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

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

2010-02-23

arxiv.org/abs/1002.4349v2

PRL 105, 150601 (2010)

Physics

Condensed Matter

Statistical Mechanics

Revised, 4 pages, 5 figures

Scientific paper

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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