High Temperature Expansion for a Driven Bilayer System |
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Authors: | I. Mazilu B. Schmittmann |
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Affiliation: | (1) Department of Physics and Engineering, Washington and Lee University, Lexington, Virginia, 24450;(2) Physics Department, Virginia Tech, Center for Stochastic Processes in Science and Engineering, Blacksburg, Virginia, 24061-0435 |
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Abstract: | Based directly on the microscopic lattice dynamics, a simple high temperature expansion can be devised for non-equilibrium steady states. We apply this technique to investigate the disordered phase and the phase diagram for a driven bilayer lattice gas at half filling. Our approximation captures the phases first observed in simulations, provides estimates for the transition lines, and allows us to compute signature observables of non-equilibrium dynamics, namely, particle and energy currents. Its focus on non-universal quantities offers a useful analytic complement to field-theoretic approaches. |
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Keywords: | Non-equilibrium steady states driven lattice gases high temperature series expansion |
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