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A generalized anisotropic-diffusion framework is developed for transport problem in media described by a tensorial scattering coefficient and a scalar Henyey--Greenstein asymmetry factor. In this regime the classical similarity relation…

光学 · 物理学 2026-02-24 Ernesto Pini , Michele Giusfredi , Lorenzo Pattelli

With the help of a semi-classical kinetic theory, a new collision kernel is proposed, which simultaneously conserves the energy-momentum tensor and the spin tensor of a relativistic fluid of spin-1/2 particles irrespective of the frame and…

高能物理 - 唯象学 · 物理学 2025-03-12 Samapan Bhadury

We show that the average trajectories of relativistic quantum particles in Schwarzschild spacetime, obtained via quantum mechanical weak measurements of momentum and energy, are equivalent to the predicted flow lines of probability current…

量子物理 · 物理学 2025-01-20 Joshua Foo , Cameron Bellamy , Timothy C. Ralph

We propose a new, transport-theoretic (tt) class of relativistic extensions of quantum field theories of fundamental interactions. Its concepts are inspired by Feynman's atomistic idea about the physical world and by the extension of fluid…

高能物理 - 理论 · 物理学 2007-05-23 Marijan Ribaric , Luka Sustersic

A thermodynamic framework that predicts the thermal conductivity $\lambda$ of simple fluids beyond the dilute-gas limit is introduced. By generalizing the transition-rate approach of particles on a lattice to conserved quantities in…

统计力学 · 物理学 2025-12-03 Miguel Hoyuelos

A diffusion's induced transport is defined for a linear model of a Fokker-Plank equation under periodic boundary conditions in one-dimensional geometry. The flow is generated by a diffusion and a periodic deriving force induced by a…

数学物理 · 物理学 2008-09-04 Gershon Wolansky

We generalize a recent prescription for the relaxation time approximation for the relativistic Boltzmann equation for systems with multiple particle species at finite temperature. This is performed by adding counter-terms to the traditional…

核理论 · 物理学 2025-10-21 Gabriel S. Rocha , Gabriel S. Denicol

The inelastic Boltzmann equation for a granular gas is applied to spatially inhomogeneous states close to the uniform shear flow. A normal solution is obtained via a Chapman-Enskog-like expansion around a local shear flow distribution. The…

软凝聚态物质 · 物理学 2009-11-11 Vicente Garzo

A generalised phase-space kinetic Boltzmann equation for highly non-equilibrium charged particle transport via localised and delocalised states is used to develop continuity, momentum and energy balance equations, accounting explicitly for…

统计力学 · 物理学 2017-04-19 Peter W. Stokes , Bronson Philippa , Daniel Cocks , Ronald D. White

We systematically derived hydrodynamic equations and transport coefficients for a class of multi-speed lattice Boltzmann models in D dimensions, using the multi-scale technique. The constitutive relation of physical fluid is recovered by a…

comp-gas · 物理学 2008-02-03 Yu Chen , Hirotada Ohashi , Mamoru Akiyama

We derive the relativistic quantum kinetic equation for massless fermions with vector and axial vector interaction using the Wigner function formalism. The vector and axial vector currents are self-consistently treated with corresponding…

高能物理 - 唯象学 · 物理学 2024-07-04 Peiwei Yu , Xingyu Guo

In this essay, we discuss the notion of optimal transport on geodesic measure spaces and the associated (2-)Wasserstein distance. We then examine displacement convexity of the entropy functional on the space of probability measures. In…

度量几何 · 数学 2012-04-17 Otis Chodosh

We show that the spatially homogeneous Boltzmann equation evolves as the gradient flow of the entropy with respect to a suitable geometry on the space of probability measures which takes the collision process into account. This gradient…

偏微分方程分析 · 数学 2023-06-14 Matthias Erbar

We derive causal relativistic fluid dynamical equations from the relaxation model of kinetic theory as in a procedure previously applied in the case of non-relativistic rarefied gases. By treating space and time on an equal footing and…

广义相对论与量子宇宙学 · 物理学 2011-08-03 Xinzhong Chen , Edward A Spiegel

Beginning with a relativistic action principle for the irrotational flow of collisionless matter, we compute higher order corrections to the Zel'dovich approximation by deriving a nonlinear Hamilton-Jacobi equation for the velocity…

天体物理学 · 物理学 2015-06-24 D. S. Salopek , J. M. Stewart , K. M. Croudace

Radiative transfer in a relativistic plane-parallel flow, e.g., an accretion disk wind, is examined in the fully special relativistic treatment. Under the assumption of a constant flow speed, for the relativistically moving atmosphere we…

高能天体物理现象 · 物理学 2015-05-13 J. Fukue

Using the techniques developed in arxiv: 1203.3544 we compute the universal part of the equilibrium partition function characteristic of a theory with multiple abelian U(1) anomalies in arbitrary even spacetime dimensions. This contribution…

高能物理 - 理论 · 物理学 2015-06-05 Nabamita Banerjee , Suvankar Dutta , Sachin Jain , R. Loganayagam , Tarun Sharma

In this work two systems are analyzed within the framework of the relativistic Boltzmann equation. One of them refers to a description of binary mixtures of electrons and protons and of electrons and photons subjected to external…

统计力学 · 物理学 2014-04-29 Gilberto M. Kremer

We give a detailed derivation of the second-order (local) hydrodynamics for Boltzmann equation with an external force by using the renormalization group method. In this method, we solve the Boltzmann equation faithfully to extract the…

量子气体 · 物理学 2016-04-27 Yuta Kikuchi , Kyosuke Tsumura , Teiji Kunihiro

Within the framework of the post-Newtonian $2\frac12$ approximation theory, a kinetic theory for relativistic gases in the presence of gravitational fields is developed. The Boltzmann equation and the equilibrium Maxwell-J\"uttner…

广义相对论与量子宇宙学 · 物理学 2026-05-01 Gilberto M. Kremer