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Two-point correlations and critical line of the driven Ising lattice gas in a high-temperature expansion. (English) Zbl 0946.82032
Summary: 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 nonequilibrium 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 nonequilibrium lattice models and provides a simple analytic tool for the study of the high-temperature phase and its boundaries.

##### MSC:
 82C20 Dynamic lattice systems (kinetic Ising, etc.) and systems on graphs in time-dependent statistical mechanics 82C26 Dynamic and nonequilibrium phase transitions (general) in statistical mechanics
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