Thermodynamics of quantum-jump-conditioned feedback control.
Thermodynamics of quantum-jump-conditioned feedback control.
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DOI：
10.1103/physreve.88.062107
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发表时间：
2013-05
期刊：
影响因子：
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通讯作者：
P. Strasberg;G. Schaller;T. Brandes;M. Esposito
中科院分区：
文献类型：
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作者：
P. Strasberg;G. Schaller;T. Brandes;M. Esposito
我们考虑开放的量子系统弱耦合到热库，并受到量子反馈操作触发或没有延迟监测量子跳跃。我们建立了这样的系统的热力学描述，并分析了如何修改热力学第一和第二定律的反馈。我们应用我们的形式主义来研究量子比特的效率进行量子反馈控制和操作作为两个水库之间的热泵。我们还证明了量子反馈可以用来稳定非平衡定态中的相干态，在某些情况下甚至可以成为纯量子态。
We consider open quantum systems weakly coupled to thermal reservoirs and subjected to quantum feedback operations triggered with or without delay by monitored quantum jumps. We establish a thermodynamic description of such systems and analyze how the first and second law of thermodynamics are modified by the feedback. We apply our formalism to study the efficiency of a qubit subjected to a quantum feedback control and operating as a heat pump between two reservoirs. We also demonstrate that quantum feedbacks can be used to stabilize coherences in nonequilibrium stationary states which in some cases may even become pure quantum states.