Ergotropy from quantum and classical correlations

Ergotropy from quantum and classical correlations
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量子相关性和经典相关性的各向异性

DOI:
10.1088/1751-8121/ac3eba
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发表时间:
2021
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
通讯作者:
Deffner, Sebastian
Deffner, Sebastian
中科院分区:
--
文献类型:
--
作者:
Touil, Akram;Çakmak, Barış;Deffner, Sebastian

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量子相干性具有热力学价值已是不争的事实。自然的问题出现了,其他真正的量子特性,如纠缠,是否也可以用来提取热力学功。在目前的分析中,我们表明,各向异性可以表示为量子互信息的函数,这表明了从经典和量子关联的可提取的工作的贡献。更具体地说,我们分析了具有局部热态的二分量子系统,使得对各向异性的唯一贡献源于相关性。我们的研究结果说明了两个量子位系统集体耦合到一个热浴。
It is an established fact that quantum coherences have thermodynamic value. The natural question arises, whether other genuine quantum properties such as entanglement can also be exploited to extract thermodynamic work. In the present analysis, we show that the ergotropy can be expressed as a function of the quantum mutual information, which demonstrates the contributions to the extractable work from classical and quantum correlations. More specifically, we analyze bipartite quantum systems with locally thermal states, such that the only contribution to the ergotropy originates in the correlations. Our findings are illustrated for a two-qubit system collectively coupled to a thermal bath.
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