Two-point Correlations and Critical Line of the Driven Ising Lattice Gas in a High Temperature Expansion

Details Two-point Correlations and Critical Line of the Driven Ising Lattice Gas in a High Temperature Expansion Two-point Correlations and Critical Line of the Driven Ising Lattice Gas in a High Temperature Expansion

1997-12-05

arxiv.org/abs/cond-mat/9712059v2

Physics

Condensed Matter

Statistical Mechanics

17 pages, no figures. Some typos corrected. To appear in J. Stat. Phys. (May 1998)

Scientific paper

Based on a high temperature expansion, we compute the two-point correlation function and the critical line of an Ising lattice gas driven into a non-equilibrium steady state by a uniform bias E. The lowest nontrivial order already reproduces the key features, i.e., the discontinuity singularity of the structure factor and the (qualitative) E-dependence of the critical line. Our approach is easily generalized to other non-equilibrium lattice models and provides a simple analytic tool for the study of the high temperature phase and its boundaries.

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