Stability measures in metastable states with Gaussian colored noise.
Stability measures in metastable states with Gaussian colored noise.
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DOI：
10.1103/physreve.80.041110
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发表时间：
2009-08
期刊：
影响因子：
--
通讯作者：
A. Fiasconaro;B. Spagnolo
中科院分区：
文献类型：
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作者：
A. Fiasconaro;B. Spagnolo
本文研究了由Ornstein-Uhlenbeck过程产生的色噪声作用下过阻尼布朗粒子从亚稳态的逃逸时间。我们分析了相关时间的作用，通过势垒的平均第一通过时间的增强和作为噪声强度的函数的平均增长率系数的行为。我们观察到的噪声增强的稳定性效果的所有初始不稳定状态和所有值的相关时间τ（c）的调查。我们可以区分两个动力学制度的特点是弱和强相关噪声，依赖于tau（c）的值相对于系统的弛豫时间。
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 noises, depending on the value of tau(c) with respect to the relaxation time of the system.