A phase-modulated transverse pump in a cavity-BEC system is predicted to produce a rigid, tunable incommensurate time crystal, with the cavity photon number pulsing at a period set by the detuning from a parametric resonance.
Impossibility of Spontaneously Rotating Time Crys- tals: A No-Go Theorem,
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Time crystals in a shaken atom-cavity system
A phase-modulated transverse pump in a cavity-BEC system is predicted to produce a rigid, tunable incommensurate time crystal, with the cavity photon number pulsing at a period set by the detuning from a parametric resonance.