具有动态耦合的混合量子热机
Hybrid quantum thermal machines with dynamical couplings
摘要：
量子热机可以执行有用的任务，例如提供电力，冷却或加热。在这项工作中，我们考虑混合热机，可以同时执行多个任务。我们的特点，并找到最佳的工作条件为三端量子热机，其中的工作介质是量子谐振子，耦合到三个热浴，与两个耦合驱动周期性的时间。我们表明，它是可以有效地操作的热机，在纯和混合模式，并简单地通过改变驱动频率在不同的操作模式之间切换。此外，所提出的设置也可以用作高性能晶体管，在输出到输入信号和差分增益方面。由于其多功能性和可调性，我们的模型可能对工程热力学任务和量子技术中的热管理感兴趣。
英文摘要：
Quantum thermal machines can perform useful tasks, such as delivering power, cooling, or heating. In this work, we consider hybrid thermal machines, that can execute more than one task simultaneously. We characterize and find optimal working conditions for a three-terminal quantum thermal machine, where the working medium is a quantum harmonic oscillator, coupled to three heat baths, with two of the couplings driven periodically in time. We show that it is possible to operate the thermal machine efficiently, in both pure and hybrid modes, and to switch between different operational modes simply by changing the driving frequency. Moreover, the proposed setup can also be used as a high-performance transistor, in terms of output--to--input signal and differential gain. Due to its versatility and tunability, our model may be of interest for engineering thermodynamic tasks and for thermal management in quantum technologies.
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