High temperature expansion for a driven bilayer system

Details High temperature expansion for a driven bilayer system High temperature expansion for a driven bilayer system

2003-01-22

arxiv.org/abs/cond-mat/0301421v1

Physics

Condensed Matter

Statistical Mechanics

16 pages, 6 figures. For submission to Journal of Statistical Physics

Scientific paper

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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