A single driven quantum Van der Pol oscillator is not a dissipative time crystal: dephasing or a Kerr term opens the Liouvillian gap and kills persistent oscillations.
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Comment on "Time Crystal in a Single-mode Nonlinear Cavity"
A single driven quantum Van der Pol oscillator is not a dissipative time crystal: dephasing or a Kerr term opens the Liouvillian gap and kills persistent oscillations.