Invariance of steady-state thermodynamics between different scales of description
Invariance of steady-state thermodynamics between different scales of description
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不同描述尺度之间稳态热力学的不变性
DOI：
10.1103/physreve.91.012115
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发表时间：
2015
影响因子：
2.4
通讯作者：
Kyogo Kawaguchi
中科院分区：
文献类型：
--
作者：
Yohei Nakayama;Kyogo Kawaguchi
通过考虑一般马尔可夫随机动力学及其粗粒化，我们研究了随机热力学的框架，为原始和减少描述对应于不同的尺度。我们特别关注的情况下，不可逆的熵产生有一个有限的差异之间的尺度。我们发现，非平衡熵的增量和熵产生的过剩部分，这是在稳态热力学的建设中的关键量的总和，基本上是保持不变的描述尺度的变化。这一普遍结果证明了基于粗粒度变量的稳态热力学实验方法的合理性。我们证明了我们的结果在一个介观热机系统。
By considering general Markov stochastic dynamics and its coarse graining, we study the framework of stochastic thermodynamics for the original and reduced descriptions corresponding to different scales. We are especially concerned with the case where the irreversible entropy production has a finite difference between the scales. We find that the sum of the increment of the nonequilibrium entropy and the excess part of the entropy production, which are key quantities in the construction of steady-state thermodynamics, is essentially kept invariant with respect to the change in the scales of description. This general result justifies experimental approaches toward steady-state thermodynamics based on coarse-grained variables. We demonstrate our result in a mesoscopic heat engine system.