Considering two mixed mechanical resonators, we investigate two different kinds of quantum correlations, i.e., entanglement and quantum discord. We use two Fabry–Pérot cavities coupled by squeezed light. To quantify entanglement and quantum discord, we employ respectively the Gaussian intrinsic entanglement and the Gaussian Hellinger discord. We found that these two forms of quantum correlations decay under influence of thermal noise, while optomechanical coupling enhances them. In addition, the Gaussian Hellinger discord measured in separable states shows a resilient behavior against thermal effects than that measured in entangled states. Importantly, we show that when the Gaussian intrinsic entanglement vanishes, the Gaussian Hellinger discord remains almost constant, keeping a nonzero value even for high temperatures. Finally, based on a comparative study, we show that, in the adiabatic regime, the entanglement of the two considered modes is more robust than that in the nonadiabatic regime.

考虑两个混合机械谐振器，我们研究了两种不同的量子相关性，即纠缠和量子不和谐。我们使用两个被挤压的光耦合的法布里-珀罗腔。为了量化纠缠和量子不和，我们分别采用了高斯固有纠缠和高斯赫林格不和。我们发现，这两种形式的量子相关性在热噪声的影响下会衰减，而光机械耦合会增强它们。另外，在可分离状态下测得的高斯赫林格不和线比在纠缠态下测得的对热效应有弹性。重要的是，我们表明，当高斯内在纠缠消失时，高斯Hellinger不和谐几乎保持恒定，即使在高温下也保持非零值。最后，