Efficiency at maximum power of a quantum heat engine based on two coupled oscillators
Efficiency at maximum power of a quantum heat engine based on two coupled oscillators
复制标题
基于两个耦合振荡器的量子热机最大功率下的效率
DOI：
10.1103/physreve.91.062134
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发表时间：
2015
影响因子：
2.4
通讯作者：
He Jizhou
中科院分区：
文献类型：
--
作者：
Wang Jianhui;Ye Zhuolin;Lai Yiming;Li Weisheng;He Jizhou
We propose and theoretically investigate a system of two coupled harmonic oscillators as a heat engine. We show how these two coupled oscillators within undamped regime can be controlled to realize an Otto cycle that consists of two adiabatic and two isochoric processes. During the two isochores the harmonic system is embedded in two heat reservoirs at constant temperaturesand, respectively, and it is tuned slowly along a protocol to realize an adiabatic process. To illustrate the performance in finite time of the quantum heat engine, we adopt the semigroup approach to model the thermal relaxation dynamics along the two isochoric processes, and we find the upper bound of efficiency at maximum power (EMP)to be a function of the Carnot efficiency:, identical to those previously derived from ideal (noninteracting) microscopic, mesoscopic, and macroscopic systems.
