搜索结果: 16-30 共查到“物理学 Expansion”相关记录64条 . 查询时间(0.02 秒)
Perturbative expansion of N <8 Supergravity
Perturbative expansion Supergravity
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2010/12/24
We characterise the one-loop amplitudes for N=6 and N=4 supergravity in four dimensions. For N=6 we find that the one-loop n-point amplitudes can be expanded in terms of scalar box and triangle funct...
On the high-density expansion for Euclidean Random Matrices
the high-density expansion Euclidean Random Matrices
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2010/12/27
Diagrammatic techniques to compute perturbatively the spectral properties of Euclidean Random Matrices in the high-density regime are introduced and discussed in detail. Such techniques are developed ...
The 1/N expansion of colored tensor models
The 1/N expansion colored tensor models
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2010/12/27
In this paper we perform the 1/N expansion of the colored three dimensional Boulatov tensor model. As in matrix models, we obtain a systematic topological expansion, with more and more complicated to...
The influence of inhomogeneities on the large-scale expansion of the universe
the large-scale expansion universe
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2010/12/27
The evolution of an inhomogeneous universe composed entirely of matter is followed from an early, nearly uniform state until the time when the inhomogeneities have begun to grow large. The particular...
Hydrodynamic Expansion of a Strongly Interacting Fermi-Fermi Mixture
Hydrodynamic Expansion Strongly Interacting Fermi-Fermi Mixture
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2010/11/25
We report on the expansion of a Fermi-Fermi mixture of 6Li and 40K atoms under conditions of
strong interactions realized near the center of an interspecies Feshbach resonance. We observe two differe...
Can noncommutative effects of quantum nature account for the present speed up of the cosmic expansion?
noncommutative quantum nature account
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2010/12/20
In this paper we investigate to which extent noncommutativity, a intrinsically quantum property,may influence the Friedmann-Robertson-Walker cosmological dynamics at late times/large scales.
Time-convolutionless master equation for quantum dots: Perturbative expansion to arbitrary order
Time-convolutionless master equation quantum dots Perturbative expansion arbitrary order
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2010/11/19
The master equation describing the non-equilibrium dynamics of a quantum dot coupled to metallic leads is considered. Employing a superoperator approach, we derive an exact time-convolutionless master...
Absence of sign problem in the (saddle point approximation of the) nilpotency expansion of QCD at finite chemical potential
nilpotency expansion finite chemical potential
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2011/1/13
We have developed a method to derive the (approximate) quark contribution to the fermion free
energy of QCD on a lattice, at finite temperature and chemical potential, with Kogut-Susskind
fermions i...
Effective Polyakov-loop theory for pure Yang-Mills from strong coupling expansion
Effective Polyakov-loop theory pure Yang-Mills strong coupling expansion
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2011/1/13
Lattice Yang-Mills theories at finite temperature can be mapped onto effective 3d spin systems,
thus facilitating their numerical investigation.
Rare-gas clusters in intense VUV, XUV and soft x-ray pulses: Signatures of the transition from nanoplasma-driven cluster expansion to Coulomb explosion in ion and electron spectra
VUV XUV soft x-ray pulses
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2010/11/16
We investigate the wavelength dependent ionization, heating, and expansion dynamics of medium-sized rare-gas clusters (Ar$_{923}$) under intense femtosecond short-wavelength free electron laser pulse...
On the high-density expansion for Euclidean Random Matrices
high-density expansion Euclidean Random Matrices
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2010/11/22
Diagrammatic techniques to compute perturbatively the spectral properties of Euclidean random
matrices (ERM) in the high-density regime are introduced and discussed in detail. Such techniques are dev...
Using Model-based Overlapping Seed Expansion to detect highly overlapping community structure
Model-based Overlapping Seed Expansion community structure
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2010/11/16
As research into community finding in social networks progresses, there is a need for algorithms capable of detecting overlapping community structure. Many algorithms have been proposed in recent yea...
The 1/N expansion of colored tensor models
1/N expansion colored tensor models
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2010/12/20
In this paper we perform the 1=N expansion of the colored three dimensional Boulatov tensor model.As in matrix models, we obtain a systematic topological expansion, with increasingly complicated topol...
Probing the course of cosmic expansion with a combination of observational data
cosmic expansion combination of observational data
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2010/12/20
We study the cosmic expansion history by reconstructing the deceleration parameter q(z)
from the SDSS-II type Ia supernova sample (SNIa) with two different light curve fits (MLCS2k2
and SALT-II), th...
Effective Polyakov-loop theory for pure Yang-Mills from strong coupling expansion
Effective Polyakov-loop theory Yang-Mills
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2011/1/6
Lattice Yang-Mills theories at finite temperature can be mapped onto effective 3d spin systems, thus facilitating their numerical investigation. Using strong-coupling expansions we derive effective ac...