Global phase diagram of a one-dimensional driven lattice gas

We investigate the nonequilibrium stationary state of a translationally inv ariant one-dimensional driven lattice gas with short-range interactions. Th e phase diagram is found to exhibit a line of continuous transitions from a disordered phase to a phase with spontaneous symmetry breaking. At the pha se transition the correlation length is infinite and density correlations d ecay algebraically. Depending on the parameters which define the dynamics, the transition either belongs to the universality class of directed percola tion or to a universality class of a growth model which preserves the local minimal height. Consequences of mappings to other models are briefly discu ssed. [S0031-9007(98)08100-9].