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arXiv 2008.11224cond-mat.stat-mech
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连续状态空间系统的随机热力学

Stochastic thermodynamics of system with continuous space of states

Mário J. de Oliveira

摘要:

我们分析了具有连续状态空间的系统的随机热力学。演化方程,熵产生率,和其他结果得到了一个连续的时间限制的离散时间制定。我们指出的作用,时间反演和耗散部分的概率流的熵的生产。我们表明,熵产生率是一个双线性形式的耗散概率电流的组件与系数的精度矩阵的组件相关的高斯噪声。我们还分析了一类噪声,它使能量函数沿随机轨道严格恒定,适合描述一个孤立系。这种类型的噪声导致非零熵产生,从而导致系统中熵的增加。这一结果与刘维方程预测的熵的不变性形成对比,刘维方程也描述了一个孤立系。

英文摘要:

We analyze the stochastic thermodynamics of systems with continuous space of states. The evolution equation, the rate of entropy production, and other results are obtained by a continuous time limit of a discrete time formulation. We point out the role of time reversal and of the dissipation part of the probability current on the production of entropy. We show that the rate of entropy production is a bilinear form in the components of the dissipation probability current with coefficients being the components of the precision matrix related to the Gaussian noise. We have also analyzed a type of noise that makes the energy function to be strictly constant along the stochastic trajectory, being appropriate to describe an isolated system. This type of noise leads to nonzero entropy production and thus to an increase of entropy in the system. This result contrasts with the invariance of the entropy predicted by the Liouville equation, which also describes an isolated system.

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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