Abstract
We investigate the dynamics of a three-state stochastic lattice gas consisting of holes and two oppositely “charged” species of particles, under the influence of an “electric” field at zero total charge. Interacting only through an excluded-volume constraint, particles exchange with holes and, on a slower time scale, with each other. Using a combination of Monte Carlo simulations and meanfield equations of motion, we study a set of suitably defined order parameters, their histograms and fluctuations, as well as the current through the system. With increasing particle density and drive, the system first orders into a charge-segregated state, and then disorders again near complete filling. The transition is first order at low densities and turns second order at higher ones. The finite-size and aspect-ratio dependence of characteristic quantities is discussed at the mean-field level.
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Korniss, G., Schmittmann, B. & Zia, R.K.P. Nonequilibrium phase transitions in a simple three-state lattice gas. J Stat Phys 86, 721–748 (1997). https://doi.org/10.1007/BF02199117
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DOI: https://doi.org/10.1007/BF02199117