488668763855, -0.20071092622736134, -0.25203511185091304, 0.007361540681660086, -0.254680051546858, -0.09686678019632776, 0.10393294853618346, 0.02095781357857926, -0.003779039040056383, 0.010266786690868706, 0.09393010296086017, -0.04068144627409168, -0.24137234431971988, 0.33998058398579617, 0.011037718336355973, 0.3492127643836415, 0.14783301799142934, 0.08250866888135851, -0.02457324040952666, 0.00035862861403140677, 0.029310743638639707, -0.1553275550384087, 0.0798712636018733, 0.14684569518115506, 0.023591278199420637, 0.05909482891256192, -0.490051939522466, -0.23304549422878099, 0.07136801714414215, 0.17153107116268163, 0.2002417737357206, -0.06652291746619325, -0.27608784845839424, 0.07835066994772776, -0.0932540492468839, -0.14159251985011106, -0.07046058059232421, 0.03918253515948014, -0.0322614025145051, -0.22008559065141592, 0.06377515810154692, 0.052592263063303675, 0.039958862700017105, -0.09657188528638154, -0.08765634611608034, -0.03606057234938784, 0.04828386625319899, 0.14880672038858195, 0.1227559297603656, 0.12129603496876108, -0.20434328915652292, -0.15796923732766546, 0.3562808458480131, -0.06844595902745264, -0.15022421846480435, 0.11643110990456967, -0.18952216965943036, -0.16396268606410327, 0.12558117275496564, 0.09126082751675542, 0.09733436444594738, -0.09876139016530242, 0.15809263257416392, -0.060269819979320266, 0.16785781846258296, 0.10064207988297455, 0.09007513878519187, 0.3572378651160433, 0.16159553370012128, -0.01888260474226561, 0.18859660758984736, -0.08262325093221672, -0.11619127621447825, -0.36536626542458334, -0.0907587322170835, -0.14909955126469035, 0.07565017681322005, -0.12916925203592336, -0.24834608310743808, 0.3677672177710267, 0.14085940204291458, 0.23242892229267542, -0.026846152400676476, 0.20303459259602857, 0.05553863148123632, 0.06036340822858444, 0.048392518799392936, 0.23836564391862647, 0.14739346295505404, 0.12389715171856694, -0.34866719089829956, -0.08977781480924417, 0.1226021443957923]
|
707.1285
|
Second-order QCD corrections to the thrust distribution
|
We compute the next-to-next-to-leading order (NNLO) QCD corrections to the
thrust distribution in electron-positron annihilation. The corrections turn out
to be sizable, enhancing the previously known next-to-leading order prediction
by about 15%. Inclusion of the NNLO corrections significantly reduces the
theoretical renormalisation scale uncertainty on the prediction of the thrust
distribution.
|
hep-ph
|
we compute the nexttonexttoleading order nnlo qcd corrections to the thrust distribution in electronpositron annihilation the corrections turn out to be sizable enhancing the previously known nexttoleading order prediction by about 15 inclusion of the nnlo corrections significantly reduces the theoretical renormalisation scale uncertainty on the prediction of the thrust distribution
|
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|
[-0.07524436638763576, 0.11283604451911707, -0.12452043115398755, 0.1648403059545101, -0.06950932195154476, 0.028761481277315933, 0.0434473095206069, 0.28700855951391013, -0.1946786990316183, -0.3271112745883418, -0.004876487306319177, -0.38740245255130323, 0.060213880001695134, 0.10504820577654184, 0.04799108934022632, 0.1824232726266571, 0.046154443096990384, -0.012289545699661853, -0.0871547371623855, -0.2897384720763155, 0.2949581700651085, 0.15844824336761354, 0.20354424761243017, 0.21015232370472423, -0.0015564236936031603, -0.0011695145684130052, -0.1439340859286341, -0.07543644049734462, -0.14461391926834397, 0.0924081072649535, 0.20184900224501012, -0.08165346863040444, 0.1569558082641486, -0.3332613976124455, -0.11413603889591553, 0.07132011427607972, 0.1696522781698435, 0.17982643764173867, 0.026753901711701618, -0.26721306554242674, 0.09352684451047988, -0.331209924797911, -0.14809049148222103, -0.15840143016448208, -0.03720830158129627, -0.07772276888364087, -0.3283047152810967, 0.04461820102205463, -0.006023784186325821, -0.07928268459862937, 0.057238488841582745, -0.17153141965322635, -0.07143037302383021, 0.11029338796495222, 0.14656917427155172, 0.12670622090352515, 0.20705557991659232, -0.2467522891420944, -0.20186956442308193, 0.4713240820987552, -0.05506937613473365, -0.13615250090758005, -0.016005940694252357, -0.25687691037013544, -0.13980120960988252, 0.2322320264864567, 0.2552371367757373, 0.09739209457720611, -0.16736144409971496, 0.1341437884770772, 0.09935591704047778, 0.19410723177533523, 0.08557460422390233, -0.0050311876990485425, 0.1250104102141717, 0.13863768202124857, -0.0088515505194664, 0.04744415921752578, -0.07520853922994551, -0.16676731055200683, -0.45360057275084886, -0.03015522788479632, -0.047406285763809494, 0.047910983044215864, -0.1945060554745735, -0.12168529469008539, 0.3621991314906992, 0.2712326540666468, 0.22726528369821608, 0.10463483173254073, 0.39055512998910513, 0.19764653715651995, 0.16612169215930442, 0.07930529606985111, 0.3578749995897798, 0.15880145854316652, 0.06425959472635798, -0.3176203671404544, 0.09432725040424689, 0.10211453785864162]
|
707.1286
|
Light 1-+ exotics: molecular resonances
|
Highlights in the search for nonconventional (non qqbar) meson states are the
pi_1(1400) and pi_1(1600) exotic candidates. Should they exist, mounting
theoretical arguments suggest that they are tetraquark molecular resonances
excitable by meson rescattering.
We report a new tetraquark calculation within a model field theory
approximation to Quantum Chromodynamics in the Coulomb gauge supporting this
conjecture. We also strengthen this claim by consistently contrasting results
with exotic state predictions for hybrid (q qbar g) mesons within the same
theoretical framework.
Our findings confirm that molecular-like configurations involving two color
singlets (a resonance, not a bound state) are clearly favored over hybrid or
color-exotic tetraquark meson (q qbar q qbar atoms) formation.
Finally, to assist needed further experimental searches we document a useful
off-plane correlator for establishing the structure of these exotic systems
along with similar, but anticipated much narrower, states that should exist in
the charmonium and bottomonium spectra.
|
hep-ph
|
highlights in the search for nonconventional non qqbar meson states are the pi_11400 and pi_11600 exotic candidates should they exist mounting theoretical arguments suggest that they are tetraquark molecular resonances excitable by meson rescattering we report a new tetraquark calculation within a model field theory approximation to quantum chromodynamics in the coulomb gauge supporting this conjecture we also strengthen this claim by consistently contrasting results with exotic state predictions for hybrid q qbar g mesons within the same theoretical framework our findings confirm that molecularlike configurations involving two color singlets a resonance not a bound state are clearly favored over hybrid or colorexotic tetraquark meson q qbar q qbar atoms formation finally to assist needed further experimental searches we document a useful offplane correlator for establishing the structure of these exotic systems along with similar but anticipated much narrower states that should exist in the charmonium and bottomonium spectra
|
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|
[-0.1168647461454384, 0.25861663629326065, -0.13507515888478658, 0.17198238216027478, -0.07007696597999735, -0.19835578718512142, 0.11144194328241881, 0.3794100959281865, -0.11499845648713007, -0.22151750808178977, -0.0759557333760706, -0.2968587320584275, -0.08370955046455099, 0.08928617710606321, 0.06603312486235204, 0.08945328108588788, 0.10709780174924212, -0.010740002054041502, -0.024819971864564798, -0.21436656350458697, 0.3235315467967224, -0.0626620257755496, 0.21109472057228354, 0.16048454852283908, -0.08335586406630338, 0.005132107095591523, 0.03986749800104598, -0.055052529740449344, -0.12975891179799826, 0.07577175311225064, 0.27596348541555926, 0.07440718349597945, 0.1741783186853108, -0.3976561311959616, -0.18446342008521882, 0.08911985557878742, 0.23314180957921152, 0.1470064975390513, -0.07371047352805633, -0.34753633619638513, 0.1542456260912995, -0.20407538874880285, -0.16671712275333325, -0.16539962814862816, 0.00045795408722541824, -0.05061378285903924, -0.3064249155628401, 0.047616565661194946, 0.012557212278684223, 0.03596701247089014, -0.09239117986156065, -0.24469654569622581, -0.032061711688387534, -0.02070678653969505, 0.03879296893137507, 0.1027637261368737, 0.14293214991197897, -0.16802910572182186, -0.2331795271618191, 0.36600814692399186, -0.044490549023140445, -0.1580559224444064, 0.17976972033156435, -0.14194952282186196, -0.15818991820875405, 0.09866524079729602, 0.11499024251620663, 0.07062563244442178, -0.0925984907265268, 0.05192854572512285, -0.06637080966627125, 0.15739589207805693, 0.05894135046322402, 0.14338943663657316, 0.2662361117105025, 0.13644647536440627, -0.0568041944612019, 0.059574424020153144, -0.0030938505188788513, -0.13194815096495724, -0.36973700236931845, -0.14063577755862483, -0.11505151934437202, 0.05133421510008456, -0.02913803012386386, -0.1075341597032683, 0.3652115065466402, 0.08842494720089678, 0.19837149004672175, -0.03231120355446143, 0.2840598535226859, 0.04317191192593954, 0.06185219354449293, 0.09617867028479136, 0.3071398276684655, 0.1764985388113387, 0.0969740248818542, -0.2456632816048679, -0.003614100533210345, 0.012529860864192046]
|
707.1287
|
Monge-Ampere equations and moduli spaces of manifolds of circular type
|
A (bounded) manifold of circular type is a complex manifold M of dimension n
admitting a (bounded) exhaustive real function u, defined on M minus a point
x_o, so that: a) it is a smooth solution on $M\setminus {x_o}$ to the
Monge-Amp\`ere equation $(d d^c u)^n = 0$; b) x_o is a singular point for u of
logarithmic type and e^u extends smoothly on the blow up of M at x_o; c) $d d^c
(e^u) >0$ at any point of $M\setminus {x_o}$. This class of manifolds naturally
includes all smoothly bounded, strictly linearly convex domains and all
smoothly bounded, strongly pseudoconvex circular domains of $\bC^n$. The moduli
spaces of bounded manifolds of circular type are studied. In particular, for
each biholomorphic equivalence class of them it is proved the existence of an
essentially unique manifold in normal form. It is also shown that the class of
normalizing maps for an n-dimensional manifold M is a new holomorphic invariant
with the following property: it is parameterized by the points of a finite
dimensional real manifold of dimension n^2 when M is a (non-convex) circular
domain while it is of dimension $n^2 + 2 n$ when M is a strictly convex domain.
New characterizations of the circular domains and of the unit ball are also
obtained.
|
math.CV
|
a bounded manifold of circular type is a complex manifold m of dimension n admitting a bounded exhaustive real function u defined on m minus a point x_o so that a it is a smooth solution on msetminus x_o to the mongeampere equation d dc un 0 b x_o is a singular point for u of logarithmic type and eu extends smoothly on the blow up of m at x_o c d dc eu 0 at any point of msetminus x_o this class of manifolds naturally includes all smoothly bounded strictly linearly convex domains and all smoothly bounded strongly pseudoconvex circular domains of bcn the moduli spaces of bounded manifolds of circular type are studied in particular for each biholomorphic equivalence class of them it is proved the existence of an essentially unique manifold in normal form it is also shown that the class of normalizing maps for an ndimensional manifold m is a new holomorphic invariant with the following property it is parameterized by the points of a finite dimensional real manifold of dimension n2 when m is a nonconvex circular domain while it is of dimension n2 2 n when m is a strictly convex domain new characterizations of the circular domains and of the unit ball are also obtained
|
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|
[-0.18312641733956417, 0.09166295331464049, -0.016193937947358586, 0.0030835636387324347, -0.08923045157033177, -0.19763337708526413, 0.006290699290095187, 0.33098743770398936, -0.31375026724846017, -0.17173781692059184, 0.1178622043838193, -0.3123413732995824, -0.11674063735782116, 0.17370475186825782, -0.08012248392168538, 0.039925649413868634, 0.026242185545479, 0.09157485663144023, -0.11385650709952351, -0.27972821038455775, 0.4238290112456834, -0.12212949247046742, 0.1978568383843972, 0.03871632169027163, 0.12799704525804254, -0.03277654037701036, 0.04161234399224719, 0.06360386037223814, -0.13006254981244741, 0.10587736642985376, 0.24426778428858356, 0.10161820237792782, 0.25554950139924604, -0.30209604612736135, -0.18765709834955283, 0.17231000362640633, 0.12508641935902526, -0.03797747708202498, 0.015039447650537422, -0.2623200213870491, 0.13554995071652504, -0.04634738437181233, -0.2131405361106549, -0.038608812946685646, 0.11239884779920345, 0.0019281494268106366, -0.2945178797839754, 0.000250506985499875, 0.15287979354506429, 0.05485246448672183, -0.07993341968746258, -0.12782747334501934, -0.08436793611244352, 0.05366181673779688, -0.006434031286637105, 0.155381379993896, 0.08157065602166047, -0.03916548437347338, -0.054804127819875675, 0.34044568552437926, -0.08197832147520527, -0.279930580253625, 0.15857166339717982, -0.19990241845173515, -0.1142340923158698, 0.16612572297629602, 0.11346929568719373, 0.2246902117281625, -0.08019061177984904, 0.27660569141620006, -0.11231159473514571, 0.12204807698339518, 0.10215161845773318, -0.05044692399239449, 0.12116275349508901, 0.1356258830066577, 0.20863073235234897, 0.10456107422612819, -0.0103926083386298, -0.05664596018213383, -0.3541823321962202, -0.16973054440876575, -0.19598079826309397, 0.15318592401651912, -0.12631618655002555, -0.19518869816155923, 0.33049282067749686, -0.060201706247511845, 0.2330316044873435, 0.1122789698639744, 0.20071616553139152, 0.06586471014932888, 0.020894484600779285, 0.11022170307993326, 0.12947146942891744, 0.14420848269617395, 0.06529612680633534, -0.15760594091426475, -0.03383542442000208, 0.11529478358365935]
|
707.1288
|
Espaces de repr\'esentation multidimensionnels d\'edi\'es \`a la
visualisation
|
In decision-support systems, the visual component is important for On Line
Analysis Processing (OLAP). In this paper, we propose a new approach that faces
the visualization problem due to data sparsity. We use the results of a
Multiple Correspondence Analysis (MCA) to reduce the negative effect of
sparsity by organizing differently data cube cells. Our approach does not
reduce sparsity, however it tries to build relevant representation spaces where
facts are efficiently gathered. In order to evaluate our approach, we propose
an homogeneity criterion based on geometric neighborhood of cells. The obtained
experimental results have shown the efficiency of our method.
