Quantum coherence is one of the most intriguing applications of quantummechanics, and has led to interesting phenomena and uncommon results. Here weshow that in a stark contrast to the usual red-detuned condition to observebistability in single-mode optomechanics, the optical intensities exhibitbistability for all values of cavity-laser detuning due to intermode couplinginduced by the two-photon coherence. Interestingly, an unconventionalbistability with "ribbon"-shaped hysteresis can be observed for blue-detunedlaser frequencies. We also demonstrate that the two-photon coherence leads to astrong entanglement between the movable mirrors in the adiabatic regime.Surprisingly, the mirror-mirror entanglement is shown to persist forenvironment temperature of the phonon bath up to 12 K using experimentalparameters.
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机译：量子相干是量子力学最引人入胜的应用之一，并已引起有趣的现象和罕见的结果。在这里，我们显示出与通常的红色失谐条件在单模光力学中观察双稳性形成了鲜明的对比，由于双光子相干引起的模间耦合，光强度对于腔-激光失谐的所有值均表现出双稳性。有趣的是，对于蓝色失谐激光频率，可以观察到具有“丝带”形滞后的非常规双稳态。我们还证明，在绝热状态下，双光子相干会导致可移动反射镜之间发生强烈的纠缠。令人惊讶的是，使用实验参数表明，反射镜与镜子之间的纠缠在声子浴的环境温度下可持续高达12 K.
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