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Combining analytical and numerical methods, we study within the framework of the homogeneous non-linear Boltzmann equation, a broad class of models relevant for the dynamics of dissipative fluids, including granular gases. We use the new…

统计力学 · 物理学 2007-09-23 E. Trizac , A. Barrat , M. H. Ernst

In the frame of the Boltzmann equation, wall-bounded flows of rarefied gases require the implementation of boundary conditions at the kinetic level. Such boundary conditions induce a discontinuity in the distribution function with respect…

流体动力学 · 物理学 2017-09-07 Victor E. Ambrus , Victor Sofonea , Richard Fournier , Stéphane Blanco

We apply a variant of the Nose-Hoover thermostat to derive the Hamiltonian of a nonextensive system that is compatible with the canonical ensemble of the generalized thermostatistics of Tsallis. This microdynamical approach provides a…

统计力学 · 物理学 2009-11-07 J. S. Andrade , M. P. Almeida , A. A. Moreira , G. A. Farias

Nonextensive quantum gas distributions are investigated on the basis of the factorization hypothesis of compound probability required by thermodynamic equilibrium. It is shown that the formalisms of Tsallis nonextensive statistical…

统计力学 · 物理学 2015-06-24 Qiuping A. Wang

We prove a central limit theorem for the momentum distribution of a particle undergoing an unbiased spatially periodic random forcing at exponentially distributed times without friction. The start is a linear Boltzmann equation for the…

数学物理 · 物理学 2015-05-14 Jeremy Clark , Christian Maes

A proof of the quantum $H$-theorem taking into account nonextensive effects on the quantum entropy $S^Q_q$ is shown. The positiveness of the time variation of $S^Q_q$ combined with a duality transformation implies that the nonextensive…

量子物理 · 物理学 2015-05-13 R. Silva , D. H. A. L. Anselmo , J. S. Alcaniz

The kinetic theory of dilute granular gases having an inverse power law repulsive potential is studied. We derive the time evolution of the temperature and the transport coefficients from the Boltzmann equation. We also investigate the…

软凝聚态物质 · 物理学 2024-06-18 Satoshi Takada

A statistical thermodynamic approach of moving particles forming an elastic body is presented which leads to reveal molecular-mechanical properties of classical and nonextensive dynamical systems. We derive the Boltzmann-Gibbs (BG) entropy…

统计力学 · 物理学 2009-11-10 Enrique Canessa

The instability of current-driven ion-acoustic waves in the collisionless magnetic-field-free space plasma is investigated by using a nonextensive approach. The ions and the electrons are thought of in the power-law distributions that can…

等离子体物理 · 物理学 2015-08-10 Zhipeng Liu , Liyan Liu , Jiulin Du

The dispersion relation of longitudinal electrostatic oscillations in a relativistic plasma is studied in the context of the nonextensive statistics formalism proposed by Tsallis [C. Tsallis, J. Stat. Phys. {\bf 52}, 479 (1988)], where…

等离子体物理 · 物理学 2007-05-23 Victor Munoz

The solutions of the one-dimensional homogeneous nonlinear Boltzmann equation are studied in the QE-limit (Quasi-Elastic; infinitesimal dissipation) by a combination of analytical and numerical techniques. Their behavior at large velocities…

统计力学 · 物理学 2007-07-03 Alain Barrat , E. Trizac , M. H. Ernst

We show that the zeroth law of thermodynamics holds within an alternative version of nonextensive statistical mechanics based on {\it incomplete probability distribution}. The generalized zeroth law leads to a generalized definition of…

统计力学 · 物理学 2007-05-23 Qiuping A. Wang

A kinetic equation for a dilute gas of hard spheres confined between two parallel plates separated a distance smaller than two particle dimeters is derived. It is a Boltzmann-like equation, which incorporates the effect of the confinement…

统计力学 · 物理学 2016-11-23 J. Javier Brey , P. Maynar , M. I. García de Soria

Some results for the black-body radiation obtained in the context of the $q$-thermostatistics are analyzed on both thermodynamical and statistical-mechanical levels. Since the thermodynamic potentials can be expressed in terms of the…

统计力学 · 物理学 2007-05-23 H. Chamati , A. Ts. Djankova , N. S. Tonchev

We show that within classical statistical mechanics without taking the thermodynamic limit, the most general Boltzmann factor for the canonical ensemble is a q-exponential function. The only assumption here is that microcanonical…

统计力学 · 物理学 2009-11-11 Rudolf Hanel , Stefan Thurner

The kinetic foundations of Tsallis' nonextensive thermostatistics are investigated through Boltzmann's transport equation approach. Our analysis follows from a nonextensive generalization of the ``molecular chaos hypothesis". For $q>0$, the…

凝聚态物理 · 物理学 2009-11-07 J. A. S. Lima , R. Silva , A. R. Plastino

The factorization problem of $q$-exponential distribution within nonextensive statistical mechanics is discussed on the basis of Abe's general pseudoadditivity for equilibrium systems. it is argued that the factorization of compound…

统计力学 · 物理学 2009-11-07 Qiuping A. Wang

This work deals with the physical system governed by a Hamiltonian operator, in two-dimensional space, of spinless charged particles subject to a perpendicular magnetic field B, coupled with a harmonic potential in the context of…

统计力学 · 物理学 2025-04-30 Bienvenu Gnim Adewi , Isiaka Aremua , Laure Gouba

It is natural important question for us to ask what the nonextensive parameter stands for when Tsallis statistics is applied to the self-gravitating systems. In this paper, some properties of the nonextensive parameter and Tsallis…

适应与自组织系统 · 物理学 2015-08-10 Jiulin Du

Q ball solutions are considered within the theory of a complex scalar field with a gauged U(1) symmetry and a parabolic-type potential. In the thin-walled limit, we show explicitly that there is a maximum size for these objects because of…

数学物理 · 物理学 2016-09-07 Xin-zhou Li , Jian-gang Hao , Dao-jun Liu , Guang Chen