Mechanical squeezing via unstable dynamics in a microcavity

• URL: http://arxiv.org/abs/2112.01144v2
• Date: Wed, 6 Apr 2022 15:23:40 GMT
• Title: Mechanical squeezing via unstable dynamics in a microcavity
• Authors: Katja Kustura and Carlos Gonzalez-Ballestero and Andr\'es de los R\'ios Sommer and Nadine Meyer and Romain Quidant and Oriol Romero-Isart
• Abstract summary: We show that strong mechanical quantum squeezing in a linear optomechanical system can be generated through the dynamical instability reached in the far red-detuned and ultrastrong coupling regime. We argue for its feasibility for the case of a levitated nanoparticles coupled to a microcavity via coherent scattering. Our results bring forth optical microcavities in the unresolved sideband regime as powerful mechanical squeezers for levitated nanoparticles, and hence as key tools for quantum-enhanced inertial and force sensing.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We theoretically show that strong mechanical quantum squeezing in a linear optomechanical system can be rapidly generated through the dynamical instability reached in the far red-detuned and ultrastrong coupling regime. We show that this mechanism, which harnesses unstable multimode quantum dynamics, is particularly suited to levitated optomechanics, and we argue for its feasibility for the case of a levitated nanoparticle coupled to a microcavity via coherent scattering. We predict that for sub-millimeter-sized cavities the particle motion, initially thermal and well above its ground state, becomes mechanically squeezed by tens of decibels on a microsecond timescale. Our results bring forth optical microcavities in the unresolved sideband regime as powerful mechanical squeezers for levitated nanoparticles, and hence as key tools for quantum-enhanced inertial and force sensing.

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