|
cs.DB
|
in decisionsupport systems the visual component is important for on line analysis processing olap in this paper we propose a new approach that faces the visualization problem due to data sparsity we use the results of a multiple correspondence analysis mca to reduce the negative effect of sparsity by organizing differently data cube cells our approach does not reduce sparsity however it tries to build relevant representation spaces where facts are efficiently gathered in order to evaluate our approach we propose an homogeneity criterion based on geometric neighborhood of cells the obtained experimental results have shown the efficiency of our method
|
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|
[-0.06246190022395942, -0.011531334624961156, -0.09834270772183, 0.056610883024548836, -0.1417075882592045, -0.09654247652886823, 0.05746537250683339, 0.3951989068917119, -0.27912303058448995, -0.3188971861053516, 0.09644332606147163, -0.265504157567157, -0.24225949261817012, 0.180272949161008, -0.1433104869568407, 0.059036799632750527, 0.09508878414030417, 0.025668440976797945, -0.027201261083217392, -0.2828017637585428, 0.3288528214365539, 0.03578756372720962, 0.3608616993273839, 0.04978388061604029, 0.0943622758961715, 0.0051104576456000896, -0.06371785677729709, 0.013353945327793607, -0.09905649842136818, 0.22733011409193093, 0.2936628013480418, 0.19699075324737494, 0.3130357988307824, -0.4346232894291677, -0.23323352909693035, 0.08699210932810265, 0.1605278516262032, 0.09950603285601528, -0.05431778365769193, -0.2751742673134155, 0.12851082687127854, -0.11517271947687363, -0.06260668942335956, -0.15999352602036854, -0.04389017013519412, -0.04111168396055219, -0.2804620519492517, 0.03299594018147281, 0.07961668424529604, 0.05198812860036545, -0.07619356939403138, -0.09696815291530278, 0.05083944024933078, 0.1458599450721378, 0.043328353902325034, 0.0037329909714436766, 0.10795354189830694, -0.07182376617777546, -0.12502968268893142, 0.39675208546295027, -0.009322404493762199, -0.23560115145427166, 0.19935382174853566, -0.09039506244261077, -0.17449233067304928, 0.09404445223805338, 0.23652225153723566, 0.09547168853701932, -0.143806744809493, 0.046549894397451295, -0.0630422559114966, 0.1978629224998231, 0.027688538595702094, -0.007635467376855045, 0.14892574974178974, 0.204967643180401, 0.07324544590492134, 0.1381692539780668, -0.09683057894045026, -0.05195766665435645, -0.24329932570275342, -0.13192570423891786, -0.20237038325112644, -0.03340585588343271, -0.10771026280662506, -0.1416230677764766, 0.3515666572026687, 0.24987676566337594, 0.2384808846002463, 0.04389848675818579, 0.35070792508154813, 0.06730967643786001, 0.11416373774409294, 0.02565231997206217, 0.14991127975321938, 0.0862085979344268, 0.14510169854885577, -0.2043284543162894, 0.06186478426172813, 0.07211849771181841]
|
707.1289
|
Conformal quaternionic contact curvature and the local sphere theorem
|
A tensor invariant is defined on a quaternionic contact manifold in terms of
the curvature and torsion of the Biquard connection involving derivatives up to
third order of the contact form. This tensor, called quaternionic contact
conformal curvature, is similar to the Weyl conformal curvature in Riemannian
geometry and to the Chern-Moser tensor in CR geometry. It is shown that a
quaternionic contact manifold is locally quaternionic contact conformal to the
standard flat quaternionic contact structure on the quaternionic Heisenberg
group, or equivalently, to the standard 3-sasakian structure on the sphere iff
the quaternionic contact conformal curvature vanishes.
|
math.DG math.AP
|
a tensor invariant is defined on a quaternionic contact manifold in terms of the curvature and torsion of the biquard connection involving derivatives up to third order of the contact form this tensor called quaternionic contact conformal curvature is similar to the weyl conformal curvature in riemannian geometry and to the chernmoser tensor in cr geometry it is shown that a quaternionic contact manifold is locally quaternionic contact conformal to the standard flat quaternionic contact structure on the quaternionic heisenberg group or equivalently to the standard 3sasakian structure on the sphere iff the quaternionic contact conformal curvature vanishes
|
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|
[-0.22949057872459405, 0.09156434210159872, -0.06915888843145601, 0.0779587933164071, -0.19484030725244356, -0.1989811809438908, -0.10430262180767497, 0.3535804670228034, -0.274497575962878, -0.14410829782006046, 0.0603104581978001, -0.2903345795158221, -0.2503145848690741, 0.09496924869611631, -0.06080459795027439, 0.02186773375284915, -0.018166798183561435, 0.1810526240721573, -0.21456755718396864, -0.2485074899396954, 0.49065645713815276, 0.023005539902999084, 0.2387184564841493, 0.10040110899776943, 0.13992246616470191, 0.011409424756159435, 0.021911995490176642, 0.03552380769646594, -0.11678397345004131, 0.13043494939528483, 0.2098518262655303, -0.06332117350943083, 0.11411119665598915, -0.38862085232169047, -0.21656243811000367, 0.12676469222832548, 0.051776113763109456, -0.05190117704701059, 0.05398019588177035, -0.3604511270793725, 0.05213111283599722, -0.0590144165753558, -0.1738428324841115, -0.08560306910895837, -0.014337844565767338, -0.13380967412257985, -0.1176335749332793, 0.08446767057377692, 0.10959936039313217, 0.05590242881456162, -0.061719514790694326, -0.03815188563941997, -0.08214936392115695, 0.08995951018153633, 0.015502976358164939, 0.09955183083989791, 0.16334628185485395, -0.054410229439429025, -0.06761686178874604, 0.37149515886772044, -0.12516883960853767, -0.3843611272013917, 0.07962782759865632, -0.17441446434383337, -0.13953041297630692, 0.10704497604307775, 0.13900419750383922, 0.13050134647257475, -0.09272240733428459, 0.23914083583655824, -0.02929678561203942, 0.05419252611392615, 0.12395141182505355, -0.10975099202454547, 0.13407911725190222, 0.05332045648627135, 0.14117091418034872, 0.09764154697293226, 0.0025970587122006988, -0.18130083305153008, -0.3832467789856755, -0.31283567207200186, -0.19834151509816625, 0.2599182835951143, -0.18436514182290661, -0.25181452953820926, 0.39562791400370473, -0.09567262569492284, 0.16886786943745838, 0.10389947697368203, 0.24521098740170805, -0.004861847450006373, 0.11733399021287201, 0.08328170843935591, 0.25760843907958086, 0.31432691564289283, 0.06820640909932174, -0.13373441474835332, -0.08447915292820152, 0.15531161333415278]
|
707.129
|
Smoothness Theorem for Differential BV Algebras
|
Associated to a differential BV algebra are two differential graded Lie
algebras: we call one classical and the other, which contains a formal h-bar
parameter, quantum. The classical dgLa is always smooth formal. In this paper,
we give necessary and sufficient conditions for the quantum dgLa to be smooth
formal. These conditions are equivalent to the degeneration of a version of the
noncommutative Hodge to de Rham spectral sequence. References added.
|
math.QA
|
associated to a differential bv algebra are two differential graded lie algebras we call one classical and the other which contains a formal hbar parameter quantum the classical dgla is always smooth formal in this paper we give necessary and sufficient conditions for the quantum dgla to be smooth formal these conditions are equivalent to the degeneration of a version of the noncommutative hodge to de rham spectral sequence references added
|
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|
[-0.17996991470351187, 0.03744743217658383, -0.13686879418632933, 0.11421133092486523, -0.19713740401678312, -0.15969239069726054, -0.08862637858313153, 0.3212302171585845, -0.3556203323245888, -0.20626358316004487, 0.12013492858673537, -0.18820087493620288, -0.13909187776521897, 0.1860031627026767, -0.24437440135581812, 0.008589850668139545, 0.029872475887163425, 0.11573804937250598, -0.09390043225926413, -0.25602544858579485, 0.43567798333898394, -0.03287596964526554, 0.18754525371814068, -0.01842503495429131, 0.11072906475304298, -0.038277988820533515, -0.016448135523807625, -0.020691908751679977, -0.20048024116451263, 0.13343864489136867, 0.3405247795277498, 0.05783723710550809, 0.22366355346437072, -0.3848449449828813, -0.06482069006084766, 0.15449672542564885, 0.10384958707661905, 0.07389369885548687, 0.00261151374311147, -0.26100319503268726, 0.12377775156162155, -0.16956700538580213, -0.13883372182420023, -0.08020673979493514, 0.02788133307976622, 0.008229922001499315, -0.24873210345460495, 0.042400363937649926, 0.09172838869911264, 0.11433977896059064, -0.06706200364950887, -0.06370605205015188, -0.09351383992897111, 0.05278760659783869, -0.10116281438107327, 0.0096643137119212, 0.1008766444045788, -0.056592579523977025, -0.12164315564269332, 0.35582808617659856, -0.05573319331546065, -0.24820924934629404, 0.12750275879048964, -0.1343700645989935, -0.2020476713225665, 0.11212721356833485, 0.016166916543381735, 0.140171668216796, -0.09994003924370652, 0.16632710805025056, -0.012108964255263269, 0.08509406751730073, 0.10259924798836591, 0.04466004486025219, 0.13863851110332867, 0.04955368338834862, 0.07862984150333303, 0.09197282460501785, 0.023813150061497753, -0.1507115032209057, -0.41589623185950264, -0.24090347894218186, -0.05256837249313757, 0.14523663929283198, -0.10106564788631504, -0.21880864058817986, 0.39050264299755366, 0.11538691141045797, 0.17681346400837664, 0.07974287032143174, 0.233194496679369, 0.17827745722065694, 0.054941916864522745, -0.015024846583657282, 0.1425316025450511, 0.24492852427852405, 0.08128832344910208, -0.13721705992824176, -0.0677996056259308, 0.17613566313332446]
|
707.1291
|
Implications of the Crystal Barrel data for meson-baryon symmetries
|
Making use of numerous resonances discovered by the Crystal Barrel
Collaboration we discuss some possible relations between the baryon and meson
spectra of resonances composed of the light non-strange quarks. Our goal is to
indicate new features that should be reproduced by the realistic dynamical
models describing the hadron spectrum in the sector of light quarks.
|
hep-ph
|
making use of numerous resonances discovered by the crystal barrel collaboration we discuss some possible relations between the baryon and meson spectra of resonances composed of the light nonstrange quarks our goal is to indicate new features that should be reproduced by the realistic dynamical models describing the hadron spectrum in the sector of light quarks
|
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|
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|
707.1292
|
Poisson transform for higher-rank graph algebras and its applications
|
Higher-rank graph generalisations of the Popescu-Poisson transform are
constructed, allowing us to develop a dilation theory for higher rank operator
tuples. These dilations are joint dilations of the families of operators
satisfying relations encoded by the graph structure which we call
$\Lambda$-contractions or $\Lambda$-coisometries. Besides commutant lifting
results and characterisations of pure states on higher rank graph algebras
several applications to the structure theory of non-selfadjoint graph operator
algebras are presented generalising recent results in special cases.
|
math.OA math.FA
|
higherrank graph generalisations of the popescupoisson transform are constructed allowing us to develop a dilation theory for higher rank operator tuples these dilations are joint dilations of the families of operators satisfying relations encoded by the graph structure which we call lambdacontractions or lambdacoisometries besides commutant lifting results and characterisations of pure states on higher rank graph algebras several applications to the structure theory of nonselfadjoint graph operator algebras are presented generalising recent results in special cases
|
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|
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|
707.1293
|
Circumbinary Molecular Rings Around Young Stars in Orion
|
We present high angular resolution 1.3 mm continuum, methyl cyanide molecular
line, and 7 mm continuum observations made with the Submillimeter Array and the
Very Large Array, toward the most highly obscured and southern part of the
massive star forming region OMC1S located behind the Orion Nebula. We find two
flattened and rotating molecular structures with sizes of a few hundred
astronomical units suggestive of circumbinary molecular rings produced by the
presence of two stars with very compact circumstellar disks with sizes and
separations of about 50 AU, associated with the young stellar objects 139-409
and 134-411. Furthermore, these two circumbinary rotating rings are related to
two compact and bright {\it hot molecular cores}. The dynamic mass of the
binary systems obtained from our data are $\geq$ 4 M$_\odot$ for 139-409 and
$\geq$ 0.5 M$_\odot$ for 134-411. This result supports the idea that
intermediate-mass stars will form through {\it circumstellar disks} and
jets/outflows, as the low mass stars do. Furthermore, when intermediate-mass
stars are in multiple systems they seem to form a circumbinary ring similar to
those seen in young, multiple low-mass systems (e.g., GG Tau and UY Aur).
