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arXiv 1701.07628quant-ph
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具有量子记忆的热力学第二定律

Second law of thermodynamics with quantum memory

Li-Hang Ren, Heng Fan

摘要:

我们设计了一个具有多热源、辅助系统和量子存储器的热机。通过分析过程中的熵变和量子互信息变化,得到了一个与热力学第二定律有关的不等式,并给出了一个新的关于发动机做功增益的限制条件.另外,通过两个独立的热机的组合,并利用熵不确定性与量子存储的关系,我们发现这两个热机所做的最大功之和应大于辅助态与量子存储之间的量子纠缠所涉及的量.这个结果提供了一个下限的最大工作提取,在传统的热力学第二定律的上限。然而,这个不等式的有效性取决于最大功是否能达到上界。

英文摘要:

We design a heat engine with multi-heat-reservoir, ancillary system and quantum memory. We then derive an inequality related with the second law of thermodynamics, and give a new limitation about the work gain from the engine by analyzing the entropy change and quantum mutual information change during the process. In addition and remarkably, by combination of two independent engines and with the help of the entropic uncertainty relation with quantum memory, we find that the total maximum work gained from those two heat engines should be larger than a quantity related with quantum entanglement between the ancillary state and the quantum memory. This result provides a lower bound for the maximum work extracted, in contrast with the upper bound in the conventional second law of thermodynamics. However, the validity of this inequality depends on whether the maximum work can achieve the upper bound.

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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