Langevin dynamics with dichotomous noise; direct simulation and applications

被引：53

作者：

Barik, D ^{[1
]}

Ghosh, PK ^{[1
]}

Ray, DS ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Kolkata 700032, W Bengal, India

来源：

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT | 2006年

关键词：

dynamical processes (theory); stochastic processes (theory); transport properties (theory); molecular motors (theory);

D O I：

10.1088/1742-5468/2006/03/P03010

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

We consider the motion of a Brownian particle moving in a potential field and driven by dichotomous noise with exponential correlation. Traditionally, the analytic as well as the numerical treatments of the problem, in general, rely on a Fokker - Planck description. We present a method for direct numerical simulation of dichotomous noise to solve the Langevin equation. The method is applied to calculate the nonequilibrium fluctuation induced current in a symmetric periodic potential using asymmetric dichotomous noise and compared to a Fokker - Planck - master equation based algorithm for a range of parameter values. Our second application concerns the study of resonant activation over a fluctuating barrier.

引用

页数：14

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