title: Stochastic resonance in extended bistable systems: the role of potential symmetry.
abstract: We study the role of potential symmetry in a three-field reaction-diffusion system presenting bistability by means of a two-state theory for stochastic resonance in general asymmetric systems. By analyzing the influence of different parameters in the optimization of the signal-to-noise ratio, we observe that this magnitude always increases with the symmetry of the system's potential, indicating that it is this feature which governs the optimization of the system's response to periodic signals.
authors.affiliation: Comisión Nacional de Energía Atómica, Centro Atómico Bariloche and Instituto Balseiro (CNEA and UNC), 8400-San Carlos de Bariloche, Argentina. bouzat@cab.cnea.gov.ar
authors.forename: S
authors.initials: S
authors.lastname: Bouzat
authors.forename: H S
authors.initials: HS
authors.lastname: Wio