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arXiv 1902.03148cond-mat.soft
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一维瞬态活动布朗粒子的逃逸率

Escape rate of transiently active Brownian particle in one dimension

A. Scacchi, J. M. Brader, A. Sharma

摘要:

活动显着提高布朗粒子越过势垒的逃逸率。尽管在过去已经广泛地研究了恒定的活动,但是对于时间依赖的活动对粒子逃逸率的影响知之甚少。本文研究了具有瞬时活动性的布朗粒子的逃逸问题,在逃逸过程中,粒子的活动性迅速降低。使用有效平衡的方法,我们分析计算的逃逸率,假设粒子是完全被动或完全主动时,跨越障碍。我们进行了一维逃逸过程的数值模拟,发现与理论预测很好的协议。

英文摘要:

Activity significantly enhances the escape rate of a Brownian particle over a potential barrier. Whereas constant activity has been extensively studied in the past, little is known about the effect of time-dependent activity on the escape rate of the particle. In this paper we study the escape problem for a Brownian particle that is transiently active; the activity decreases rapidly during the escape process. Using the effective equilibrium approach we analytically calculate the escape rate, under the assumption that the particle is either completely passive or fully active when crossing the barrier. We perform numerical simulations of the escape process in one dimension and find good agreement with the theoretical predictions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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