We report the observation of a time crystal comb in the continuously driven-dissipative and strongly interacting Rydberg thermal gas, in which continuous time crystal and discrete time crystal as well as the higher-order harmonic oscillation phases are observed in the same system by tuning the Rydberg excitation Rabi frequency. Remarkably, our work establishes the fundamental relation of time crystalline and driven-dissipative system, and provides new ways to explore the nonequilibrium phases of matter in open systems. Such time crystals with persistent oscillation rooted in emergent quantum correlations, may emerge as a ubiquitous tool in quantum metrology, for instance, continuous sensing and parameter estimation surpassing the standard quantum limit.
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Jiao et al. (2024) studied this question.
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