|
astro-ph
|
we present high angular resolution 13 mm continuum methyl cyanide molecular line and 7 mm continuum observations made with the submillimeter array and the very large array toward the most highly obscured and southern part of the massive star forming region omc1s located behind the orion nebula we find two flattened and rotating molecular structures with sizes of a few hundred astronomical units suggestive of circumbinary molecular rings produced by the presence of two stars with very compact circumstellar disks with sizes and separations of about 50 au associated with the young stellar objects 139409 and 134411 furthermore these two circumbinary rotating rings are related to two compact and bright it hot molecular cores the dynamic mass of the binary systems obtained from our data are geq 4 m_odot for 139409 and geq 05 m_odot for 134411 this result supports the idea that intermediatemass stars will form through it circumstellar disks and jetsoutflows as the low mass stars do furthermore when intermediatemass stars are in multiple systems they seem to form a circumbinary ring similar to those seen in young multiple lowmass systems eg gg tau and uy aur
|
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|
[-0.1144733946748018, 0.1343528046745827, 0.011595309134273925, 0.05672232388521241, -0.07845403463330698, -0.09270604466521405, -0.006035838396920957, 0.44512874633073807, -0.15896420786717538, -0.3423032485307219, 0.09072552480794649, -0.2660790306222152, -0.02419723305019505, 0.16328369971192916, -0.0075430663734896075, -0.02384307478706447, 0.11980986417013464, -0.10926238445435615, -0.02437572419720597, -0.20050697870702572, 0.3230719345566981, 0.047334980207151746, 0.03530165558011037, -0.04154854184415012, 0.021233874027627237, -0.15204659567767365, -0.04541303875064228, -0.05490079957912153, -0.13118688411654109, 0.07888169978112779, 0.27467108426184794, 0.09345254513440046, 0.19513604133315185, -0.391867985386765, -0.16245119694251825, 0.027069828171721277, 0.21056238063236007, 0.0015392757150379413, -0.06057086317640615, -0.27732798016697346, 0.13462550554021116, -0.2017042255502214, -0.2075540955317889, 0.07816018934117601, 0.08535121004022458, 0.044978281204155424, -0.21531168294866335, 0.09384107962126201, 0.051249920354750164, 0.09171661792850909, -0.10168480948435471, -0.17249439694086977, -0.05092956196581497, 0.05216516401661674, -0.010512021905618077, 0.07969571959307009, 0.2017071940123731, -0.12381549599022669, -0.0104063814331623, 0.3976690920996156, -0.07593481665985151, -0.039563644234150805, 0.3337161290474276, -0.2597946509616798, -0.21154598922115117, 0.204532759851791, 0.117457703246491, 0.1855464261734888, -0.12786301207159992, -0.058785440256280005, -0.05236681738748828, 0.23172640042593654, 0.10781572986503735, 0.10153604632263435, 0.4087852664530915, 0.11393521692638689, -0.029304322148990734, 0.12410452317466392, -0.27092300815399445, -0.08424120788826024, -0.16495518143634924, -0.11724394677645143, -0.1233876711678975, 0.10190604327752051, -0.1559159212643318, -0.09113340693859652, 0.23943352204981574, 0.054128261659055314, 0.2249150794736523, 0.04228607328972196, 0.26980832936292026, 0.01084920920849962, 0.139868392313975, 0.1720476259009285, 0.2625878016479353, 0.20056213938661, 0.11591437964994002, -0.2040556460559209, 0.0028012586336702426, -0.04576913776862271]
|
707.1294
|
Factorization Approaches to B Meson Decays
|
We compare the theoretical frameworks and the phenomenological applications
of the factorization approaches to exclusive $B$ meson decays, which include
QCD-improved factorization, perturbative QCD, and soft-collinear effective
theory. Recent progress on two-body nonleptonic $B$ meson decays made in these
approaches are reviewed.
|
hep-ph
|
we compare the theoretical frameworks and the phenomenological applications of the factorization approaches to exclusive b meson decays which include qcdimproved factorization perturbative qcd and softcollinear effective theory recent progress on twobody nonleptonic b meson decays made in these approaches are reviewed
|
[['we', 'compare', 'the', 'theoretical', 'frameworks', 'and', 'the', 'phenomenological', 'applications', 'of', 'the', 'factorization', 'approaches', 'to', 'exclusive', 'b', 'meson', 'decays', 'which', 'include', 'qcdimproved', 'factorization', 'perturbative', 'qcd', 'and', 'softcollinear', 'effective', 'theory', 'recent', 'progress', 'on', 'twobody', 'nonleptonic', 'b', 'meson', 'decays', 'made', 'in', 'these', 'approaches', 'are', 'reviewed']]
|
[-0.023897584073156827, 0.1925782795685033, -0.14715679657335082, 0.1395509878084773, -0.07833654401336043, -0.1746492261466171, 0.0495384829479181, 0.3372968527532759, -0.1854272113137302, -0.08090902137614432, -0.04801764167634593, -0.37248611485674266, -0.04232178074085996, 0.03846596287829535, 0.09784130018115753, 0.241743574517646, 0.11907453030081731, -0.018287090640071602, -0.10256881060610924, -0.22232825038511128, 0.288201841558995, -0.0782719866505691, 0.19834627680081343, 0.23381453211463632, -0.09363085511029653, 0.07473392097745091, -0.15297505664195687, -0.017521097477237207, -0.1873579222176756, 0.13472633023879357, 0.25676427085307385, 0.12897302153786377, 0.1441711511662496, -0.4384107199896659, -0.12258913181722164, 0.019542131373392686, 0.2144447078906177, 0.11842905627729904, -0.010039214324760473, -0.3379046887248045, 0.10751978984280001, -0.2810343928147285, -0.03780928435957148, -0.2662957690301396, 0.052983105969837026, -0.10271723124952543, -0.3551993561864254, 0.02399429306041427, -0.10152308822476439, 0.02294913972062724, 0.03298822077479036, -0.3391233550916825, 0.1564776185966496, -0.007059282800626187, 0.2300224956125021, 0.1473197186077457, 0.20731503629524792, -0.20638372946441882, -0.2580021895867373, 0.4090899000210421, -0.013659856659138487, -0.16146996802472996, 0.21084125326680286, -0.1021238902051534, -0.24012560014879064, 0.05457648559517804, 0.23685019367951013, 0.09386415025662809, -0.17662992501365288, 0.2475509409365865, 0.014958686921523795, 0.05134512723556587, 0.03426879428194037, 0.1090599770901636, 0.16271243577024766, 0.1849815668094726, -0.16895548531430818, -0.020715006050609407, 0.023126686596134233, -0.15580290085857823, -0.4139566619747451, -0.011092667113102618, -0.04604496524137046, 0.07509574289655402, -0.06857686691537743, -0.11400627643091693, 0.33478149789429845, 0.09955328209547415, 0.23445059516511502, 0.021446396998639795, 0.421822371759585, 0.07705629823197212, 0.044450277786901485, 0.05253186935026731, 0.3566804012017591, 0.30614584781939075, 0.16007628182082304, -0.26827899233571123, -0.05855728964975458, 0.13136501647975474]
|
707.1295
|
Efficient supervised learning in networks with binary synapses
|
Recent experimental studies indicate that synaptic changes induced by
neuronal activity are discrete jumps between a small number of stable states.
Learning in systems with discrete synapses is known to be a computationally
hard problem. Here, we study a neurobiologically plausible on-line learning
algorithm that derives from Belief Propagation algorithms. We show that it
performs remarkably well in a model neuron with binary synapses, and a finite
number of `hidden' states per synapse, that has to learn a random
classification task. Such system is able to learn a number of associations
close to the theoretical limit, in time which is sublinear in system size. This
is to our knowledge the first on-line algorithm that is able to achieve
efficiently a finite number of patterns learned per binary synapse.
Furthermore, we show that performance is optimal for a finite number of hidden
states which becomes very small for sparse coding. The algorithm is similar to
the standard `perceptron' learning algorithm, with an additional rule for
synaptic transitions which occur only if a currently presented pattern is
`barely correct'. In this case, the synaptic changes are meta-plastic only
(change in hidden states and not in actual synaptic state), stabilizing the
synapse in its current state. Finally, we show that a system with two visible
states and K hidden states is much more robust to noise than a system with K
visible states. We suggest this rule is sufficiently simple to be easily
implemented by neurobiological systems or in hardware.
|
q-bio.NC cond-mat.stat-mech cs.NE q-bio.QM
|
recent experimental studies indicate that synaptic changes induced by neuronal activity are discrete jumps between a small number of stable states learning in systems with discrete synapses is known to be a computationally hard problem here we study a neurobiologically plausible online learning algorithm that derives from belief propagation algorithms we show that it performs remarkably well in a model neuron with binary synapses and a finite number of hidden states per synapse that has to learn a random classification task such system is able to learn a number of associations close to the theoretical limit in time which is sublinear in system size this is to our knowledge the first online algorithm that is able to achieve efficiently a finite number of patterns learned per binary synapse furthermore we show that performance is optimal for a finite number of hidden states which becomes very small for sparse coding the algorithm is similar to the standard perceptron learning algorithm with an additional rule for synaptic transitions which occur only if a currently presented pattern is barely correct in this case the synaptic changes are metaplastic only change in hidden states and not in actual synaptic state stabilizing the synapse in its current state finally we show that a system with two visible states and k hidden states is much more robust to noise than a system with k visible states we suggest this rule is sufficiently simple to be easily implemented by neurobiological systems or in hardware
|
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|
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|
707.1296
|
No light shining through a wall : new results from a photoregeneration
experiment
|
Recently, axion-like particle search has received renewed interest. In
particular, several groups have started ``light shining through a wall''
experiments based on magnetic field and laser both continuous, which is very
demanding in terms of detector background. We present here the 2$\sigma$ limits
obtained so far with our novel set-up consisting of a pulsed magnetic field and
a pulsed laser. In particular, we have found that the axion-like particle two
photons inverse coupling constant $M$ is $> 8\times 10^5$ GeV provided that the
particle mass $m_\mathrm{a} \sim$ 1 meV. Our results definitively invalidate
the axion interpretation of the original PVLAS optical measurements with a
confidence level greater than 99.9%.
|
hep-ex
|
recently axionlike particle search has received renewed interest in particular several groups have started light shining through a wall experiments based on magnetic field and laser both continuous which is very demanding in terms of detector background we present here the 2sigma limits obtained so far with our novel setup consisting of a pulsed magnetic field and a pulsed laser in particular we have found that the axionlike particle two photons inverse coupling constant m is 8times 105 gev provided that the particle mass m_mathrma sim 1 mev our results definitively invalidate the axion interpretation of the original pvlas optical measurements with a confidence level greater than 999
|
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|
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|
707.1297
|
Hubble Diagram of Gamma-Rays Bursts calibrated with Gurzadyan-Xue
Cosmology
|
Gamma-ray bursts (GRBs) being the most luminous among known cosmic objects
carry an essential potential for cosmological studies if properly used as
standard candles. In this paper we test with GRBs the cosmological predictions
of the Gurzadyan-Xue (GX) model of dark energy, a novel theory that predicts,
without any free parameters, the current vacuum fluctuation energy density
close to the value inferred from the SNIa observations. We also compare the GX
results with those predicted by the concordance scenario $\Lambda$-CDM.
According to the statistical approach by Schaefer (2007), the use of several
empirical relations obtained from GRBs observables, after a consistent
calibration for a specific model, enables one to probe current cosmological
models. Based on this recently introduced method, we use the 69 GRBs sample
collected by Schaefer (2007); and the most recently released SWIFT satellite
data (Sakamoto et al. 2007) together with the 41 GRBs sample collected by
Rizzuto et al. (2007), which has the more firmly determined redshifts. Both
data samples span a distance scale up to redshift about 7. We show that the GX
models are compatible with the Hubble diagram of the Schaefer (2007) 69 GRBs
sample. Such adjustment is almost identical to the one for the concordance
$\Lambda$-CDM.
|
astro-ph gr-qc
|
gammaray bursts grbs being the most luminous among known cosmic objects carry an essential potential for cosmological studies if properly used as standard candles in this paper we test with grbs the cosmological predictions of the gurzadyanxue gx model of dark energy a novel theory that predicts without any free parameters the current vacuum fluctuation energy density close to the value inferred from the snia observations we also compare the gx results with those predicted by the concordance scenario lambdacdm according to the statistical approach by schaefer 2007 the use of several empirical relations obtained from grbs observables after a consistent calibration for a specific model enables one to probe current cosmological models based on this recently introduced method we use the 69 grbs sample collected by schaefer 2007 and the most recently released swift satellite data sakamoto et al 2007 together with the 41 grbs sample collected by rizzuto et al 2007 which has the more firmly determined redshifts both data samples span a distance scale up to redshift about 7 we show that the gx models are compatible with the hubble diagram of the schaefer 2007 69 grbs sample such adjustment is almost identical to the one for the concordance lambdacdm
|
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|
[-0.018907099721911777, 0.07764514372979422, -0.08858381595121383, 0.1408211326331481, -0.11615125402476233, -0.0957737545987665, 0.06655846523250093, 0.37157831080995574, -0.16556279826563516, -0.3897074654163553, 0.030311463774748994, -0.3279042255735926, -0.036381425750949006, 0.26014419975570596, -0.04841564859650881, 0.053893632252036715, 0.08890707092013873, -0.07065657034082946, -0.046703297429816625, -0.32402793087623094, 0.2796684654422639, 0.1480102059984635, 0.25283993182169034, -0.09600340006965222, 0.10056441598041628, -0.043943914658583626, -0.09969357466861135, 0.010064199051292704, -0.21015460473880931, 0.05624271252095736, 0.20867831737085016, 0.14007925574948993, 0.2013474521791968, -0.3337056541090758, -0.2603718617632478, 0.1347161571783824, 0.07550755779185139, 0.06759896320648177, -0.023372817538822147, -0.3073718344497651, 0.05656259731703097, -0.21463504750027995, -0.12270238175342726, 0.004766299540296861, 0.026507306999600685, 0.014445853901399982, -0.21200433759177842, 0.13605333209175519, -0.025125676593143898, 0.011958586629526228, -0.08086111263768507, -0.07238946956960429, -0.018072001788175047, 0.053015662434437116, 0.06711371443096069, 0.08590505331380657, 0.07402030081432866, -0.09867994471609888, -0.11895297738230133, 0.3744928628335347, -0.07380408106261108, -0.027357413131936157, 0.1958623365879446, -0.13218671052617548, -0.1839679141533515, 0.08074135798499874, 0.09147740675754255, 0.05602091030415959, -0.20632111514909285, 0.09105025939291832, -0.03665854558659865, 0.20441330225024795, 0.03738973658338263, -0.028827609835506075, 0.23873137996190846, 0.1166727422635154, -0.014921119728812597, 0.05202200288520112, -0.15589976036520029, -0.0029013330972117216, -0.3035918601378245, -0.08416569990389473, -0.19285852742833223, 0.08790224575031881, -0.11876680329895871, -0.1123432263727346, 0.37342477750637115, 0.16747003901033203, 0.24281959376461565, 0.07799141686282923, 0.25543134042527527, 0.04499164159066219, 0.05170867842446902, 0.12736904714717576, 0.32063728335341163, 0.11449033651491719, 0.0961967907283492, -0.15320720110494312, 0.057211571666389, 0.036141727595719146]
|
707.1298
|
Cosmic kinematic dynamos in non-singular anisotropic universe
|
A marginally excited cosmic kinematic dynamo is found in the background of a
non-singular anisotropic Kasner cosmological metric solution of Einstein field
equation of general relativity. The magnetic field is not amplified but is
frozen inside the universe. Since a finite resistivity is assumed, a
nonsingular flow velocity is orthogonal to the magnetic field plane. The model
presents an inflationary phase. Magnetic field components are stretched along
the orthogonal planar directions while the flow is orthogonal to this magnetic
sheet. The self-induction magnetohydrodynamic field equation in Kasner universe
may be written in the form of a polynomial in the time coordinate which yields
a periodic flow.
