Bulk-driven nonequilibrium phase transitions in a mesoscopic ring

We study a periodic one-dimensional exclusion process composed of a
driven and a diffusive part. In a mesoscopic limit where both
dynamics compete we identify bulk-driven phase transitions. We
employ mean-field theory complemented by Monte Carlo simulations to
characterize the emerging nonequilibrium steady states. Monte Carlo
simulations reveal interesting correlation effects that we explain
phenomenologically.