Reentrance phenomena in a bistable kinetic model driven by correlated noise

In this Letter we discuss a bistable model driven by two white noise sources, when the correlation time of the correlations between two sources tau is nonzero. We find that there is a critical value of the correlation time tau(c). For tau > tau(c), the system undergoes a succession of two phase transitions (namely, the reentrance phenomenon) as the strength of the correlations between two noise sources lambda is varied. However, for tau < tau(c), the system undergoes a (single) phase transition as lambda is varied.