We propose a ground state cooling scheme for an optomechanical resonator based on the system of a V-type three-level QD ensemble trapped in a two-mode cavity. The two-mode cavity was pumped by two different deriving fields. We studied the optomechanical cooling under the highly unresolved-sideband and beyond Lamb-Dicke regime (coupling strength between the cavity field and the phonon field not far less than the vibrational frequency). Our results show that the noise spectrum appeared a single peak when the detuning of the QD’s high excitation state and high-frequency driving field equals that of the QD’s low excitation state and low-frequency driving field, otherwise, then appeared double peaks. In the case of double peaks, we can realize the transition between optomechanical cooling and heating by changing the coupling strength of QD with cavity field, which is not available in the case of a single peak. We also studied the evolution of the mean phonon number with time, which i...

中文翻译：

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具有三能级量子点的混合光机系统中微机振荡器的冷却

我们提出了一种光机电谐振器的基态冷却方案，该方案基于陷在双模腔中的V型三能级QD集成系统。双模腔由两个不同的派生场泵浦。我们研究了在高度未解析边带和Lamb-Dicke体制之外的光机械冷却（腔场和声子场之间的耦合强度不小于振动频率）。我们的结果表明，当QD的高激发态和高频驱动场的失谐等于QD的低激发态和低频驱动场的噪声谱时，噪声频谱出现一个单峰，否则出现双峰。如果是双峰，我们可以通过改变QD与腔场的耦合强度来实现光机冷却与加热之间的转换，这在单峰情况下是不可用的。我们还研究了平均声子数随时间的演变，即...