An external coherent phase-locking drive opens a gap in the dispersion of collective excitations in a driven-dissipative condensate and reveals regions of finite-wavevector dynamical instability in the phase diagram.
This requires taking the logarithm (12) of the eigenvalues of the linearized propagatorU(T) for small perturbations around the limit cycle
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Opening a gap in the dispersion of the collective excitations of a driven-dissipative condensate subject to an external coherent drive
An external coherent phase-locking drive opens a gap in the dispersion of collective excitations in a driven-dissipative condensate and reveals regions of finite-wavevector dynamical instability in the phase diagram.