|
astro-ph
|
a marginally excited cosmic kinematic dynamo is found in the background of a nonsingular anisotropic kasner cosmological metric solution of einstein field equation of general relativity the magnetic field is not amplified but is frozen inside the universe since a finite resistivity is assumed a nonsingular flow velocity is orthogonal to the magnetic field plane the model presents an inflationary phase magnetic field components are stretched along the orthogonal planar directions while the flow is orthogonal to this magnetic sheet the selfinduction magnetohydrodynamic field equation in kasner universe may be written in the form of a polynomial in the time coordinate which yields a periodic flow
|
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|
[-0.2689772149754407, 0.17576234610567312, -0.11755664180085626, 0.02477589797092391, -0.13003274225542005, -0.1031711761013798, -0.13412403117399663, 0.33869753960291593, -0.2600451114077894, -0.19320580157240466, 0.060527476310765126, -0.2099992537273551, -0.06724149410454731, 0.1767123897146996, 0.007851628674510515, -0.014499734432594676, -0.010492055116766045, 0.07503384820466756, -0.050835188662738735, -0.24013406368200932, 0.30259185999561594, 0.06129379489652391, 0.27639566026276574, -0.0441905295845332, 0.09834910697250995, -0.08733327793537306, 0.009982715896770076, 0.10492151591680804, -0.1302010015373663, -0.005750050862706354, 0.21287454701169342, 0.07250837424115436, 0.19314925147677367, -0.4294460992908703, -0.23615231180458135, 0.07840180218237329, 0.19871801013601417, 0.16614508187016122, -0.032444197196900004, -0.2622706634871099, 0.015943905738410803, -0.08531897772490135, -0.2044030505821179, -0.016258261419112248, 0.0034806994020605, -0.02500955607217104, -0.2812607179457357, 0.12165306303386558, 0.05692640514956471, 0.049299895855650866, -0.1246912296848231, -0.010423384437706532, -0.030358860453696183, 0.0035948347924101465, 0.12082472922750485, 0.15852504567339806, 0.15156336862787181, -0.13908777467440814, -0.03892933856256588, 0.4097720467889646, -0.10705759347293456, -0.2226608082122732, 0.06872016363250057, -0.22374225124927624, -0.07410559431157725, 0.19544322410036088, 0.13554770224464108, 0.11054392144927438, -0.16578322851520805, 0.17180654152630354, -0.025513899618021724, 0.12364988775818415, 0.10056495585232833, -0.06712805327052197, 0.313568540760931, 0.09979574893653956, 0.0845913514466753, 0.1070185131810711, -0.04993347696661246, -0.10892409760557678, -0.32549070185577533, -0.14976638049449562, -0.1639255632587076, 0.11558803970684442, -0.17657933853465607, -0.27474917909394037, 0.40389914455480946, 0.06489905336542814, 0.12806464481729804, -0.03362948974519792, 0.29511606406402896, 0.09828588311595596, 0.005760385813015812, 0.15567448267818623, 0.3155323290463783, 0.21263508510529855, 0.16775978062596208, -0.21708303549379673, -0.001903157241923629, 0.08627932632939433]
|
707.1299
|
Singular forces and point-like colloids in lattice Boltzmann
hydrodynamics
|
We present a second-order accurate method to include arbitrary distributions
of force densities in the lattice Boltzmann formulation of hydrodynamics. Our
method may be used to represent singular force densities arising either from
momentum-conserving internal forces or from external forces which do not
conserve momentum. We validate our method with several examples involving point
forces and find excellent agreement with analytical results. A minimal model
for dilute sedimenting particles is presented using the method which promises a
substantial gain in computational efficiency.
|
cond-mat.soft
|
we present a secondorder accurate method to include arbitrary distributions of force densities in the lattice boltzmann formulation of hydrodynamics our method may be used to represent singular force densities arising either from momentumconserving internal forces or from external forces which do not conserve momentum we validate our method with several examples involving point forces and find excellent agreement with analytical results a minimal model for dilute sedimenting particles is presented using the method which promises a substantial gain in computational efficiency
|
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|
[-0.061603435360622114, 0.09148383357493979, -0.14422926902998148, 0.04376439294897065, -0.05956555351262867, -0.13328154724114005, 0.013431526183877595, 0.3861396994453105, -0.23222390960947406, -0.33776809812790326, 0.007879384177191773, -0.271986181461593, -0.12891215091378133, 0.2189642774103005, -0.011363514028943894, 0.07479997958261066, 0.09677979041163515, -0.014003509553376495, -0.05754817800778078, -0.18976347208045785, 0.25793070398929824, 0.04483468847053989, 0.2655200377424679, 0.08886347092665368, 0.13584553862626597, -0.01955441019935079, -0.02866213315552691, 0.09302158901331628, -0.14301893059391438, 0.12973866659421018, 0.20039382467057737, -0.005522140994577146, 0.22706794456293786, -0.5005651029371997, -0.2625112112202659, 0.09794339026812827, 0.1267285034651073, 0.18801972819435434, -0.09869834475741698, -0.22097564050246302, 0.021314324265936525, -0.21671838036215887, -0.17955919294958797, -0.18230842189045576, -0.04624432831911779, 0.10704887470105527, -0.32071863306777143, 0.15543499652568887, 0.04001921996269829, 0.01857861364260316, -0.09733041993160618, -0.12471165896745444, -0.005764032447165469, 0.09411040878366315, 0.017548978966149705, 0.04027939963816607, 0.1537911833559231, -0.12338479875200768, -0.10161092494637138, 0.43260782672285397, -0.05816784629345553, -0.2945286853965826, 0.2567535847561752, -0.1067273705323204, -0.07211829758839818, 0.20242953234602037, 0.19523337908180022, 0.12391522618737526, -0.15168988094778685, 0.024498863207465946, -0.0040622310622072805, 0.1385614959904271, 0.01976138240907614, -0.03155927556624037, 0.19594997902423505, 0.12089096911524128, 0.022217238994837716, 0.13503386752776483, -0.07809949734407227, -0.1618526632693119, -0.3116317967452654, -0.10128639862860593, -0.18701983872437622, 0.038589092218721706, -0.08808417809064495, -0.14178292047822985, 0.3000636424176486, 0.21698917770934315, 0.16879384070861994, 0.06794831898665374, 0.3371810675485105, 0.09942524411386197, 0.073677267981466, 0.0803689918106013, 0.24744917255919996, 0.11958535075778277, 0.07647751379053949, -0.2374044093871262, -0.0019320309525582848, 0.08763411559346246]
|
707.13
|
Analytic results on the geometric entropy for free fields
|
The trace of integer powers of the local density matrix corresponding to the
vacuum state reduced to a region V can be formally expressed in terms of a
functional integral on a manifold with conical singularities. Recently, some
progress has been made in explicitly evaluating this type of integrals for free
fields. However, finding the associated geometric entropy remained in general a
difficult task involving an analytic continuation in the conical angle. In this
paper, we obtain this analytic continuation explicitly exploiting a relation
between the functional integral formulas and the Chung-Peschel expressions for
the density matrix in terms of correlators. The result is that the entropy is
given in terms of a functional integral in flat Euclidean space with a cut on V
where a specific boundary condition is imposed. As an example we get the exact
entanglement entropies for massive scalar and Dirac free fields in 1+1
dimensions in terms of the solutions of a non linear differential equation of
the Painleve V type.
|
hep-th
|
the trace of integer powers of the local density matrix corresponding to the vacuum state reduced to a region v can be formally expressed in terms of a functional integral on a manifold with conical singularities recently some progress has been made in explicitly evaluating this type of integrals for free fields however finding the associated geometric entropy remained in general a difficult task involving an analytic continuation in the conical angle in this paper we obtain this analytic continuation explicitly exploiting a relation between the functional integral formulas and the chungpeschel expressions for the density matrix in terms of correlators the result is that the entropy is given in terms of a functional integral in flat euclidean space with a cut on v where a specific boundary condition is imposed as an example we get the exact entanglement entropies for massive scalar and dirac free fields in 11 dimensions in terms of the solutions of a non linear differential equation of the painleve v type
|
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|
[-0.17113756051456386, 0.05759814947395529, -0.0893581296966383, 0.07411107739828753, -0.07141089623681073, -0.0842019972250317, 0.00925576104994186, 0.3139051792860934, -0.24503842310020418, -0.24656588890886103, 0.10858072686347772, -0.2646317699133898, -0.16290723650688024, 0.1644962768267953, -0.05513693229551074, 0.0690192350327517, 0.026551374863607414, 0.10801455444007209, -0.14830198731470967, -0.2175021174843564, 0.3737325956819184, -0.014102377658921549, 0.2227470372295515, 0.07038607935802164, 0.12267188512099286, 0.01382520616964691, -0.005055919616962924, 0.05573971401952969, -0.15272059165894683, 0.15508964567896769, 0.26903251210001833, 0.0751314064205596, 0.24096810864002416, -0.4164442066159664, -0.2013576813832377, 0.11378837773350603, 0.13849950364480415, 0.07266969477094597, -0.02581317117296611, -0.25592370814446247, 0.052269039184532386, -0.15671093396870703, -0.1893670628863302, -0.06797599969996196, 0.0550550763354157, -0.010897643754794968, -0.2753096116763173, 0.10558936460169427, 0.01927130776316379, 0.055780873386979554, -0.0788471315493525, -0.08127834094956404, -0.013981045779743882, 0.09070073154500939, 0.04258029835552655, 0.05141946408389644, 0.04595029054237812, -0.1708689432802864, -0.08201536030057027, 0.32930866167739486, -0.09223099549681964, -0.2850859997709366, 0.12827723670017088, -0.14957544232408207, -0.12136169004000046, 0.12030703717645144, 0.10427541113317465, 0.16289459342757862, -0.16686419752059561, 0.184328384194382, -0.03703151567359314, 0.09432722734795375, 0.092497239103823, 0.028160977057731625, 0.16246071966421424, 0.0612077630971643, 0.07122410879555073, 0.1688036548869797, -0.016803948032655613, -0.10528696902152715, -0.3766526589000767, -0.228324583118471, -0.19099940737765847, 0.09746852493986036, -0.11784601105698102, -0.20139664648608727, 0.3954549365126612, 0.04726169200651136, 0.20400870923291553, 0.042589156158889335, 0.24163861449694995, 0.21626992853795826, 0.050081297072271505, 0.05815979785561053, 0.19394128792019646, 0.15853154861904456, 0.08975917015111808, -0.2139392708738645, 0.013158427864651788, 0.14015509240738483]
|
707.1301
|
Static Screening and Delocalization Effects in the Hubbard-Anderson
Model
|
We study the suppression of electron localization due to the screening of
disorder in a Hubbard-Anderson model. We focus on the change of the electron
localization length at the Fermi level within a static picture, where
interactions are absorbed into the redefinition of the random on-site energies.
Two different approximations are presented, either one yielding a nonmonotonic
dependence of the localization length on the interaction strength, with a
pronounced maximum at an intermediate interaction strength. In spite of its
simplicity, our approach is in good agreement with recent numerical results.
|
cond-mat.dis-nn cond-mat.str-el
|
we study the suppression of electron localization due to the screening of disorder in a hubbardanderson model we focus on the change of the electron localization length at the fermi level within a static picture where interactions are absorbed into the redefinition of the random onsite energies two different approximations are presented either one yielding a nonmonotonic dependence of the localization length on the interaction strength with a pronounced maximum at an intermediate interaction strength in spite of its simplicity our approach is in good agreement with recent numerical results
|
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|
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|
707.1302
|
Superfluidity of fermions with repulsive on-site interaction in an
anisotropic optical lattice near a Feshbach resonance
|
We present a numerical study on ground state properties of a one-dimensional
(1D) general Hubbard model (GHM) with particle-assisted tunnelling rates and
repulsive on-site interaction (positive-U), which describes fermionic atoms in
an anisotropic optical lattice near a wide Feshbach resonance. For our
calculation, we utilize the time evolving block decimation (TEBD) algorithm,
which is an extension of the density matrix renormalization group and provides
a well-controlled method for 1D systems. We show that the positive-U GHM, when
hole-doped from half-filling, exhibits a phase with coexistence of
quasi-long-range superfluid and charge-density-wave orders. This feature is
different from the property of the conventional Hubbard model with positive-U,
indicating the particle-assisted tunnelling mechanism in GHM brings in
qualitatively new physics.
|
cond-mat.other cond-mat.str-el
|
we present a numerical study on ground state properties of a onedimensional 1d general hubbard model ghm with particleassisted tunnelling rates and repulsive onsite interaction positiveu which describes fermionic atoms in an anisotropic optical lattice near a wide feshbach resonance for our calculation we utilize the time evolving block decimation tebd algorithm which is an extension of the density matrix renormalization group and provides a wellcontrolled method for 1d systems we show that the positiveu ghm when holedoped from halffilling exhibits a phase with coexistence of quasilongrange superfluid and chargedensitywave orders this feature is different from the property of the conventional hubbard model with positiveu indicating the particleassisted tunnelling mechanism in ghm brings in qualitatively new physics
|
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|
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|
707.1303
|
Variations in 24 micron morphologies among galaxies in the Spitzer
Infrared Nearby Galaxies Survey: New insights into the Hubble sequence
|
To study the distribution of star formation and dust emission within nearby
galaxies, we measured five morphological parameters in the 3.6 and 24 micron
wave bands for 65 galaxies in the Spitzer Infrared Nearby Galaxies Survey
(SINGS) and 8 galaxies that were serendipitously observed by SINGS. The
morphological parameters demonstrate strong variations along the Hubble
sequence, including statistically significant differences between S0/a-Sab and
Sc-Sd galaxies. Early-type galaxies are generally found to be compact,
centralized, symmetric sources in the 24 micron band, while late-type galaxies
are generally found to be extended, asymmetric sources. These results suggest
that the processes that increase the real or apparent sizes of galaxies' bulges
also lead to more centralized 24 micron dust emission. Several phenomena, such
as strong nuclear star formation, Seyfert activity, or outer ring structures,
may cause galaxies to deviate from the general morphological trends observed at
24 microns. We also note that the 24 micron morphologies of Sdm-Im galaxies are
quite varied, with some objects appearing very compact and symmetric while
others appear diffuse and asymmetric. These variations reflect the wide
variation in star formation in irregular galaxies as observed at other
wavelengths. The variations in the 24 micron morphological parameters across
the Hubble sequence mirror many of the morphological trends seen in other
tracers of the ISM and in stellar emission. However, the 24 micron
morphological parameters for the galaxies in this sample do not match the
morphological parameters measured in the stellar wave bands. This implies that
the distribution of dust emission is related to but not equivalent to the
distribution of stellar emission.
