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arXiv 1803.04740cond-mat.stat-mech
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隐慢自由度和涨落定理:一个解析可解模型

Hidden slow degrees of freedom and fluctuation theorems: an analytically solvable model

Marcel Kahlen, Jannik Ehrich

摘要:

在随机热力学的某些情况下,并不是所有相关的慢自由度都是可接近的。因此,人们采用了一种只涉及可见自由度的有效描述。这引起了违反标准涨落定理的明显的熵产生。我们提出了一个解析可解的模型,说明如何修改波动定理。此外,我们定义了一个替代表观熵产生:边际熵产生满足波动定理的通常形式。我们表明,非马尔可夫性的可见过程是负责的波动定理的偏差。

英文摘要:

In some situations in stochastic thermodynamics not all relevant slow degrees of freedom are accessible. Consequently, one adopts an effective description involving only the visible degrees of freedom. This gives rise to an apparent entropy production that violates standard fluctuation theorems. We present an analytically solvable model illustrating how the fluctuation theorems are modified. Furthermore, we define an alternative to the apparent entropy production: the marginal entropy production which fulfills the fluctuation theorems in the usual form. We show that the non-Markovianity of the visible process is responsible for the deviations in the fluctuation theorems.

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