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arXiv 1402.1235cond-mat.stat-mech
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“隐熵产生涨落定理”述评

Comment on "Fluctuation theorem for hidden entropy production"

Yongjoo Baek, Meesoon Ha, Hawoong Jeong, Hyunggyu Park

摘要:

最近,Kawaguchi和Nakayama(KN)[Phys. Rev. E { \bf 88},022147(2013)]表明,如果原始过程不涉及在时间反演下改变其符号的任何奇宇称变量,则与粗粒化过程相关联的隐熵产生服从积分涨落定理(IFT)。这被解释为奇宇称变量在从时间可逆确定性动力学推导不可逆随机动力学中起重要作用的证据。在这篇评论中,我们表明,KN的方法是不足以描述的起源不可逆的随机动力学,这就要求的问题是否需要奇宇称变量的出现宏观不可逆性。

英文摘要:

Recently, Kawaguchi and Nakayama (KN) [Phys. Rev. E {\bf 88}, 022147 (2013)] showed that the hidden entropy production associated with a coarse-graining procedure obeys the integral fluctuation theorem (IFT) if the original process does not involve any odd-parity variable that changes its sign under time reversal. This was interpreted as the evidence that odd-parity variables play an important role in the derivation of irreversible stochastic dynamics from time-reversible deterministic dynamics. In this Comment, we show that KN's approach is inadequate for describing the origin of irreversible stochastic dynamics, which calls into question whether odd-parity variables are required for the emergence of macroscopic irreversibility.

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