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arXiv 1902.01356cond-mat.stat-mech
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过阻尼系统的非马尔可夫效应

Non-Markovian Effects on Overdamped Systems

Eduardo dos S. Nascimento, Welles A. M. Morgado

摘要:

我们研究的后果,采用记忆依赖,非马尔可夫,物理与无记忆的过阻尼近似通常用于调查布朗粒子。由于与噪声相关联的有限相关时间尺度,系统的稳态行为不由Boltzmann-Gibbs统计描述。然而,一个非常弱的外部白噪声的存在下,可以用来正则化的平衡性质。令人惊讶的是,与另一个浴的耦合有效地恢复了过阻尼处理所错过的动态方面。

英文摘要:

We study the consequences of adopting the memory dependent, non-Markovian, physics with the memory-less over-damped approximation usually employed to investigate Brownian particles. Due to the finite correlation time scale associated with the noise, the stationary behavior of the system is not described by the Boltzmann-Gibbs statistics. However, the presence of a very weak external white noise can be used to regularize the equilibrium properties. Surprisingly, the coupling to another bath effectively restores the dynamical aspects missed by the over-damped treatment.

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