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We present a maximum entropy approach to analyze the internal dynamics of a small system in contact with a large bath e.g. a solute-solvent system. For the small solute, the fluctuations around the mean values of observables are not…

统计力学 · 物理学 2015-06-11 Purushottam D. Dixit

We investigate the convergence of spatial discretizations for reaction-diffusion systems with mass-action law satisfying a detailed balance condition. Considering systems on the d-dimensional torus, we construct appropriate space-discrete…

偏微分方程分析 · 数学 2025-04-10 Georg Heinze , Alexander Mielke , Artur Stephan

In this paper, the well-posedness of two-dimensional signal-dependent Keller-Segel system and its mean-field derivation from a interacting particle system on the whole space are investigated. The signal dependence effect is reflected by the…

偏微分方程分析 · 数学 2025-06-05 Lukas Bol , Li Chen , Yue Li

We revisit the sharp-interface continuum thermodynamics of two-phase multicomponent fluid systems with interfacial mass. Since the published work is not fully consistent, we provide a rigorous derivation of the local balance equations and…

流体动力学 · 物理学 2022-08-15 Dieter Bothe

Microscopic formula to describe the entropy of biomolecular solutions are derived based on the Gibbs formula of entropy, and the generalized Langevin theory combined with the RISM/3D-RISM theory. Two formula are derived: one is concerned…

统计力学 · 物理学 2023-03-02 Fumio Hirata

We present new results of existence of global solutions for a class of reaction cross-diffusion systems of two equations presenting a cross-diffusion term in the first equation, and possibly presenting a self-diffusion term in any (or both)…

偏微分方程分析 · 数学 2015-03-26 Ariane Trescases

We extract the complex frequency of the lowest quasi-normal mode from the holographically computed entropy density near thermodynamic equilibrium. The system consists of a purely thermal Supersymmetric Yang-Mills N=4 plasma in homogeneous…

高能物理 - 理论 · 物理学 2025-08-26 L. Araque , W. Barreto

General hyperbolic systems of balance laws with inhomogeneity in space and time in all constitutive functions are studied in the context of relative entropy. A framework is developed in this setting that contributes to a measure-valued weak…

偏微分方程分析 · 数学 2022-06-02 Cleopatra Christoforou

We investigate the nonequilibrium stationary states of systems consisting of chemical reactions among molecules of several chemical species. To this end we introduce and develop a stochastic formulation of nonequilibrium thermodynamics of…

统计力学 · 物理学 2018-07-04 Tânia Tomé , Mário J. de Oliveira

We propose and study a one-dimensional model which consists of two cross-diffusion systems coupled via a moving interface. The motivation stems from the modelling of complex diffusion processes in the context of the vapor deposition of thin…

偏微分方程分析 · 数学 2024-07-23 Clément Cancès , Jean Cauvin-Vila , Claire Chainais-Hillairet , Virginie Ehrlacher

The first paper of this series [J. Chem. Phys. 158, 034103 (2023)] demonstrated that excess entropy scaling holds for both fine-grained and corresponding coarse-grained (CG) systems. Despite its universality, a more exact determination of…

化学物理 · 物理学 2023-01-18 Jaehyeok Jin , Kenneth S. Schweizer , Gregory A. Voth

We study systems of reaction-diffusion equations with discontinuous spatially distributed hysteresis in the right-hand side. The input of hysteresis is given by a vector-valued function of space and time. Such systems describe hysteretic…

偏微分方程分析 · 数学 2013-09-27 Pavel Gurevich , Sergey Tikhomirov

In this paper, we study a parabolic reaction diffusion system with constraints that model biofilm growth. Within a unified framework encompassing multiple numerical schemes, we derive the first general convergence rates for approximating…

数值分析 · 数学 2025-11-05 Yahya Alnashri

Diffusion-a measure of dynamics, and entropy-a measure of disorder in the system, are found to be intimately correlated in many systems, and the correlation is often strongly non-linear. We explore the origin of this complex dependence by…

软凝聚态物质 · 物理学 2015-12-09 Kazuhiko Seki , Biman Bagchi

We present a new modeling approach for G protein coupled receptors signaling systems, that take into account the compartmentalization of receptors and their effectors, both at plasma membrane and in dynamic intra-cellular vesicles called…

偏微分方程分析 · 数学 2023-05-23 Claire Alamichel , Juan Calvo , Erwan Hingant , Saoussen Latrach , Nathan Quiblier , Romain Yvinec

As recently manifested , the quench dynamics of isolated quantum systems consisting of a finite number of particles, is characterized by an exponential spreading of wave packets in the many-body Hilbert space. This happens when the…

混沌动力学 · 物理学 2020-03-23 Samy Mailoud , Fausto Borgonovi , Felix Izrailev

In this paper we study the local instability to the boundary equilibria and the local stability to the positive equilibria for some chemical reaction-diffusion systems. We first analyze a three-species system with boundary equilibria in…

偏微分方程分析 · 数学 2020-03-12 Jiaxin Jin

In this study, a spatially distributed reaction-diffusion-advection (RDA) model with harvesting is investigated to signify the outcome of a competition between two competing species in a heterogeneous environment. The study builds upon the…

综合数学 · 数学 2024-12-03 Md. Kamrujjaman , Mayesha Sharmim Tisha

We present an analysis of two thermodynamic techniques for determining equilibria of self-gravitating systems. One is the Lynden-Bell entropy maximization analysis that introduced violent relaxation. Since we do not use the Stirling…

宇宙学与河外天体物理 · 物理学 2015-06-03 Eric I. Barnes , Liliya L. R. Williams

The equations of Lagrangian gas dynamics fall into the larger class of overdetermined hyperbolic and thermodynamically compatible (HTC) systems of partial differential equations. They satisfy an entropy inequality (second principle of…

数值分析 · 数学 2023-06-21 Walter Boscheri , Michael Dumbser , Pierre-Henri Maire