|
astro-ph
|
to study the distribution of star formation and dust emission within nearby galaxies we measured five morphological parameters in the 36 and 24 micron wave bands for 65 galaxies in the spitzer infrared nearby galaxies survey sings and 8 galaxies that were serendipitously observed by sings the morphological parameters demonstrate strong variations along the hubble sequence including statistically significant differences between s0asab and scsd galaxies earlytype galaxies are generally found to be compact centralized symmetric sources in the 24 micron band while latetype galaxies are generally found to be extended asymmetric sources these results suggest that the processes that increase the real or apparent sizes of galaxies bulges also lead to more centralized 24 micron dust emission several phenomena such as strong nuclear star formation seyfert activity or outer ring structures may cause galaxies to deviate from the general morphological trends observed at 24 microns we also note that the 24 micron morphologies of sdmim galaxies are quite varied with some objects appearing very compact and symmetric while others appear diffuse and asymmetric these variations reflect the wide variation in star formation in irregular galaxies as observed at other wavelengths the variations in the 24 micron morphological parameters across the hubble sequence mirror many of the morphological trends seen in other tracers of the ism and in stellar emission however the 24 micron morphological parameters for the galaxies in this sample do not match the morphological parameters measured in the stellar wave bands this implies that the distribution of dust emission is related to but not equivalent to the distribution of stellar emission
|
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|
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|
707.1304
|
Un index de jointure pour les entrep\^ots de donn\'ees XML
|
XML data warehouses form an interesting basis for decision-support
applications that exploit heterogeneous data from multiple sources. However,
XML-native database systems currently bear limited performances and it is
necessary to research ways to optimize them. In this paper, we propose a new
index that is specifically adapted to the multidimensional architecture of XML
warehouses and eliminates join operations, while preserving the information
contained in the original warehouse. A theoretical study and experimental
results demonstrate the efficiency of our index, even when queries are complex.
|
cs.DB
|
xml data warehouses form an interesting basis for decisionsupport applications that exploit heterogeneous data from multiple sources however xmlnative database systems currently bear limited performances and it is necessary to research ways to optimize them in this paper we propose a new index that is specifically adapted to the multidimensional architecture of xml warehouses and eliminates join operations while preserving the information contained in the original warehouse a theoretical study and experimental results demonstrate the efficiency of our index even when queries are complex
|
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|
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|
707.1305
|
Correlation in single-photon experiments
|
Correlations of detection events in photodetectors placed at the opposite
sides of a beam splitter are studied in the frame of classical probability
theory. It is assumed that there is always one photon present during one
elementary measurement (one measurement act). Due to the conservation of
energy, thereis a strict anticorrelation in detections in one elementary
experiment, because the photon cannot excite both of the detectors at the same
time. It is explicitely shown in several examples that the bunching or
anti-bunching of the counts in serieses of elementary single-photon experiments
are governed by the statistical properties of grouping the sequences of the
elementary measurements.
|
quant-ph
|
correlations of detection events in photodetectors placed at the opposite sides of a beam splitter are studied in the frame of classical probability theory it is assumed that there is always one photon present during one elementary measurement one measurement act due to the conservation of energy thereis a strict anticorrelation in detections in one elementary experiment because the photon cannot excite both of the detectors at the same time it is explicitely shown in several examples that the bunching or antibunching of the counts in serieses of elementary singlephoton experiments are governed by the statistical properties of grouping the sequences of the elementary measurements
|
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|
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|
707.1306
|
S\'election simultan\'ee d'index et de vues mat\'erialis\'ees
|
Indices and materialized views are physical structures that accelerate data
access in data warehouses. However, these data structures generate some
maintenance overhead. They also share the same storage space. The existing
studies about index and materialized view selection consider these structures
separately. In this paper, we adopt the opposite stance and couple index and
materialized view selection to take into account the interactions between them
and achieve an efficient storage space sharing. We develop cost models that
evaluate the respective benefit of indexing and view materialization. These
cost models are then exploited by a greedy algorithm to select a relevant
configuration of indices and materialized views. Experimental results show that
our strategy performs better than the independent selection of indices and
materialized views.
|
cs.DB
|
indices and materialized views are physical structures that accelerate data access in data warehouses however these data structures generate some maintenance overhead they also share the same storage space the existing studies about index and materialized view selection consider these structures separately in this paper we adopt the opposite stance and couple index and materialized view selection to take into account the interactions between them and achieve an efficient storage space sharing we develop cost models that evaluate the respective benefit of indexing and view materialization these cost models are then exploited by a greedy algorithm to select a relevant configuration of indices and materialized views experimental results show that our strategy performs better than the independent selection of indices and materialized views
|
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|
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|
707.1307
|
Bistability of the lac operon during growth of Escherichia coli on
lactose and lactose + glucose
|
The lac operon of Escherichia coli exhibits bistability. Early studies showed
that bistability occurs during growth on TMG/succinate and lactose + glucose,
but not during growth on lactose. More recent studies with lacGFP-transfected
cells show bistability with TMG/succinate, but not with lactose and lactose +
glucose. In the literature, these results are attributed to variations of the
positive feedback generated by induction. Specifically, during growth on
TMG/succinate, induction generates positive feedback because the permease
stimulates the accumulation of TMG, which, in turn, promotes the synthesis of
more permease. This positive feedback is attenuated during growth on lactose
because hydrolysis of lactose by galactosidase suppresses the stimulatory
effect of the permease. But the stabilizing effect of dilution also changes
dramatically as a function of the medium composition. For instance, during
growth on TMG/succinate, the dilution rate of the permease is proportional to
its activity, $e$, because the specific growth rate is independent of $e$.
However, during growth on lactose, the permease dilution rate is proportional
to $e^2$ because the specific growth rate is proportional to the specific
lactose uptake rate, which in turn, proportional to $e$. Here, we show that:
(a) This dependence on $e^2$ creates such a strong stabilizing effect that
bistability is virtually impossible during growth on lactose, even in the face
of positive feedback. (b) This stabilizing effect is weakened during growth on
lactose + glucose because the specific growth rate on glucose is independent of
$e$, so that the dilution rate once again contains a term that is proportional
to $e$. We discuss the experimental data in the light of these results.
|
q-bio.MN q-bio.CB
|
the lac operon of escherichia coli exhibits bistability early studies showed that bistability occurs during growth on tmgsuccinate and lactose glucose but not during growth on lactose more recent studies with lacgfptransfected cells show bistability with tmgsuccinate but not with lactose and lactose glucose in the literature these results are attributed to variations of the positive feedback generated by induction specifically during growth on tmgsuccinate induction generates positive feedback because the permease stimulates the accumulation of tmg which in turn promotes the synthesis of more permease this positive feedback is attenuated during growth on lactose because hydrolysis of lactose by galactosidase suppresses the stimulatory effect of the permease but the stabilizing effect of dilution also changes dramatically as a function of the medium composition for instance during growth on tmgsuccinate the dilution rate of the permease is proportional to its activity e because the specific growth rate is independent of e however during growth on lactose the permease dilution rate is proportional to e2 because the specific growth rate is proportional to the specific lactose uptake rate which in turn proportional to e here we show that a this dependence on e2 creates such a strong stabilizing effect that bistability is virtually impossible during growth on lactose even in the face of positive feedback b this stabilizing effect is weakened during growth on lactose glucose because the specific growth rate on glucose is independent of e so that the dilution rate once again contains a term that is proportional to e we discuss the experimental data in the light of these results
|
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|
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|
707.1308
|
Discovery of Interstellar Propylene (CH_2CHCH_3): Missing Links in
Interstellar Gas-Phase Chemistry
|
We report the discovery of propylene (also called propene, CH_2CHCH_3) with
the IRAM 30-m radio telescope toward the dark cloud TMC-1. Propylene is the
most saturated hydrocarbon ever detected in space through radio astronomical
techniques. In spite of its weak dipole moment, 6 doublets (A and E species)
plus another line from the A species have been observed with main beam
temperatures above 20 mK. The derived total column density of propylene is 4
10^13 cm^-2, which corresponds to an abundance relative to H_2 of 4 10^-9,
i.e., comparable to that of other well known and abundant hydrocarbons in this
cloud, such as c-C_3H_2. Although this isomer of C_3H_6 could play an important
role in interstellar chemistry, it has been ignored by previous chemical models
of dark clouds as there seems to be no obvious formation pathway in gas phase.
The discovery of this species in a dark cloud indicates that a thorough
analysis of the completeness of gas phase chemistry has to be done.
|
astro-ph
|
we report the discovery of propylene also called propene ch_2chch_3 with the iram 30m radio telescope toward the dark cloud tmc1 propylene is the most saturated hydrocarbon ever detected in space through radio astronomical techniques in spite of its weak dipole moment 6 doublets a and e species plus another line from the a species have been observed with main beam temperatures above 20 mk the derived total column density of propylene is 4 1013 cm2 which corresponds to an abundance relative to h_2 of 4 109 ie comparable to that of other well known and abundant hydrocarbons in this cloud such as cc_3h_2 although this isomer of c_3h_6 could play an important role in interstellar chemistry it has been ignored by previous chemical models of dark clouds as there seems to be no obvious formation pathway in gas phase the discovery of this species in a dark cloud indicates that a thorough analysis of the completeness of gas phase chemistry has to be done
|
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|
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|
707.1309
|
Harmonic morphisms and hyperelliptic graphs
|
We study harmonic morphisms of graphs as a natural discrete analogue of
holomorphic maps between Riemann surfaces. We formulate a graph-theoretic
analogue of the classical Riemann-Hurwitz formula, study the functorial maps on
Jacobians and harmonic 1-forms induced by a harmonic morphism, and present a
discrete analogue of the canonical map from a Riemann surface to projective
space. We also discuss several equivalent formulations of the notion of a
hyperelliptic graph, all motivated by the classical theory of Riemann surfaces.
As an application of our results, we show that for a 2-edge-connected graph G
which is not a cycle, there is at most one involution $\iota$ on G for which
the quotient $G/\iota$ is a tree. We also show that the number of spanning
trees in a graph G is even if and only if G admits a non-constant harmonic
morphism to the graph B_2 consisting of 2 vertices connected by 2 edges.
Finally, we use the Riemann-Hurwitz formula and our results on hyperelliptic
graphs to classify all hyperelliptic graphs having no Weierstrass points.
|
math.CO math.AG
|
we study harmonic morphisms of graphs as a natural discrete analogue of holomorphic maps between riemann surfaces we formulate a graphtheoretic analogue of the classical riemannhurwitz formula study the functorial maps on jacobians and harmonic 1forms induced by a harmonic morphism and present a discrete analogue of the canonical map from a riemann surface to projective space we also discuss several equivalent formulations of the notion of a hyperelliptic graph all motivated by the classical theory of riemann surfaces as an application of our results we show that for a 2edgeconnected graph g which is not a cycle there is at most one involution iota on g for which the quotient giota is a tree we also show that the number of spanning trees in a graph g is even if and only if g admits a nonconstant harmonic morphism to the graph b_2 consisting of 2 vertices connected by 2 edges finally we use the riemannhurwitz formula and our results on hyperelliptic graphs to classify all hyperelliptic graphs having no weierstrass points
|
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|
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|
707.131
|
Spectropolarimetric inversions of the Ca II 8498 A and 8542 A lines in
the quiet Sun
|
We study non-LTE inversions of the Ca II infrared triplet lines as a tool for
inferring physical properties of the quiet Sun. The inversion code is
successful in recovering the temperature, velocity and longitudinal magnetic
flux density in the photosphere and chromosphere, but the height range where
the inversions are sensitive is limited, especially in the chromosphere. We
present results of inverting spectropolarimetric observations of the lines in a
quiet Sun region. We find three distinct ranges in chromospheric temperature:
low temperatures in the internetwork, high temperatures in the enhanced
magnetic network and intermediate temperatures associated with low magnetic
flux regions in the network. The differences between these regions become more
pronounced with height as the plasma-$\beta$ decreases. These inversions
support the picture of the chromosphere, especially close to the magnetic
network, being highly inhomogeneous both in the vertical and horizontal
directions.
|
astro-ph
|
we study nonlte inversions of the ca ii infrared triplet lines as a tool for inferring physical properties of the quiet sun the inversion code is successful in recovering the temperature velocity and longitudinal magnetic flux density in the photosphere and chromosphere but the height range where the inversions are sensitive is limited especially in the chromosphere we present results of inverting spectropolarimetric observations of the lines in a quiet sun region we find three distinct ranges in chromospheric temperature low temperatures in the internetwork high temperatures in the enhanced magnetic network and intermediate temperatures associated with low magnetic flux regions in the network the differences between these regions become more pronounced with height as the plasmabeta decreases these inversions support the picture of the chromosphere especially close to the magnetic network being highly inhomogeneous both in the vertical and horizontal directions
|
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|
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|
707.1311
|
Multiplicity Bounds for Quadratic Monomial Ideals
|
We prove the multiplicity bounds conjectured by Herzog-Huneke-Srinivasan and
Herzog-Srinivasan in the following cases: the strong conjecture for edge ideals
of bipartite graphs, and the weaker Taylor bound conjecture for all quadratic
monomial ideals. We attach a directed graph to a bipartite graph with perfect
matching, and describe operations on the directed graph that would reduce the
problem to a Cohen-Macaulay bipartite graph. We determine when equality holds
in the conjectured bound for edge ideals of bipartite graphs, and verify that
when equality holds, the resolution is pure. We characterize bipartite graphs
that have Cohen-Macaulay edge ideals and quasi-pure resolutions.
