title: Double stochastic resonance in the mean-field q-state clock model.
abstract: A magnetic system with a phase transition at temperature T(c) may exhibit double-resonance peaks under a periodic external magnetic field because the time scale matches the external frequency at two different temperatures, one above T(c) and the other below T(c). We study the double-resonance phenomena for the mean-field q-state clock model based on the heat-bath-type master equation. We find double peaks as observed in the kinetic Ising case (q = 2) for all q ≥ 4, but for the three-state clock model (q = 3), the existence of double peaks is possible only above a certain external frequency since it undergoes a discontinuous phase transition.
authors.affiliation: School of Physics, Korea Institute for Advanced Study, Seoul 130-722, Korea.
authors.forename: Seung Ki
authors.initials: SK
authors.lastname: Baek
authors.forename: Beom Jun
authors.initials: BJ
authors.lastname: Kim
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D015233:Models, Statistical; D013269:Stochastic Processes; D013816:Thermodynamics