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It has previously been shown that the Einstein equation can be derived from the requirement that the Clausius relation dS = dQ/T hold for all local acceleration horizons through each spacetime point, where dS is one quarter the horizon area…

广义相对论与量子宇宙学 · 物理学 2011-05-05 Christopher Eling , Raf Guedens , Ted Jacobson

We present the exact analytical equation of diffusion-mobility for two-dimensional (2D) Schr\"odinger type transport systems, from molecules to materials. The density of electronic states in such Schr\"odinger systems pertains to the 2D…

统计力学 · 物理学 2019-09-27 K. Navamani

Einstein's equations in matter are gravitational analogues of Maxwell's equations in matter, providing an effective classical description of gravitational fields. We derive Einstein's equations in matter for relativistic fluids, and use…

广义相对论与量子宇宙学 · 物理学 2020-05-29 Pavel Kovtun , Ashish Shukla

We propose a unified diffusion-mobility relation which quantifies both quantum and classical levels of understanding on electron dynamics in ordered and disordered materials. This attempt overcomes the inability of classical Einstein…

其他凝聚态物理 · 物理学 2017-05-11 K. Navamani , Swapan K. Pati

We study consequences of gauge invariance and charge conservation of an electron gas in a strong random potential perturbed by a weak electromagnetic field. We use quantum equations of motion and Ward identities for one- and two-particle…

无序系统与神经网络 · 物理学 2008-09-16 V. Janis , J. Kolorenc , V. Spicka

The Einstein equation is derived from the proportionality of entropy and horizon area together with the fundamental relation $\delta Q=TdS$ connecting heat, entropy, and temperature. The key idea is to demand that this relation hold for all…

广义相对论与量子宇宙学 · 物理学 2010-11-01 Ted Jacobson

We study the long-range effective drift and diffusivity of a particle in a random medium moving subject to a given molecular diffusivity and a local drift. The local drift models the effect of a random electrostatic field on a neutral but…

无序系统与神经网络 · 物理学 2009-10-30 I. T. Drummond , R. R. Horgan , C. A. da Silva Santos

Recent developments in observational cosmology have led to attempts to make modifications on both sides of the Einstein equation to explain some of the puzzling new findings. What follows is an examination of the source of gravity that we…

宇宙学与河外天体物理 · 物理学 2014-01-23 Edward A Spiegel

The celebrated Einstein relation between the diffusion coefficient $D$ and the drift velocity $v$ is violated in non-equilibrium circumstances. We analyze how this violation emerges for the simplest example of a Brownian motion on a…

统计力学 · 物理学 2014-09-30 Daniel Hurowitz , Doron Cohen

In the present work there was found a class of noninertial frames of reference, which satisfy Einstein "equivalency" principle more than the known noninertial frames - these are strongly swirling gaseous flows. Field intensity and potential…

流体动力学 · 物理学 2012-05-14 Vyacheslav Volov

Einstein's relation E=Mc^2 between the energy E and the mass M is the cornerstone of the relativity theory. This relation is often derived in a context of the relativistic theory for closed systems which do not accelerate. By contrast,…

数学物理 · 物理学 2015-06-05 Anatoli Babin , Alexander Figotin

We review the non-relativistic Green's-function approach to the kinetic equations for Fermi liquids far from equilibrium. The emphasis is on the consistent treatment of the off-shell motion between collisions and on the non-instant and…

核理论 · 物理学 2017-03-08 P. Lipavsky , K. Morawetz , V. Spicka

In strongly interacting electron systems with low density and at low temperature the thermodynamic density of states is negative. It creates difficulties with understanding of the Einstein relation between conductivity and diffusion…

强关联电子 · 物理学 2009-11-13 A. L. Efros

We investigate the behavior of energy fluctuations in several models of granular gases maintained in a non-equilibrium steady state. In the case of a gas heated from a boundary, the inhomogeneities of the system play a predominant role.…

统计力学 · 物理学 2007-05-23 P. Visco , A. Puglisi , A. Barrat , F. van Wijland , E. Trizac

Concepts underlying the Enskog kinetic theory of hard-spheres are applied to include short-range correlation effects in a model for transport coefficients of strongly coupled plasmas. The approach is based on an extension of the effective…

等离子体物理 · 物理学 2015-06-11 Scott D. Baalrud , Jerome Daligault

A kinetic theory for moderately dense gases of inelastic and rough spherical molecules is developed from the Enskog equation where a macroscopic state is characterized by 29 scalar fields which correspond to the moments of the distribution…

统计力学 · 物理学 2024-08-02 Gilberto M. Kremer

We propose a revised formulation of General Relativity for cosmological settings, in which the Einstein constant varies with the energy density of the Universe. We demonstrate that this modification has only phenomenological impact of…

广义相对论与量子宇宙学 · 物理学 2025-08-28 Giovanni Montani , Giulia Maniccia , Elisa Fazzari , Alessandro Melchiorri

We investigate the diffusion of an intruder in a granular gas, with both components modeled as smooth hard spheres, both immersed in a low viscosity carrier fluid to form a particle-laden suspension. In this system, dissipative particle…

软凝聚态物质 · 物理学 2026-03-27 Antonio M. Puertas , Rubén Gómez González

The non-equilibrium statistical mechanics and kinetic theory for a model of a confined quasi-two-dimensional gas of inelastic hard spheres is presented. The dynamics of the particles includes an effective mechanism to transfer the energy…

统计力学 · 物理学 2015-06-18 J. Javier Brey , M. I. García de Soria , P. Maynar , V. Buzón

We analyze the generic structure of Einstein tensor projected onto a 2-D spacelike surface S defined by unit timelike and spacelike vectors u_i and n_i respectively, which describe an accelerated observer (see text). Assuming that flow…

广义相对论与量子宇宙学 · 物理学 2011-02-01 Dawood Kothawala