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arXiv 2202.02630cond-mat.stat-mechcond-mat.soft
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涨落势中扩散的非平衡热力学

Non-equilibrium thermodynamics of diffusion in fluctuating potentials

Henry Alston, Luca Cocconi, Thibault Bertrand

摘要:

在稳定状态下,正的熵产生率是真正非平衡过程的一个显著特征。精确的结果,而往往限于简单的模型,提供了一个独特的机会,探索这些过程的热力学特征的全部细节。在这里,我们推导出分析结果的稳态熵产生率在单粒子系统驱动远离平衡的波动的外部潜力的任意形状。随后,我们提供了精确的结果,扩散粒子在谐波陷阱的潜在刚度随时间变化,根据离散和连续马尔可夫过程。特别是,研究的情况下,一个完全间歇性的潜力,使我们能够引入一个有效的随机重置模型,它是可能的,以获得有限的非负熵产生。总之,这项工作奠定了基础的非平衡热力学理论的波动电位,立即应用于随机重置过程,波动的光阱和波动的相互作用在生活系统中。

英文摘要:

A positive rate of entropy production at steady state is a distinctive feature of truly non-equilibrium processes. Exact results, while being often limited to simple models, offer a unique opportunity to explore the thermodynamic features of these processes in full details. Here we derive analytical results for the steady-state rate of entropy production in single particle systems driven away from equilibrium by the fluctuations of an external potential of arbitrary shapes. Subsequently, we provide exact results for a diffusive particle in a harmonic trap whose potential stiffness varies in time according to both discrete and continuous Markov processes. In particular, studying the case of a fully intermittent potential allows us to introduce an effective model of stochastic resetting for which it is possible to obtain finite non-negative entropy production. Altogether, this work lays the foundation for a non-equilibrium thermodynamic theory of fluctuating potentials, with immediate applications to stochastic resetting processes, fluctuations in optical traps and fluctuating interactions in living systems.

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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