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arXiv 1602.06182cond-mat.stat-mechquant-ph
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两个广义系综的宏观等价性与特殊相对熵

Macrostate equivalence of two general ensembles and specific relative entropies

Takashi Mori

摘要:

研究了一般状态对系综等价的两个判据:宏观态等价和测度等价。宏观态等价性意味着两个系综在遵循大偏差原理的宏观量测量下是不可区分的,而测量等价性意味着两个系综的特定相对熵在热力学极限下为零。它表明,测量等价性意味着宏观状态等价的一般状态对导出的不等式连接的大偏差率函数的特定的相对Renyi熵。这个结果既适用于量子系统,也适用于经典系统.作为应用,我们讨论了量子化的一个充分条件、宏观变量量子动力学的时标以及量子猝灭中严格不可逆的第二定律。

英文摘要:

The two criteria of ensemble equivalence, i.e. the macrostate equivalence and the measure equivalence, are investigated for a general pair of states. The macrostate equivalence implies the two ensembles are indistinguishable by the measurement of macroscopic quantities obeying the large-deviation principle, and the measure equivalence means that the specific relative entropy of these two states vanishes in the thermodynamic limit. It is shown that the measure equivalence implies the macrostate equivalence for a general pair of states by deriving an inequality connecting the large-deviation rate functions to the specific relative Renyi entropies. The result is applicable to both quantum and classical systems. As applications, a sufficient condition for thermalization, the timescale of quantum dynamics of macrovariables, and the second law with strict irreversibility in a quantum quench are discussed.

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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