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arXiv 2008.00778quant-phcond-mat.stat-mech
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量子热机的效率大偏差函数

Efficiency large deviation function of quantum heat engines

Tobias Denzler, Eric Lutz

摘要:

小型热机的效率通常是一个波动的量。本文研究了谐振子和二能级奥托循环两种典型量子热机的效率大偏差函数。虽然效率统计遵循Verley et al. [Nature Commun. 5,4721(2014)]对于非绝热驱动,我们发现后一种框架不适用于绝热区域。我们将这一不寻常的性质与一般发生在广泛的一类标度不变的绝热量子奥托热机和抑制热以及量子波动的工作输出和热输入之间的完美关系。

英文摘要:

The efficiency of small thermal machines is typically a fluctuating quantity. We here study the efficiency large deviation function of two exemplary quantum heat engines, the harmonic oscillator and the two-level Otto cycles. While the efficiency statistics follows the 'universal' theory of Verley et al. [Nature Commun. 5, 4721 (2014)] for nonadiabatic driving, we find that the latter framework does not apply in the adiabatic regime. We relate this unusual property to the perfect anticorrelation between work output and heat input that generically occurs in the broad class of scale-invariant adiabatic quantum Otto heat engines and suppresses thermal as well as quantum fluctuations.

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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