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arXiv 1902.08790quant-ph
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利用三个量子比特的多功能量子热器件

Multifunctional quantum thermal device utilizing three qubits

Bao-qing Guo, Tong Liu, Chang-shui Yu

摘要:

量子热器件可以将热作为电子电流的电子模拟物,引起了人们越来越多的关注。在这里,三个耦合量子比特与三个不同温度的热浴相互作用,设计了一个三端量子热器件。从该系统的动力学求解的稳态行为的基础上,它表明,这样的设备集成了多个有趣的热力学功能。它可以作为一个热流晶体管,利用一端的微弱热流有效地放大通过另两端的电流,以连续调制它们在大幅度范围内,甚至打开/关闭热流。实验还发现,这三种电流对低温端的温度波动不敏感,因此它可以起到热稳定器的作用。此外,我们可以利用一个端子温度来理想地关闭任何一个端子处的热流,并允许热流通过其他两个端子,因此它可以用作热阀。最后,我们说明这种热装置可以控制热流的单向流动,因此它具有热整流器的功能。

英文摘要:

Quantum thermal devices which can manage heat as their electronic analogues for the electronic currents have attracted increasing attention. Here a three-terminal quantum thermal device is designed by three coupling qubits interacting with three heat baths with different temperatures. Based on the steady-state behavior solved from the dynamics of this system, it is demonstrated that such a device integrates multiple interesting thermodynamic functions. It can serve as a heat current transistor to use the weak heat current at one terminal to effectively amplify the currents through the other two terminals, to continuously modulate them ranging in a large amplitude, and even to switch on/off the heat currents. It is also found that the three currents are not sensitive to the fluctuation of the temperature at the low temperature terminal, so it can behave as a thermal stabilizer. In addition, we can utilize one terminal temperature to ideally turn off the heat current at any one terminal and to allow the heat currents through the other two terminals, so it can be used as a thermal valve. Finally, we illustrate that this thermal device can control the heat currents to flow unidirectionally, so it has the function as a thermal rectifier.

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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