Nonlinear feedback condenses energy into the lowest-frequency mode of multimode mechanical resonators, producing ring-shaped phase-space distributions, amplitude squeezing, and order-of-magnitude linewidth narrowing.
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Phonon condensation and cooling via nonlinear feedback
Nonlinear feedback condenses energy into the lowest-frequency mode of multimode mechanical resonators, producing ring-shaped phase-space distributions, amplitude squeezing, and order-of-magnitude linewidth narrowing.