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We discuss many-body fermionic and bosonic systems subject to dissipative particle losses in arbitrary spatial dimensions $d$, within the Keldysh path-integral formulation of the quantum master equation. This open quantum dynamics…

统计力学 · 物理学 2025-02-27 Federico Gerbino , Igor Lesanovsky , Gabriele Perfetto

This paper treats the solvability of a semilinear reaction-diffusion system, which incorporates transport (diffusion) and reaction effects emerging from two separated spatial scales: $x$ - macro and $y$ - micro. The system's origin connects…

偏微分方程分析 · 数学 2012-02-10 Tasnim Fatima , Adrian Muntean , Toyohiko Aiki

We review generalized Fluctuation-Dissipation Relations which are valid under general conditions even in ``non-standard systems'', e.g. out of equilibrium and/or without a Hamiltonian structure. The response functions can be expressed in…

统计力学 · 物理学 2019-09-10 A. Sarracino , A. Vulpiani

Quantum integrable systems have very strong mathematical properties that allow an exact description of their energetic spectrum. From the Bethe equations, I formulate the Baxter "T-Q" relation, that is the starting point of two…

数学物理 · 物理学 2015-03-17 Giovanni Feverati

The convergence to equilibrium of mass action reaction-diffusion systems arising from networks of chemical reactions is studied. The considered reaction networks are assumed to satisfy the detailed balance condition and have no boundary…

偏微分方程分析 · 数学 2017-02-13 Klemens Fellner , Bao Quoc Tang

We study the evolution of fronts in a bistable reaction-diffusion system when the nonlinear reaction term is spatially non-homogeneous. This equation has been used to model wave propagation in various biological systems. Extending previous…

斑图形成与孤子 · 物理学 2009-10-31 Horacio G. Rotstein , Anatol M. Zhabotinsky , Irving R. Epstein

Given a reaction-advection-diffusion system modelling the sulphation phenomenon, we derive a single regularised non-conservative and path-dependent nonlinear partial differential equation and propose a probabilistic interpretation via a…

概率论 · 数学 2025-10-14 Daniela Morale , Leonardo Tarquini , Stefania Ugolini

This paper deals with the solution of unified fractional reaction-diffusion systems. The results are obtained in compact and elegant forms in terms of Mittag-Leffler functions and generalized Mittag-Leffler functions, which are suitable for…

经典分析与常微分方程 · 数学 2014-09-11 R. K. Saxena , A. M. Mathai , H. J. Haubold

Q-conditional symmetries (nonclassical symmetries) for the general class of two-component reaction-diffusion systems with non-constant diffusivities are studied. Using the recently introduced notion of Q-conditional symmetries of the first…

数学物理 · 物理学 2019-09-17 Roman Cherniha , Vasyl' Davydovych

The reversible reactions like A+B <-> C in the many-component diffusive system affect the diffusive properties of the constituents. The effective conjugation of irreversible processes of different dimensionality takes place due to the…

其他凝聚态物理 · 物理学 2007-05-23 Serge Shpyrko , Vladimir M. Sysoev

This paper proposes a novel reaction-diffusion system approximation tailored for singular diffusion problems, typified by the fast diffusion equation. While such approximation methods have been successfully applied to degenerate parabolic…

偏微分方程分析 · 数学 2026-04-01 Hideki Murakawa , Florian Salin

Reaction-diffusion systems where transition rates exhibit quenched disorder are common in physical and chemical systems. We study pair reactions on a periodic two-dimensional lattice, including continuous deposition and spontaneous…

无序系统与神经网络 · 物理学 2010-11-10 A. Wolff , I. Lohmar , J. Krug , Y. Frank , O. Biham

The stationary state of stochastic processes such as reaction-diffusion systems can be related to the ground state of a suitably defined quantum Hamiltonian. Using this analogy, we investigate the applicability of a real space…

统计力学 · 物理学 2007-05-23 J. Hooyberghs , C. Vanderzande

The trend to equilibrium for reaction-diffusion systems modelling chemical reaction networks is investigated, in the case when reaction processes happen on subsets of the domain. We prove the convergence to equilibrium by directly showing…

偏微分方程分析 · 数学 2024-12-17 Laurent Desvillettes , Kim Dang Phung , Bao Quoc Tang

We study one-dimensional reaction-diffusion models described by master equations and their associated two-state quantum Hamiltonians. By choosing appropriate rates, the equations of motion decouple into certain subsets. We solve the first…

凝聚态物理 · 物理学 2009-10-22 I. Peschel , V. Rittenberg , U. Schultze

The replicator equation is ubiquitous for many areas of mathematical biology. One of major shortcomings of this equation is that it does not allow for an explicit spatial structure. Here we review analytical approaches to include spatial…

种群与进化 · 定量生物学 2011-05-06 Artem S. Novozhilov , Vladimir P. Posvyanskii , Alexander S. Bratus

The microscopic structure and movement of reaction fronts in reaction diffusion systems far from equilibrium are investigated. We show that some three-site interaction models exhibit exact diffusive shock measures, i.e. domains of different…

统计力学 · 物理学 2009-11-10 Matthias Paessens , Gunter M. Schuetz

The dynamics of ecological as well as chemical systems may depend on heterogeneous configurations. Heterogeneity in reaction-diffusion systems often increase modelling and simulating difficulties when non-linear effects are present. One…

物理与社会 · 物理学 2019-08-27 Orlando Silva

We develop and implement new probabilistic strategy for proving basic results about long time behaviour for interacting diffusion processes on unbounded lattice. The concept of the solution used is rather weak as we construct the process as…

概率论 · 数学 2016-11-08 Frantisek Zak

To investigate novel aspects of pattern formation in spin systems, we use a mapping between reactive concentrations in a reaction-diffusion system and spin orientations in a dynamic multiple-spin Ising model. While pattern formation in…

适应与自组织系统 · 物理学 2019-10-15 Mélody Merle , Laura Messio , Julien Mozziconacci