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arXiv 1402.3787quant-ph
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腔光机系统的热力学循环

Thermodynamic cycle in a cavity optomechanical system

Hou Ian

摘要:

一个腔光机械系统是由腔场的辐射压力启动到充当量子谐振器的镜元件上。这种辐射压力在一定程度上可以控制反射镜的热力学特性,如冷却其有效温度。在这里,我们表明,通过适当地设计与量子系统相互作用的热浴的光谱密度,可以有效地打开和关闭量子系统的演化。在腔光学机械系统内,当热浴由镜的多模振荡器建模实现时,这种开-关效应转化为将热能注入或提取出腔场,从而促进四冲程热力学循环。

英文摘要:

A cavity optomechanical system is initiated by a radiation pressure of a cavity field onto a mirror element acting as a quantum resonator. This radiation pressure can control the thermodynamic character of the mirror to some extent, such as cooling its effective temperature. Here we show that by properly engineering the spectral density of a thermal heat bath that interacts with a quantum system, the evolution of the quantum system can be effectively turned on and off. Inside a cavity optomechanical system, when the heat bath is realized by a multi-mode oscillator modeling of the mirror, this on-off effect translates to infusion or extraction of heat energy in and out of the cavity field, facilitating a four-stroke thermodynamic cycle.

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