Stability measures in metastable states with Gaussian colored noise
- Authors: Fiasconaro, A; Spagnolo, B
- Publication year: 2009
- Type: Articolo in rivista (Articolo in rivista)
- Key words: Stochastic Mechanics, Noise, Nonlinear systems
- OA Link: http://hdl.handle.net/10447/46768
Abstract
We present a study of the escape time from a metastable state of an overdamped Brownian particle in the presence of colored noise generated by Ornstein-Uhlenbeck process. We analyze the role of the correlation time on the enhancement of the mean first passage time through a potential barrier and on the behavior of the mean growth rate coefficient as a function of the noise intensity. We observe the noise-enhanced stability effect for all the initial unstable states used and for all values of the correlation time c investigated. We can distinguish two dynamical regimes characterized by weak and strong correlated noises, depending on the value of c with respect to the relaxation time of the system.