In the unresolved sideband regime, we propose a scheme for cooling mechanical resonator close to its ground state in a three-cavity optomechanical system, where the auxiliary cavities are indirectly connected with the mechanical resonator through standard optomechanical subsystem. The standard optomechanical subsystem is driven by a strong pump laser field. With the help of the auxiliary cavities, the heating process is suppressed and the cooling process of the mechanical resonator is enhanced. More importantly, the average phonon number is much less than 1 in a larger range. This means that the mechanical resonator can be cooled down to its ground state. All these interesting features will significantly promote the physical realization of quantum effects in multi-cavity optomechanical systems.

在未解决的边带状态下，我们提出了一种在三腔光机械系统中将机械谐振器冷却至接近其基态的方案，其中辅助腔通过标准光机械子系统与机械谐振器间接连接。标准光机械子系统由强泵浦激光场驱动。在辅助腔的帮助下，抑制了加热过程并增强了机械谐振器的冷却过程。更重要的是，在更大的范围内，平均声子数远小于 1。这意味着机械谐振器可以冷却到其基态。所有这些有趣的特性将显着促进多腔光机系统中量子效应的物理实现。