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arXiv 1402.6746quant-ph
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量子光机热机

Quantum Optomechanical Heat Engine

Keye Zhang, Francesco Bariani, Pierre Meystre

摘要:

本文从理论上研究了热机的量子光学力学实现。在一般的光机布置中,腔场和振荡端镜之间的光机耦合导致极化激元正常模式激发,其特征取决于泵浦失谐和耦合强度。通过改变失谐,可以将它们的特性从类声子转变为类光子,使得它们分别主要耦合到声子或光子的热库。我们利用这两个水库的有效温度不同的事实,产生一个奥托循环沿极化激元分支之一。我们讨论了系统的基本性质在两个不同的制度:在光域中,它是可能的提取工作的机械谐振器在有限的温度下的热能,而在微波范围内,原则上可以利用周期提取工作的黑体辐射背景耦合到一个超冷原子系综。

英文摘要:

We investigate theoretically a quantum optomechanical realization of a heat engine. In a generic optomechanical arrangement the optomechanical coupling between the cavity field and the oscillating end-mirror results in polariton normal mode excitations whose character depends on the pump detuning and the coupling strength. By varying that detuning it is possible to transform their character from phonon-like to photon-like, so that they are predominantly coupled to the thermal reservoir of phonons or photons, respectively. We exploit the fact that the effective temperatures of these two reservoirs are different to produce a Otto cycle along one of the polariton branches. We discuss the basic properties of the system in two different regimes: in the optical domain it is possible to extract work from the thermal energy of a mechanical resonator at finite temperature, while in the microwave range one can in principle exploit the cycle to extract work from the blackbody radiation background coupled to an ultra-cold atomic ensemble.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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