|
math.AC math.CO
|
we prove the multiplicity bounds conjectured by herzoghunekesrinivasan and herzogsrinivasan in the following cases the strong conjecture for edge ideals of bipartite graphs and the weaker taylor bound conjecture for all quadratic monomial ideals we attach a directed graph to a bipartite graph with perfect matching and describe operations on the directed graph that would reduce the problem to a cohenmacaulay bipartite graph we determine when equality holds in the conjectured bound for edge ideals of bipartite graphs and verify that when equality holds the resolution is pure we characterize bipartite graphs that have cohenmacaulay edge ideals and quasipure resolutions
|
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|
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|
707.1312
|
Etude Des Signaux Recueillis Par Un Radar Embarque Sur Un Vehicule En
Deplacement. Application a L'Interpretation Des Signaux Recoltes Par Le Radar
Wisdom De la Mission Spatiale Exomars
|
The ExoMars mission of the program Aurora (ESA) aims to send a vehicle
(Rover) on Mars in 2013. Beyond the technological aspects of the mission, the
Rover will also carry scientific instruments for the analysis of Mars
subsurface to search traces of past or present life in the Martian soil. The
Rover will embark a drilling machine which will give access to samples of
sub-surface of Mars to 2 meters depth. This constitutes the great originality
of ExoMars, because the Mars sub-surface remains still unknown and seems to be
the best place to shelter good conditions to create life. This drilling machine
will be guided by a radar system sounder UHF, the WISDOM instrument, which will
also make possible to probe the Mars sub-surface to a few meters of depth to
detect water and to study the geological structures. We have analytical and
numerical electromagnetic models to simulate the behavior of an electromagnetic
wave in the Mars sub-surface, but also to simulate the interactions between the
wave and the structure of the Rover. The objective of the work which we present
consists in the study of the factors able to create disturbances of
measurements in order to correct the effects on the measured signal. Initially
we present the solution which we retained in order to be able during the same
calculation to simulate the displacement of the Rover on several tens of
meters. We also present the results relating to the effect of the orientation
of the antenna during displacement due to topography of the observation site.
|
physics.geo-ph
|
the exomars mission of the program aurora esa aims to send a vehicle rover on mars in 2013 beyond the technological aspects of the mission the rover will also carry scientific instruments for the analysis of mars subsurface to search traces of past or present life in the martian soil the rover will embark a drilling machine which will give access to samples of subsurface of mars to 2 meters depth this constitutes the great originality of exomars because the mars subsurface remains still unknown and seems to be the best place to shelter good conditions to create life this drilling machine will be guided by a radar system sounder uhf the wisdom instrument which will also make possible to probe the mars subsurface to a few meters of depth to detect water and to study the geological structures we have analytical and numerical electromagnetic models to simulate the behavior of an electromagnetic wave in the mars subsurface but also to simulate the interactions between the wave and the structure of the rover the objective of the work which we present consists in the study of the factors able to create disturbances of measurements in order to correct the effects on the measured signal initially we present the solution which we retained in order to be able during the same calculation to simulate the displacement of the rover on several tens of meters we also present the results relating to the effect of the orientation of the antenna during displacement due to topography of the observation site
|
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|
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|
707.1313
|
A dichotomy characterizing analytic digraphs of uncountable Borel
chromatic number in any dimension
|
We study the extension of the Kechris-Solecki-Todorcevic dichotomy on
analytic graphs to dimensions higher than 2. We prove that the extension is
possible in any dimension, finite or infinite. The original proof works in the
case of the finite dimension. We first prove that the natural extension does
not work in the case of the infinite dimension, for the notion of continuous
homomorphism used in the original theorem. Then we solve the problem in the
case of the infinite dimension. Finally, we prove that the natural extension
works in the case of the infinite dimension, but for the notion of
Baire-measurable homomorphism.
|
math.LO math.CT math.GN
|
we study the extension of the kechrissoleckitodorcevic dichotomy on analytic graphs to dimensions higher than 2 we prove that the extension is possible in any dimension finite or infinite the original proof works in the case of the finite dimension we first prove that the natural extension does not work in the case of the infinite dimension for the notion of continuous homomorphism used in the original theorem then we solve the problem in the case of the infinite dimension finally we prove that the natural extension works in the case of the infinite dimension but for the notion of bairemeasurable homomorphism
|
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|
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|
707.1314
|
Fluorescence during Doppler cooling of a single trapped atom
|
We investigate the temporal dynamics of Doppler cooling of an initially hot
single trapped atom in the weak binding regime using a semiclassical approach.
We develop an analytical model for the simplest case of a single vibrational
mode for a harmonic trap, and show how this model allows us to estimate the
initial energy of the trapped particle by observing the fluorescence rate
during the cooling process. The experimental implementation of this temperature
measurement provides a way to measure atom heating rates by observing the
temperature rise in the absence of cooling. This method is technically
relatively simple compared to conventional sideband detection methods, and the
two methods are in reasonable agreement. We also discuss the effects of RF
micromotion, relevant for a trapped atomic ion, and the effect of coupling
between the vibrational modes on the cooling dynamics.
|
quant-ph physics.atom-ph
|
we investigate the temporal dynamics of doppler cooling of an initially hot single trapped atom in the weak binding regime using a semiclassical approach we develop an analytical model for the simplest case of a single vibrational mode for a harmonic trap and show how this model allows us to estimate the initial energy of the trapped particle by observing the fluorescence rate during the cooling process the experimental implementation of this temperature measurement provides a way to measure atom heating rates by observing the temperature rise in the absence of cooling this method is technically relatively simple compared to conventional sideband detection methods and the two methods are in reasonable agreement we also discuss the effects of rf micromotion relevant for a trapped atomic ion and the effect of coupling between the vibrational modes on the cooling dynamics
|
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|
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|
707.1315
|
Effectiveness and improvement of cylindrical cloaking with the SHS
lining
|
We analyze, both analytically and numerically, the effectiveness of cloaking
an infinite cylinder from observations by electromagnetic waves in three
dimensions. We show that, as truncated approximations of the ideal permittivity
and permeability tensors tend towards the singular ideal cloaking fields, so
that the anisotropy ratio tends to infinity, the $D$ and $B$ fields blow up
near the cloaking surface. We also consider cloaking with and without the SHS
(soft-and-hard surface) lining. We demonstrate numerically that cloaking is
significantly improved by the SHS lining, with both the far field of the
scattered wave significantly reduced and the blow up of $D$ and $B$ prevented.
|
physics.optics math-ph math.MP
|
we analyze both analytically and numerically the effectiveness of cloaking an infinite cylinder from observations by electromagnetic waves in three dimensions we show that as truncated approximations of the ideal permittivity and permeability tensors tend towards the singular ideal cloaking fields so that the anisotropy ratio tends to infinity the d and b fields blow up near the cloaking surface we also consider cloaking with and without the shs softandhard surface lining we demonstrate numerically that cloaking is significantly improved by the shs lining with both the far field of the scattered wave significantly reduced and the blow up of d and b prevented
|
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|
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|
707.1316
|
Fast Collisionless Reconnection Condition and Self-Organization of Solar
Coronal Heating
|
I propose that solar coronal heating is a self-regulating process that keeps
the coronal plasma roughly marginally collisionless. The self-regulating
mechanism is based on the interplay of two effects. First, plasma density
controls coronal energy release via the transition between the slow collisional
Sweet-Parker regime and the fast collisionless reconnection regime. This
transition takes place when the Sweet--Parker layer becomes thinner than the
characteristic collisionless reconnection scale. I present a simple criterion
for this transition in terms of the upstream plasma density (n_e), the
reconnecting (B_0) and guide (B_z) magnetic field components, and the global
length (L) of the reconnection layer: L < 6.10^9 cm [n_e/(10^{10}/cm^3)]^(-3)
(B_0/30G)^4 (B_0/B_z)^2. Next, coronal energy release by reconnection raises
the ambient plasma density via chromospheric evaporation and this, in turn,
temporarily inhibits subsequent reconnection involving the newly-reconnected
loops. Over time, however, radiative cooling gradually lowers the density again
below the critical value and fast reconnection again becomes possible. As a
result, the density is highly inhomogeneous and intermittent but,
statistically, does not deviate strongly from the critical value which is
comparable with the observed coronal density. Thus, in the long run, the
coronal heating process can be represented by repeating cycles that consist of
fast reconnection events (i.e., nanoflares), followed by rapid evaporation
episodes, followed by relatively long periods (1-hour) during which magnetic
stresses build up and simultaneously the plasma cools down and precipitates.
|
astro-ph physics.plasm-ph physics.space-ph
|
i propose that solar coronal heating is a selfregulating process that keeps the coronal plasma roughly marginally collisionless the selfregulating mechanism is based on the interplay of two effects first plasma density controls coronal energy release via the transition between the slow collisional sweetparker regime and the fast collisionless reconnection regime this transition takes place when the sweetparker layer becomes thinner than the characteristic collisionless reconnection scale i present a simple criterion for this transition in terms of the upstream plasma density n_e the reconnecting b_0 and guide b_z magnetic field components and the global length l of the reconnection layer l 6109 cm n_e1010cm33 b_030g4 b_0b_z2 next coronal energy release by reconnection raises the ambient plasma density via chromospheric evaporation and this in turn temporarily inhibits subsequent reconnection involving the newlyreconnected loops over time however radiative cooling gradually lowers the density again below the critical value and fast reconnection again becomes possible as a result the density is highly inhomogeneous and intermittent but statistically does not deviate strongly from the critical value which is comparable with the observed coronal density thus in the long run the coronal heating process can be represented by repeating cycles that consist of fast reconnection events ie nanoflares followed by rapid evaporation episodes followed by relatively long periods 1hour during which magnetic stresses build up and simultaneously the plasma cools down and precipitates
|
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|
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|
707.1317
|
Aspects of M-Theory Brane Interactions and String Theory Symmetries
|
The dissertation consists of two parts. The first presents an account of the
effective worldvolume description of $N$ coincident M2-branes ending on an
M5-brane in M-theory. It reviews Basu and Harvey's recent description of the
worldvolume theory of the M2-branes in terms of a Bogomol'nyi equation, and its
solution via a fuzzy (three-) funnel. Tests of the consistency of this picture
are then performed and many of the issues with it are addressed. This is
followed by a discussion of how a refinement of the fuzzy three-sphere algebra
used can lead to the correct $N^{3/2}$ scaling of degrees of freedom for this
system. A reduction of this Basu-Harvey picture to the D1-string picture of the
D1-D3 intersection is then performed via constructing a reduction of the
fuzzy-three sphere to the fuzzy two-sphere.
The second part of the dissertation describes how a holomorphic factorisation
argument can be used to demonstrate quantum equivalence of the doubled
formalism of string theory with the standard formalism by deriving the
partition function, including instanton and oscillator sectors.
|
hep-th
|
the dissertation consists of two parts the first presents an account of the effective worldvolume description of n coincident m2branes ending on an m5brane in mtheory it reviews basu and harveys recent description of the worldvolume theory of the m2branes in terms of a bogomolnyi equation and its solution via a fuzzy three funnel tests of the consistency of this picture are then performed and many of the issues with it are addressed this is followed by a discussion of how a refinement of the fuzzy threesphere algebra used can lead to the correct n32 scaling of degrees of freedom for this system a reduction of this basuharvey picture to the d1string picture of the d1d3 intersection is then performed via constructing a reduction of the fuzzythree sphere to the fuzzy twosphere the second part of the dissertation describes how a holomorphic factorisation argument can be used to demonstrate quantum equivalence of the doubled formalism of string theory with the standard formalism by deriving the partition function including instanton and oscillator sectors
|
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|
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|
707.1318
|
Surfaces from Circles
|
In the search for appropriate discretizations of surface theory it is crucial
to preserve such fundamental properties of surfaces as their invariance with
respect to transformation groups. We discuss discretizations based on M\"obius
invariant building blocks such as circles and spheres. Concrete problems
considered in these lectures include the Willmore energy as well as conformal
and curvature line parametrizations of surfaces. In particular we discuss
geometric properties of a recently found discrete Willmore energy. The
convergence to the smooth Willmore functional is shown for special refinements
of triangulations originating from a curvature line parametrization of a
surface. Further we treat special classes of discrete surfaces such as
isothermic and minimal. The construction of these surfaces is based on the
theory of circle patterns, in particular on their variational description.
|
math.DG
|
in the search for appropriate discretizations of surface theory it is crucial to preserve such fundamental properties of surfaces as their invariance with respect to transformation groups we discuss discretizations based on mobius invariant building blocks such as circles and spheres concrete problems considered in these lectures include the willmore energy as well as conformal and curvature line parametrizations of surfaces in particular we discuss geometric properties of a recently found discrete willmore energy the convergence to the smooth willmore functional is shown for special refinements of triangulations originating from a curvature line parametrization of a surface further we treat special classes of discrete surfaces such as isothermic and minimal the construction of these surfaces is based on the theory of circle patterns in particular on their variational description
|
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|
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|
707.1319
|
Quantum Monte Carlo simulations of bosonic and fermionic impurities in a
two-dimensional hard-core boson system
|
A two-dimensional lattice hard-core boson system with a small fraction of
bosonic or fermionic impurity particles is studied. The impurities have the
same hopping and interactions as the dominant bosons and their effects are
solely due to quantum statistics. Quantum Monte Carlo simulations are carried
out in which paths of the dominant boson species are sampled and a summation is
performed over all second-species paths compatible with the permutation cycles.
