Nonequilibrium steady states in contact: Approximate thermodynamic structure and zero-th law for driven lattice gases

We explore driven lattice gases for the existence of an intensive thermodynamic variable which could determine "equilibration" between two nonequilibrium steady-state systems kept in weak contact. In simulations, we find that these systems satisfy surprisingly simple thermodynamic laws, su...

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Bibliographic Details
Published in:arXiv.org 2010-11
Main Authors: Pradhan, Punyabrata, Amann, Christian P, Seifert, Udo
Format: Article
Language:English
Subjects:
Steady state
Variations
Online Access:Get full text
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Summary:We explore driven lattice gases for the existence of an intensive thermodynamic variable which could determine "equilibration" between two nonequilibrium steady-state systems kept in weak contact. In simulations, we find that these systems satisfy surprisingly simple thermodynamic laws, such as the zero-th law and the fluctuation-response relation between the particle-number fluctuation and the corresponding susceptibility remarkably well. However at higher densities, small but observable deviations from these laws occur due to nontrivial contact dynamics and the presence of long-range spatial correlations.
ISSN:2331-8422
DOI:10.48550/arxiv.1002.4349