Colored-noise-induced multistability in nonequilibrium phase transitions

We investigate the colored-noise effect on nonequilibrium phase transitions. A simple model is studied analytically in the presence of a dichotomous multiplicative noise. In the white-noise limit, the model shows a nonequilibrium phase transition. With a finite correlation time of the noise, the system exhibits multistability of ordered and disordered states and as the coupling strength increases, it also shows a reentrant transition into the disordered phase. Numerical simulation results are presented confirming the existence of the multistability and the reentrant transition.