title: Criterion for phase separation in one-dimensional driven systems.
abstract: A general criterion for the existence of phase separation in driven density-conserving one-dimensional systems is proposed. It is suggested that phase separation is related to the size dependence of the steady-state currents of domains in the system. A quantitative criterion for the existence of phase separation is conjectured using a correspondence made between driven diffusive models and zero-range processes. The criterion is verified in all cases where analytical results are available, and predictions for other models are provided.
authors.affiliation: Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, Israel 76100.
authors.forename: Y
authors.initials: Y
authors.lastname: Kafri
authors.forename: E
authors.initials: E
authors.lastname: Levine
authors.forename: D
authors.initials: D
authors.lastname: Mukamel
authors.forename: G M
authors.initials: GM
authors.lastname: Schütz
authors.forename: J
authors.initials: J
authors.lastname: Török