点击次数：

论文类型：期刊论文

发表时间：2019-03-08

发表刊物：PHYSICAL REVIEW E

收录刊物：PubMed、SCIE、EI

卷号：99

期号：3

页面范围：032112

ISSN号：2470-0045

关键字：Qubits, Electronic current; Large amplitude; Low temperatures; Steady-state behaviors; Thermal devices; Thermal stabilizers; Thermal valves; Thermodynamic functions, Temperature

摘要：Quantum thermal devices which can manage heat as their electronic analogs 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 or 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 of a thermal rectifier.