title: Adiabatic approximation and parametric stochastic resonance in a bistable system with periodically driven barrier
abstract: In this paper we compare the analytical adiabatic exponential approximation and exact numerical description of fluctuation-induced transitions in a "quartic" potential with periodically driven barrier. We show that the adiabatic approximation gives an adequate description of the processes in a wide region of parameter space and the accuracy of the approximation improves with increasing noise intensity. For parameter values outside this region, a different kind of resonant activation, which we call parametric stochastic resonance, is observed.
authors.affiliation: Department of Physical Sciences "E.R. Caianiello," University of Salerno, via S. Allende, I84081 Baronissi (SA), Italy.
authors.initials: AL
authors.lastname: Pankratov
authors.initials: M
authors.lastname: Salerno