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arXiv · 1002.4349

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

Punyabrata Pradhan·Christian P. Amann·Udo Seifert
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Abstract

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.

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Punyabrata Pradhan, Christian P. Amann, Udo Seifert. 2010-11-17. Nonequilibrium steady states in contact: Approximate thermodynamic structure and zero-th law for driven lattice gases. https://doi.org/10.1103/physrevlett.105.150601

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