Mean-field theory of the driven diffusive lattice gas

Publisher Website
Google Scholar
Abstract
The nonequilibrium driven diffusive lattice gas is studied by dynamic mean-field theory (MFT) at the pair and square levels. In contrast with previous MFT treatments, the present formulation permits study of the original model (isotropic hopping rates) and arbitrary driving field strength. Metropolis and Kawasaki dynamics are considered. As is found in simulations, the critical temperature is elevated in the presence of the driving field. This effect is mediated by anisotropy of correlations. There are several (unphysical) anomalies associated with singularities in the Metropolis rates.