6533b823fe1ef96bd127f841
RESEARCH PRODUCT
Stability measures in metastable states with Gaussian colored noise
Bernardo SpagnoloAlessandro Fiasconarosubject
Statistical Mechanics (cond-mat.stat-mech)FOS: Physical sciencesFunction (mathematics)Stability (probability)Colors of noiseStochastic Mechanics Noise Nonlinear systemsMetastabilityRectangular potential barrierStatistical physicsGrowth rateFirst-hitting-time modelBrownian motionCondensed Matter - Statistical MechanicsMathematicsdescription
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 $\tau_c$ investigated. We can distinguish two dynamical regimes characterized by weak and strong correlated noise respectively, depending on the value of $\tau_c$ with respect to the relaxation time of the system.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-01-01 |