We report a previously unknown synchronization phenomenon, which is simulated with an optomechanical system driven by two equally strong fields with different frequencies. Once the frequencies of the driving fields are properly matched, the amplitude and phase of the mechanical oscillator coupled to the cavity field, together with its frequency spectrum, will be frozen on one of determined trajectories like energy levels, and the phenomenon exists for the drive intensity beyond a threshold. Interestingly, the mechanical motion can become highly sensitive to its initial condition and the perturbations during the beginning period of dynamical evolution but, unlike the aperiodicity in chaotic motion, it will nonetheless evolve to one of those fixed trajectories in the end. The scenario may find applications in detecting tiny changes in environment.

中文翻译：

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机械振动被两个光学驱动场冻结在离散的水平上

我们报告了一个以前未知的同步现象，该现象是由光机械系统模拟的，该光机械系统由两个具有不同频率的相同强度的场驱动。一旦驱动场的频率正确匹配，耦合到腔场的机械振荡器的振幅和相位及其频谱将被冻结在确定的轨迹之一（例如能级）上，驱动现象就存在了。强度超过阈值。有趣的是，机械运动可以在动态演化的开始阶段对其初始状态和扰动高度敏感，但与混沌运动的非周期性不同，机械运动最终仍将演化为这些固定轨迹之一。该方案可能会在检测环境的微小变化中找到应用。