We propose the dynamical stabilization of a nonequilibrium order in a driven dissipative system comprised an atomic Bose-Einstein condensate inside a high finesse optical cavity, pumped with an optical standing wave operating in the regime of anomalous dispersion. When the amplitude of the pump field is modulated close to twice the characteristic limit-cycle frequency of the unmodulated system, a stable subharmonic response is found. The dynamical phase diagram shows that this subharmonic response occurs in a region expanded with respect to that where stable limit-cycle dynamics occurs for the unmodulated system. In turning on the modulation we tune the atom-cavity system from a continuous to a discrete time crystal.

中文翻译：

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耗散原子-腔系统中从连续到离散的时间晶体

我们建议在驱动耗散系统中实现非平衡阶的动态稳定，该系统包括高精细光学腔内的原子玻色 - 爱因斯坦凝聚，用在异常色散状态下工作的光学驻波泵浦。当泵浦场的振幅被调制到接近未调制系统特征极限循环频率的两倍时，就会发现稳定的次谐波响应。动态相图显示该次谐波响应发生在相对于未调制系统出现稳定极限循环动态的区域扩展的区域中。在打开调制时，我​​们将原子-腔系统从连续时间晶体调整为离散时间晶体。