非晶材料中强耦合缺陷的量子热阀和热二极管
Quantum heat valve and diode of strongly coupled defects in amorphous material
AI总结：
本研究利用两个耦合二能级原子，通过机械应变控制实现量子热阀和热二极管功能，发现宽电压范围和温度差下可实现高性能整流，非对称耦合增强热输运，为量子热机设计提供新途径。
摘要：
机械应变可以控制非晶材料中二能级原子的频率。在本工作中，我们利用两个耦合的二能级原子，通过控制机械应变来操纵热输运的大小和方向，以实现热开关和热阀的功能。研究发现，在较宽的压电电压范围内和不同温度下，可以实现高性能的热二极管。我们还讨论了整流因子对温度和热库耦合的依赖性。我们发现，较大的温度差对应较大的整流效应。非对称的系统-库耦合强度可以增强热输运的大小，且非对称和对称耦合强度对热二极管性能的影响是互补的。这可能为调制和控制热输运的大小和流动偏好提供一种有效的方法。这项工作可能为设计和调节量子热机提供见解。
英文摘要：
The mechanical strain can control the frequency of two-level atoms in amorphous material. In this work, we would like to employ two coupled two-level atoms to manipulate the magnitude and direction of heat transport by controlling mechanical strain to realize the function of a thermal switch and valve. It is found that a high-performance heat diode can be realized in the wide Piezo voltage range at different temperatures. We also discuss the dependence of the rectification factor on temperatures and couplings of heat reservoirs. We find that the higher temperature differences correspond to the larger rectification effect. The asymmetry system-reservoir coupling strength can enhance the magnitude of heat transfer, and the impact of asymmetric and symmetric coupling strength on the performance of the heat diode is complementary. It may provide an efficient way to modulate and control heat transport's magnitude and flow preference. This work may give insight into designing and tuning quantum heat machines.
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