搜索结果: 31-45 共查到“理学 Expansion”相关记录152条 . 查询时间(0.103 秒)
Multiplicative white noise functionals and the Krylov-Veretennikov expansion for coalescing stochastic flows
Krylov-Veretennikov expansion coalescing stochastic flows Probability
font style='font-size:12px;'>
2011/9/20
Abstract: In this article we consider multiplicative operator-valued white noise functionals related to a stochastic flow. A generalization of the Krylov-Veretennikov expansion is presented. An analog...
Current response, structure factor and hydrodynamic quantities of a two- and three-dimensional Fermi gas from the operator product expansion
Current response structure factor
font style='font-size:12px;'>
2011/7/21
We apply the operator product expansion to determine the asymptotic form of the current response of a Fermi gas in two and three dimensions.
Testing the density matrix expansion against ab initio calculations of trapped neutron drops
density matrix neutron drops
font style='font-size:12px;'>
2011/7/20
Microscopic input to a universal nuclear energy density functional can be provided through the density matrix expansion (DME), which has recently been revived and improved.
Peculiar motions, accelerated expansion and the cosmological axis
Peculiar motions accelerated expansion cosmological
font style='font-size:12px;'>
2011/10/12
Peculiar velocities change the expansion rate of any observer moving relative to the smooth Hubble flow. As a result, observers in a galaxy like our Milky Way can experience accelerated expansion with...
Expansion of $k$-Schur functions for maximal $k$-rectangles within the affine nilCoxeter algebra
$k$-Schur functions $k$-rectangles affine nilCoxeter algebra Combinatorics
font style='font-size:12px;'>
2011/9/14
Abstract: We give several explicit combinatorial formulas for the expansion of $k$-Schur functions indexed by maximal $k$-rectangles, $s_R^{(k)}$, in terms of the standard basis of the affine nilCoxet...
A semiclassical heat trace expansion for the perturbed harmonic oscillator
semiclassical heat trace expansion the perturbed harmonic oscillator Spectral Theory
font style='font-size:12px;'>
2011/9/9
Abstract: In this paper we study a semiclassical heat trace expansion for perturbations of the harmonic oscillator, by adapting to the semiclassical setting techniques developed by Hitrik and Polterov...
An effective theory of accelerated expansion
dark energy theory in ation
font style='font-size:12px;'>
2011/10/8
We work out an effective theory of accelerated expansion to describe general phenomena of inflation and acceleration (dark energy) in the Universe. Our aim is to determine from theoretical grounds, in...
Estimates on the modulus of expansion for vector fields solving nonlinear equations
Estimates vector fields nonlinear equations Differential Geometry
font style='font-size:12px;'>
2011/9/5
Abstract: By adapting methods of \cite{AC} we prove a sharp estimate on the expansion modulus of the gradient of the log of the parabolic kernel to the Sch\"ordinger operator with convex potential, wh...
Manifestly gauge invariant theory of the nonlinear cosmological perturbations in the leading order of the gradient expansion
nonlinear cosmological perturbation, gauge invariance, non-Gaussianity PACS number(s):98.80.Cq
font style='font-size:12px;'>
2011/9/29
In the full nonlinear cosmological perturbation theory in the leading order of the gradient expansion, all the types of the gauge invariant perturbation variables are defined. The metric junction cond...
Asymptotic expansion of beta matrix models in the one-cut regime
Asymptotic expansion beta matrix models the one-cut regime Probability
font style='font-size:12px;'>
2011/8/26
Abstract: We prove the existence of a 1/N expansion to all orders in beta matrix models with a confining, off-critical potential corresponding to an equilibrium measure with a connected support. Thus,...
Light propagation and the average expansion rate in near-FRW universes
Light propagation average expansion rate universes
font style='font-size:12px;'>
2011/9/29
We consider universes which are close to Friedmann-Robertson-Walker in the sense that metric perturbations, their time derivatives and first spatial derivatives are small, but second spatial derivativ...
Effective field theory for hydrodynamics: thermodynamics, and the derivative expansion
Effective field theory hydrodynamics:thermodynamics derivative expansion
font style='font-size:12px;'>
2011/10/14
We consider the low-energy effective field theory describing the infrared dynamics of non-dissipative fluids. We extend previous work to accommodate conserved charges, and we clarify the matching betw...
Self-similar analytical model of the plasma expansion in a magnetic field
Plasma expansion Self-similar model Magnetic field Plasma Physics
font style='font-size:12px;'>
2011/8/2
Abstract: The study of hot plasma expansion in a magnetic field is of interest for many astrophysical applications. In order to observe this process in laboratory, an experiment is proposed in which a...
Levy area logistic expansion and simulation
Levy area simulation logistic expansion
font style='font-size:12px;'>
2011/8/22
Abstract: We present a new representation for the Levy chordal area for a two-dimensional Wiener process conditioned on its endpoints. This is based on an infinite weighted sum of Logistic random vari...
The expansion in ultraspherical polynomials: a simple procedure for the fast computation of the ultraspherical coefficients
Ultraspherical expansions Gegenbauer coefficients Abel transform
font style='font-size:12px;'>
2011/7/28
Abstract: We present a simple and fast algorithm for the computation of the coefficients of the expansion of a function f(cos u) in ultraspherical (Gegenbauer) polynomials. We prove that these coeffic...