Both kinds of impurities reduce modestly and equally the Kosterliz-Thouless
superfluid transition temperature. However, the effective impurity interactions
are found to be qualitatively different at lower temperatures; fermions are
repulsive and further suppress superfluidity at low temperatures.
|
cond-mat.other
|
a twodimensional lattice hardcore boson system with a small fraction of bosonic or fermionic impurity particles is studied the impurities have the same hopping and interactions as the dominant bosons and their effects are solely due to quantum statistics quantum monte carlo simulations are carried out in which paths of the dominant boson species are sampled and a summation is performed over all secondspecies paths compatible with the permutation cycles both kinds of impurities reduce modestly and equally the kosterlizthouless superfluid transition temperature however the effective impurity interactions are found to be qualitatively different at lower temperatures fermions are repulsive and further suppress superfluidity at low temperatures
|
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|
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|
707.132
|
Cartan and Berwald connections in the pullback formalism
|
Adopting the pullback approach to global Finsler geometry, the aim of the
present paper is to provide new intrinsic (coordinate-free) proofs of intrinsic
versions of the existence and uniqueness theorems for the Cartan and Berwald
connections on a Finsler manifold. To accomplish this, the notions of semispray
and nonlinear connection associated with a given regular connection, in the
pullback bundle, is introduced and investigated. Moreover, it is shown that for
the Cartan and Berwald connections, the associated semispray coincides with the
canonical spray and the associated nonlinear connection coincides with the
Barthel connection. An explicit intrinsic expression relating both connections
is deduced.
|
math.DG
|
adopting the pullback approach to global finsler geometry the aim of the present paper is to provide new intrinsic coordinatefree proofs of intrinsic versions of the existence and uniqueness theorems for the cartan and berwald connections on a finsler manifold to accomplish this the notions of semispray and nonlinear connection associated with a given regular connection in the pullback bundle is introduced and investigated moreover it is shown that for the cartan and berwald connections the associated semispray coincides with the canonical spray and the associated nonlinear connection coincides with the barthel connection an explicit intrinsic expression relating both connections is deduced
|
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|
[-0.1721582642314709, 0.011467940800774195, -0.08185758628864206, 0.12281615969921261, -0.18746402709945745, -0.16301665085313075, -0.02915829581872779, 0.34633513114542935, -0.30390910267391624, -0.20963146702692315, 0.09325483390563807, -0.2494143920941461, -0.2537756259827053, 0.15132692536594822, -0.14440612628252483, -0.004432092037271051, 0.022502425126731396, 0.08508420948255305, -0.17392226789539278, -0.16914715154174095, 0.4639778596659501, 0.07270812414878723, 0.26888039257085206, 0.05998353000854966, 0.21278370483595804, -0.040010447321715305, -0.08191018328801089, 0.04824583742804095, -0.18101273698302262, 0.16512588701923103, 0.20981636341186424, 0.09044908704327456, 0.19925441943547306, -0.3903313386162706, -0.13897366633675262, 0.14966157032176852, 0.06283918278024751, -0.026021287666962427, -0.018985241748547804, -0.3036458390929243, 0.07894976872379558, -0.10487013402413212, -0.19775709182345858, -0.09121162389569423, 0.03877090834373353, 0.023212109034990564, -0.1697097874803505, 0.031247671764325715, 0.12471743218381615, 0.06103581372721523, -0.11031182917455833, -0.02002361466122024, -0.061527302684992846, 0.06768566449446713, 0.048904855174067265, 0.06419032803900979, 0.04582720972122807, -0.07181821704851281, -0.125729954372361, 0.33035965621763586, -0.04612579736310769, -0.2857082679173818, 0.15700289998751352, -0.06828205897381492, -0.13040435951495288, 0.0865917926124644, 0.08700234843783226, 0.08803436202544938, -0.12120009534170523, 0.14661510518920956, -0.046570607429078106, 0.05995250306110464, 0.09711990090927072, 0.021360534457855074, 0.11231780464888788, 0.11382111177469294, 0.10517417817084375, 0.14186438117358907, -0.0075651416555047035, -0.13952788851205625, -0.36842627217080076, -0.239989369493617, -0.10574150047100642, 0.14787924243365505, -0.1375302539892408, -0.15313273298128408, 0.4150392952393375, 0.04530259494797564, 0.18272295124445329, 0.14038623943833597, 0.21521713969288578, 0.08860765906123846, -0.00042884445329215013, 0.06743998837419878, 0.2512557787053725, 0.3486910089302589, 0.08482351196203929, -0.17491471845948814, 0.02860734369331861, 0.16136886746914803]
|
707.1321
|
An X-ray jet in the BL Lac S5 2007+777
|
The BL Lac S5 2007+777 was observed by us with Chandra, to find the X-ray
counterpart to its 18" radio jet, and study its structure. Indeed, a bright
X-ray jet was discovered in the 33 ks ACIS-S image of the source. We present
its properties and briefly discuss the implications.
|
astro-ph
|
the bl lac s5 2007777 was observed by us with chandra to find the xray counterpart to its 18 radio jet and study its structure indeed a bright xray jet was discovered in the 33 ks aciss image of the source we present its properties and briefly discuss the implications
|
[['the', 'bl', 'lac', 's5', '2007777', 'was', 'observed', 'by', 'us', 'with', 'chandra', 'to', 'find', 'the', 'xray', 'counterpart', 'to', 'its', '18', 'radio', 'jet', 'and', 'study', 'its', 'structure', 'indeed', 'a', 'bright', 'xray', 'jet', 'was', 'discovered', 'in', 'the', '33', 'ks', 'aciss', 'image', 'of', 'the', 'source', 'we', 'present', 'its', 'properties', 'and', 'briefly', 'discuss', 'the', 'implications']]
|
[-0.04399347383528948, 0.02257114926353097, -0.10089641874656081, 0.15298010686412453, -0.1829179282579571, -0.0710131223127246, 0.055440378128550946, 0.49084544271230696, -0.17788502745330334, -0.3524665228649974, 0.13119462090777234, -0.29388661740347743, -0.0501264214143157, 0.18958106115460396, -0.03254309603013098, -0.025892328902846203, 0.03358993355184794, -0.059851655783131716, -0.050129027143120765, -0.21595801381859928, 0.20961441148072482, 0.12679892854765057, 0.2145082960044965, -0.004825558718293905, 0.12546305770054458, -0.002459587506018579, -0.11025441045640036, -0.030734153166413307, -0.06990324040874839, 0.07582855964079499, 0.1731588124111295, 0.10641846362501382, 0.16002034611534327, -0.3162979107350111, -0.17925544736906887, -0.008136468762531877, 0.10172415907494724, -0.04610215913504362, -0.005269973706454038, -0.3159378423169255, 0.10102868592366576, -0.21796111948788166, -0.21925737877376378, 0.050962333641946314, 0.09057178027927876, -0.00895101237576455, -0.09403413656749762, 0.08138116285204887, -0.0022019281797111033, 0.013904655519872904, -0.1888635862013325, -0.01786013077944517, -0.053417785950005056, 0.024142769621685146, 0.10407130489125847, 0.0884611987741664, 0.13048558895476162, -0.1774707117024809, -0.20302112065255642, 0.37423687174916265, -0.0043516957014799115, 0.04599689813330769, 0.22656644554808736, -0.25011183199472725, -0.27310469856485725, 0.13248125386424361, 0.06620445149950684, 0.11423402274027467, -0.15771952139330098, 0.06954085229663179, -0.0694000225700438, 0.2422277266997844, 0.0319986685551703, 0.11544628836214542, 0.26300575375556945, 0.15276450973469763, -0.06244487241841853, 0.27959600895643233, -0.3705085105728358, 0.07779692030511796, -0.27071177706122396, -0.09140961678698659, -0.0805725116096437, 0.13124435365200043, -0.045560357376816685, -0.08232331827282906, 0.43225172663107514, 0.053215017449110745, 0.21447274189442397, 0.002579471985809505, 0.23601077866740525, 0.08640942219644784, 0.048443981874734164, 0.13555757485330105, 0.38303350798785685, 0.16981756411492824, 0.17420311108231545, -0.23772626250982284, -0.004158535683527589, 0.0020377391017973425]
|
707.1322
|
Theory of dimension for large discrete sets and applications
|
We define two notions of discrete dimension based on the Minkowski and
Hausdorff dimensions in the continuous setting. After proving some basic
results illustrating these definitions, we apply this machinery to the study of
connections between the Erdos and Falconer distance problems in geometric
combinatorics and geometric measure theory, respectively.
|
math.CO math.CA
|
we define two notions of discrete dimension based on the minkowski and hausdorff dimensions in the continuous setting after proving some basic results illustrating these definitions we apply this machinery to the study of connections between the erdos and falconer distance problems in geometric combinatorics and geometric measure theory respectively
|
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|
[-0.06645558981690555, 0.08084145833738149, -0.12093571132980287, 0.1376541610318236, -0.04708861488383263, -0.11215537400916219, 0.06425890085054561, 0.33364837046712637, -0.3354391461610794, -0.2504061095137149, 0.10177052037790418, -0.27586924942210317, -0.228843042710796, 0.18923852808773517, -0.2042829342931509, 0.04652548126876354, -0.025864073261618614, 0.01976145327091217, -0.13648008367978037, -0.2807633889466524, 0.3901817841734737, -0.0551496733725071, 0.23733171302825212, 0.1150105654959043, 0.09987384675070643, 0.0372232610359788, -0.11244619345292449, 0.05624462604522705, -0.25839943028986456, 0.21296976044774055, 0.22714559510350227, 0.15380749495234342, 0.28230609255842865, -0.39586131535470487, -0.17737827392295002, 0.11774979403242469, 0.05267990235239267, 0.049902814013767054, 0.027485611147712915, -0.31353074878454207, 0.08686235842294991, -0.06630908507853746, -0.14760453010792843, -0.08435653612017631, 0.04022509438917041, 0.01444572168868035, -0.1637296504364349, 0.04462603632360697, 0.1173011957295239, 0.13146123476326466, -0.07910279979929329, -0.0940840471163392, 0.03578646063338965, 0.12155636289855465, 0.05038981962949038, -0.020797978979535402, 0.06496610093861818, -0.029654997889883815, -0.21873780488967895, 0.30456097960472106, 0.020396163407713174, -0.23643364369869233, 0.23715591287706048, -0.14496875983662905, -0.202238442376256, -0.0220398254878819, 0.16523110980167985, 0.11434702201746404, -0.08367366502992808, 0.15175976676517167, -0.0726163343153894, 0.08798557110130786, 0.17021325543522836, 0.0744963476061821, 0.08409419797360897, 0.09442320674657821, 0.09572615018114447, 0.1801071984122973, -0.00472138938261196, -0.16515553168952465, -0.33278537917882206, -0.16410052590072155, -0.17303380023688078, 0.06720453951507807, -0.18043704715470085, -0.15449016761034728, 0.36243342515081167, 0.15607592426240444, 0.18096919221803545, 0.14141877985559403, 0.2431268603121862, 0.05070950819179416, -0.057593007979448885, 0.06684521614108235, 0.17143859530158806, 0.26686383470892905, 0.034039251254871485, -0.12051875399425625, -0.04213966624811292, 0.22790270749479533]
|
707.1323
|
Predictions for sin 2(beta/phi_1)_eff in b->s penguin dominated modes
|
We provide a review of predictions for sin 2beta_eff in b->s penguin
dominated modes based on 1/m_b expansion and/or SU(3) flavor symmetry. The
experimental results are consistently lower than the theoretical predictions.
In order to interpret whether this effect is a sign of new physics
contributions or can be explained away within the Standard Model a theoretical
input cannot be avoided. The effect survives at a level larger than 2.1 sigma
in a conservative average over different modes that includes theoretical
predictions.
|
hep-ph
|
we provide a review of predictions for sin 2beta_eff in bs penguin dominated modes based on 1m_b expansion andor su3 flavor symmetry the experimental results are consistently lower than the theoretical predictions in order to interpret whether this effect is a sign of new physics contributions or can be explained away within the standard model a theoretical input cannot be avoided the effect survives at a level larger than 21 sigma in a conservative average over different modes that includes theoretical predictions
|
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|
[-0.08914908477127916, 0.18917849770656264, -0.0951423923734848, 0.11622298288545231, -0.10206140025814132, -0.12440360648125955, 0.09365087848656424, 0.3310732656249368, -0.198056368702432, -0.2924367084236043, 0.0660614217475352, -0.2936932298513811, -0.06735148895020801, 0.1778196972204236, -0.0052353330836744935, -0.0367456986781823, 0.05997598863195446, 0.034196557020328415, -0.10688871869862807, -0.1814293830269357, 0.2270184608471648, 0.03646466622367592, 0.24987966137393036, 0.08499177480570791, -0.023882546473476218, -0.08192161611485772, -0.040583605117096404, 0.044242224065450635, -0.11131226982562532, 0.06322387260066845, 0.20024639917480783, 0.05725795486033326, 0.20454883502750862, -0.4454202011636481, -0.21939499521480374, 0.07333833959362493, 0.17060210407575274, 0.16249609246804583, -0.008937367284954412, -0.26864218341595514, 0.11309376644629349, -0.19503433787740948, -0.12648758166128907, -0.05435475549751484, -0.01535394995064452, -0.10702065760042609, -0.3362471122215161, 0.1294438145236998, 0.02531814867653316, 0.06057857841298711, -0.012984328165014342, -0.20286601956752015, -0.027422468978684486, 0.07476747106681238, 0.05381763576126725, 0.047800560976256526, 0.11249429633324148, -0.14252094509613858, -0.16136920415773626, 0.4373247351997146, -0.12819556963506507, -0.20478383292693916, 0.14285471967546406, -0.1893170262777769, -0.14130064716176471, 0.13216936045394437, 0.1957319660748287, 0.0586878771559341, -0.1146407099213542, 0.060479021404029394, -0.00562524482062677, 0.1937482567481333, 0.022589920267530875, 0.04383184970356524, 0.24007137928430627, 0.1876587957447599, -0.009842856298768667, 0.06722829768877113, -0.04498283216934197, -0.11813559252541603, -0.360631802528188, -0.042379258069913925, -0.1172836623949612, 0.049760658603634336, -0.06988963476245905, -0.08241134161875291, 0.4103146310123365, 0.17117650696735193, 0.23401271710853752, 0.05077302258279992, 0.30800143702001104, 0.1415217728126885, 0.09056712311079226, 0.036987398546643374, 0.30223254979678243, 0.09669981893470012, 0.01847265322164564, -0.21545634502488212, 0.07248613487065929, 0.036034389421707246]
|
707.1324
|
Exploring improved holographic theories for QCD: Part I
|
Various holographic approaches to QCD in five dimensions are explored using
input both from the putative non-critical string theory as well as QCD. It is
argued that a gravity theory in five dimensions coupled to a dilaton and an
axion may capture the important qualitative features of pure QCD. A part of the
higher alpha' corrections are resummed into a dilaton potential. The potential
is shown to be in one-to-one correspondence with the exact beta-function of
QCD, and its knowledge determines the full structure of the vacuum solution.
