Kramers rate for thermal plus dichotomous noise applied to ratchets
Kramers rate for thermal plus dichotomous noise applied to ratchets
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DOI：
10.1103/physrevlett.77.5328
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发表时间：
1996-12-30
影响因子：
8.6
通讯作者：
Elston, TC
中科院分区：
文献类型：
--
作者：
Reimann, P;Elston, TC
研究了二分噪声和热噪声共同作用下过阻尼布朗粒子的Kramers逃逸问题。在弱热噪声的极限下，得到了一个渐近精确的速率公式，该公式适用于二分噪声的一般势和任意关联时间。我们的预测得到了准确的数值结果的验证，并讨论了它们对非平衡势、共振激活和布朗电动机的影响。
The Kramers escape problem for an overdamped Brownian particle subjected to both dichotomous and thermal noise is studied. In the limit of weak thermal noise an asymptotically exact rate formula is obtained that is valid for general potentials and arbitrary correlation times of the dichotomous noise. Our predictions are verified by accurate numerical results and their consequences with regards to nonequilibrium potentials, resonant activation, and Brownian motors are discussed.