The geometry near the UV boundary is that of AdS_5 with logarithmic corrections
reflecting the asymptotic freedom of QCD. We find that all relevant confining
backgrounds have an IR singularity of the "good" kind that allows unambiguous
spectrum computations. Near the singularity the 't Hooft coupling is driven to
infinity. Asymptotically linear glueball masses can also be achieved. The
classification of all confining asymptotics, the associated glueball spectra
and meson dynamics are addressed in a companion paper, ArXiv:0707.1349
|
hep-th hep-lat hep-ph
|
various holographic approaches to qcd in five dimensions are explored using input both from the putative noncritical string theory as well as qcd it is argued that a gravity theory in five dimensions coupled to a dilaton and an axion may capture the important qualitative features of pure qcd a part of the higher alpha corrections are resummed into a dilaton potential the potential is shown to be in onetoone correspondence with the exact betafunction of qcd and its knowledge determines the full structure of the vacuum solution the geometry near the uv boundary is that of ads_5 with logarithmic corrections reflecting the asymptotic freedom of qcd we find that all relevant confining backgrounds have an ir singularity of the good kind that allows unambiguous spectrum computations near the singularity the t hooft coupling is driven to infinity asymptotically linear glueball masses can also be achieved the classification of all confining asymptotics the associated glueball spectra and meson dynamics are addressed in a companion paper arxiv07071349
|
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|
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|
707.1325
|
The Norm Index Theorem (An Analytic Proof)
|
We give an analytic proof of the norm index theorem $[I_:K^* N(I_L)] =[L:K]$
for cyclic extensions of number fields using spectral theory of the idele class
group.
|
math.NT math.SP
|
we give an analytic proof of the norm index theorem i_k ni_l lk for cyclic extensions of number fields using spectral theory of the idele class group
|
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|
[-0.20396818820602045, 0.08477585976372491, -0.1323099761872212, 0.09003765096601385, -0.0947290500625968, -0.11780374060170008, -0.020650839276361063, 0.3031207492145208, -0.302364253367369, -0.2417859037478383, 0.06508677883539349, -0.19178481851346219, -0.1265095861342091, 0.2537558376072691, -0.1339615538286475, -0.06185492436186625, -0.048957525824125, 0.15117358401990855, -0.029459002499396984, -0.22463052024921545, 0.35171269985417336, -0.045328979165508196, 0.17455905905136695, 0.059417398933034674, 0.044111065566539764, 0.10376878641545773, -0.056515538348601416, -0.02358491074007291, -0.20463496734961295, 0.14911899314476892, 0.28086491454786694, 0.1336327172242678, 0.2522501384552855, -0.3520987808990937, -0.1618334821676119, 0.25429761635426146, 0.08103172805231924, 0.0018778587333284891, -0.07054939894722058, -0.22165717625354703, 0.13995977204579574, -0.23954409418197778, -0.21664280601992056, -0.07750634301023987, 0.05211103779639906, 0.034120390514055125, -0.30725902476562905, 0.05214926816272335, 0.14135762793459714, 0.21417866772613847, -0.05310046443572411, -0.13414425825556883, 0.03566424194006966, 0.03154919321577136, 0.037544375930268034, -0.00598715920932591, 0.07553064531216827, -0.054331729761683024, -0.16411910936809504, 0.28616228262678933, -0.09877143105348715, -0.14442215129159963, 0.06830790728473893, -0.07280695445549029, -0.19174576908923113, 0.09309211086768371, 0.07447124766902281, 0.18932032255599132, 0.013043314576722108, 0.2451069991175945, -0.13224447590227312, 0.14786855776149493, 0.07933467601497586, 0.0725531717762351, 0.06781758181750774, 0.014095087052108003, 0.10336413055371779, 0.14085311132769746, 0.017568066716194153, -0.02361609048854846, -0.4009085704500859, -0.1967646229492787, -0.1662556703130786, 0.10544177603263122, -0.19857911332152212, -0.2419119573986301, 0.4515486970687142, 0.024937127734749362, 0.06138693806357109, 0.1938705005360624, 0.16299135653445354, 0.12398585404914159, 0.04290090990252793, 0.05278019291850237, 0.07428041415718886, 0.36429462338296265, -0.08318858203263237, -0.1451854811479839, -0.12155572885575776, 0.2941847830437697]
|
707.1326
|
New Generalizations of Poisson Algebras
|
We introduce many new generalizations of Poisson algebras which can be
constructed inside the associative algebra of linear transformations over a
vector space.
|
math.RA math.SG
|
we introduce many new generalizations of poisson algebras which can be constructed inside the associative algebra of linear transformations over a vector space
|
[['we', 'introduce', 'many', 'new', 'generalizations', 'of', 'poisson', 'algebras', 'which', 'can', 'be', 'constructed', 'inside', 'the', 'associative', 'algebra', 'of', 'linear', 'transformations', 'over', 'a', 'vector', 'space']]
|
[-0.11959157904367083, 0.13673697638770807, -0.052986690572098545, 0.04997112326647924, -0.19939287905783756, -0.13464276037057457, -0.07731839115528957, 0.3541283273016629, -0.4783552839704182, -0.17147710797903332, 0.13428412837421763, -0.1585867668542525, -0.21797225980655008, 0.22400534238018419, -0.13995750066216872, -0.04916409872796224, 0.016268317304227665, 0.12218546972650549, -0.21552165719154087, -0.31018394323916215, 0.4059643515021257, 0.011300191394579799, 0.21849943300628144, -0.11486332244037287, 0.21125936494006411, 0.08489407746769163, -0.03682491863551347, 0.0485653254676752, -0.10063826912285193, 0.133538779883605, 0.3103295044730539, 0.11088660318890343, 0.22301185487405115, -0.3637968233746031, -0.1811463700040527, 0.21193688362836838, 0.19396664028096458, 0.05591383242331769, -0.02335583912613599, -0.28276311545430316, 0.07805009943473598, -0.26415219198426476, -0.07233163768061153, -0.16394256905693075, 0.008173617331877998, 0.0331144221936879, -0.2683555078692734, -0.032970438772083624, 0.07596304672567741, 0.09636492609127384, -0.14649264150015687, -0.06456625392741483, -0.05123443674782048, 0.008931140516601179, -0.14513765307872192, 0.0066393011087632695, 0.15134846190314577, -0.017431840138590855, -0.23789740280936594, 0.3363513105913349, -0.04380154966012291, -0.3376670920330545, 0.1060252413963494, -0.13243005394621793, -0.20295790075729397, 0.07043935097349079, 0.1751813757152337, 0.07309714571127425, -0.10665315017104149, 0.19923401239287594, -0.1402937301799007, -0.007197246522359226, 0.11234666488092879, 0.03900100726067372, 0.2052534821078829, 0.09829661679332671, 0.03214275597787017, 0.17546746065414956, 0.04405260053665742, -0.112702919251245, -0.3807481384795645, -0.2116404994107459, -0.06540829672113709, 0.11803552249203557, -0.14114797868482445, -0.20808353157633025, 0.4083854470037572, 0.09329362875660477, 0.22038159916258376, 0.05822542915626874, 0.15171425651920878, 0.12508536769968012, 0.21622376475969088, 0.06416205571883399, 0.059066099904315626, 0.2501217353603114, 0.03061451193491888, -0.034938984957989305, -0.08231620524969438, 0.18995141766398496]
|
707.1327
|
Comment on "Multiferroicity Induced by Dislocated Spin-Density Waves"
|
I show that the claims in Phys. Rev. Lett. 98, 257602 by Betouras et al
concerning YMn2O5 are incorect.
|
cond-mat.mtrl-sci
|
i show that the claims in phys rev lett 98 257602 by betouras et al concerning ymn2o5 are incorect
|
[['i', 'show', 'that', 'the', 'claims', 'in', 'phys', 'rev', 'lett', '98', '257602', 'by', 'betouras', 'et', 'al', 'concerning', 'ymn2o5', 'are', 'incorect']]
|
[0.00043561827624216676, 0.06712043040897697, 0.12026303820312023, -0.36644927808083594, -0.07381396600976586, 0.038800005218945444, 0.1612184604164213, 0.3206781003973447, 0.09358944470295683, -0.4483628203161061, -0.18955204146186588, -0.334772378904745, -0.35227068280801177, 0.2389877326786518, -0.3811954641714692, -0.021052224386949092, -0.024072680331300944, -0.24109909689286724, 0.015900959973805584, -0.45676428283331916, 0.018147813621908426, 0.18359759089071304, 0.35060561809223145, 0.12352362630190328, -0.04375860569416545, 0.0897276921023149, -0.07002616871614009, -0.01717040059156716, -0.34671627196303234, -0.10426475282292813, 0.15086566237732768, 0.12360353861004114, 0.27435169788077474, -0.386411115527153, -0.2976906863041222, 0.055298159713856876, -0.10359831553068943, 0.16841575922444463, 0.07741757488111034, -0.5125630424590781, 0.11693199952424038, -0.28325892332941294, -0.11735680501442403, -0.22261095652356744, 0.36189256428042427, 0.07751230569556355, -0.3395369441132061, 0.3589979070238769, 0.13380031485576183, 0.03154352237470448, 0.11825859968666919, -0.07262615609215572, -0.053535965154878795, -0.32469214766751975, -0.11542065010871738, 0.10301004475331865, -0.03392925195294083, 0.11332419417158235, -0.23389353067614138, 0.2386584838386625, 0.019024702021852136, -0.058316267386544496, 0.3104536139580887, -0.09142543587950058, -0.1741484317171853, 0.01157641177996993, 0.06984153331723064, 0.18856378085911274, -0.16928476974135265, 0.2519478425383568, -0.2562330818618648, 0.07997851411346346, 0.2398114225070458, -0.03645326862329057, 0.1114801416406408, -0.05050148896407336, -0.24478449492016807, -0.02992872125469148, -0.07542971907241736, -0.1253381470341992, -0.32886457099812105, -0.22612089506583288, -0.2600227910443209, 0.11810552282258868, 0.26335442397976294, 0.032003358239308, 0.31368967494927347, 0.28354517405387014, 0.3845716940704733, -0.11697672464651987, 0.03744902717880905, 0.01981952117057517, -0.20801579719409347, 0.4216963241342455, 0.36853689863346517, 0.2010460033925483, 0.062453085149172693, -0.20790886459872127, -0.002080850419588387, 0.048381084634456784]
|
707.1328
|
Evidence for short-lived SN Ia progenitors
|
We use the VESPA algorithm and spectra from the Sloan Digital Sky Survey to
investigate the star formation history of the host galaxies of 257 Type Ia
supernovae. We find 5$\sigma$ evidence for a short-lived population of
progenitors with lifetimes of less than 180 Myr, indicating a Type Ia supernova
channel arising from stars in the mass range $\sim$3.5-8 $M_\odot$. As
standardizeable candles, Type Ia supernovae play an important role in
determining the expansion history of the Universe, but to be useful for future
cosmological surveys, the peak luminosity needs to be free of uncorrected
systematic effects at the level of 1-2%. If the different progenitor routes
lead to supernovae with even moderately small differences in properties, then
these need to be corrected for separately, or they could lead to a systematic
bias in future supernovae surveys, as the prompt route is likely to increase in
importance at high redshift. VESPA analysis of hosts could be a valuable tool
in this, by identifying which progenitor route is most likely.
|
astro-ph
|
we use the vespa algorithm and spectra from the sloan digital sky survey to investigate the star formation history of the host galaxies of 257 type ia supernovae we find 5sigma evidence for a shortlived population of progenitors with lifetimes of less than 180 myr indicating a type ia supernova channel arising from stars in the mass range sim358 m_odot as standardizeable candles type ia supernovae play an important role in determining the expansion history of the universe but to be useful for future cosmological surveys the peak luminosity needs to be free of uncorrected systematic effects at the level of 12 if the different progenitor routes lead to supernovae with even moderately small differences in properties then these need to be corrected for separately or they could lead to a systematic bias in future supernovae surveys as the prompt route is likely to increase in importance at high redshift vespa analysis of hosts could be a valuable tool in this by identifying which progenitor route is most likely
|
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|
[-0.034573334417516546, 0.10093245919493452, -0.061687337032275365, 0.14731743447745907, -0.14635046016857295, -0.08713440751169055, 0.08200506029173821, 0.3974643745016129, -0.20735920503682878, -0.3407889052648984, 0.08522384336988796, -0.3080468894220844, -0.013122274314463582, 0.2506070662985578, -0.030447428344944325, -0.08263666090663589, 0.10968846219144066, -0.0872997062147728, -0.05685256434723366, -0.2997776699540693, 0.2900331310118504, 0.11201893517170988, 0.20588782722950869, -0.034173287016095684, 0.01019966472813394, -0.10879378065389271, -0.08650443363391484, -0.040285505553973575, -0.16398079564394374, 0.004658379346697724, 0.2913485225356756, 0.17734326619566196, 0.2538771594286334, -0.3565249350209515, -0.22821982209556846, 0.16761559856379227, 0.2450033089802933, 0.13547956513537515, -0.09209793149230314, -0.25653579106437974, 0.11454072623677175, -0.22245839437528048, -0.1712296422421267, 0.06173333420710627, 0.022266301926546953, 0.034460934183915104, -0.21938556677057586, 0.17376306304123273, -0.021870894041924095, 0.06001015667737063, -0.06857677921375614, -0.1026179644506469, -0.03350836501063202, 0.09342791911608185, 0.0235555327533456, 0.06816295338770335, 0.10404259362258017, -0.15850770434813707, -0.016391746943727845, 0.4525412445045298, -0.04298872998030371, -0.001249736561606239, 0.17600366785267224, -0.16895141801103905, -0.1563438854451912, 0.10475435480094304, 0.18686816658702723, 0.07945295952681806, -0.2087737445558776, -0.06062232222376181, 0.09870998330491905, 0.17838886950907873, 0.01276789779408968, 0.1221006271155039, 0.35413247504870277, 0.16066643232590563, 0.031289122790829946, 0.03388372441570807, -0.18792910040688834, 0.009688558716637393, -0.26875543141726493, -0.10784667012852706, -0.10423361015273258, 0.15304076085175483, -0.14375593372434586, -0.1215345913910174, 0.3367041529134093, 0.13240481082106098, 0.18568717661158493, -0.0026194625942956747, 0.24752194702575384, 0.04475912257857133, 0.1293757171314653, 0.05008332240339812, 0.31507008790781366, 0.1344771569725015, 0.09246588385334083, -0.2101304930162899, 0.12469206537796362, -0.0009323055412442912]
|
707.1329
|
Fock space, quantum fields and kappa-Poincar\'e symmetries
|
We study the quantization of a linear scalar field, whose symmetries are
described by the kappa-Poincare' Hopf-algebra, via deformed Fock space
construction. The one-particle sector of the theory exhibits a natural
(planckian) cut-off for the field modes. At the multi-particle level the
non-trivial co-algebra structure of kappa-Poincare' leads to a deformed
bosonization in the construction of Fock space states. These physical states
carry energy-momentum charges which are divergenceless and obey a deformed
dispersion relation.
|
hep-th
|
we study the quantization of a linear scalar field whose symmetries are described by the kappapoincare hopfalgebra via deformed fock space construction the oneparticle sector of the theory exhibits a natural planckian cutoff for the field modes at the multiparticle level the nontrivial coalgebra structure of kappapoincare leads to a deformed bosonization in the construction of fock space states these physical states carry energymomentum charges which are divergenceless and obey a deformed dispersion relation
|
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|
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|
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