Levitated cavity optomechanics in high vacuum

Abstract

We report dispersive coupling of an optically trapped silica nanoparticle ($143$nm diameter) to the field of a driven Fabry-Perot cavity in high vacuum ($4.3\times 10^{-6}$mbar). We demonstrate nanometer-level control in positioning the particle with respect to the intensity distribution of the cavity field, which allows access to linear, quadratic and tertiary optomechanical interactions in the resolved sideband regime. We determine all relevant coupling rates of the system, i.e. mechanical and optical losses as well as optomechanical interaction, and obtain a quantum cooperativity of $C_Q=0.01$. Based on the presented performance the regime of strong cooperativity ($C_Q>1$) is clearly within reach by further decreasing the mode volume of the cavity.

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• Distribution of laser shot noise energy delivered to a levitated nanoparticle
• Detecting nonclassical correlations in levitated cavity optomechanics
• Stationary Gaussian Entanglement between Levitated Nanoparticles
• Quadratic optomechanical cooling of a cavity-levitated nanosphere
• A Quantum Heat Machine from Fast Optomechanics
• Constraining modified gravity with quantum optomechanics
• Optomechanical cooling with coherent and squeezed light: the thermodynamic cost of opening the heat valve
• Zero-dimensional models for gravitational and scalar QED decoherence
• Linear Ultrastrong Optomechanical Interaction
• Collective-motion-enhanced acceleration sensing via an optically levitated microsphere array
• Simultaneous ground-state cooling of two levitated nanoparticles by coherent scattering
• Coherent Scattering-mediated correlations between levitated nanospheres
• Dynamical tunnelling of a Nano-mechanical Oscillator
• Enhanced optomechanical coupling between an optically levitated particle and an ultrahigh Q optical microcavity
• Roto-translational optomechanics
• Dynamics within a tunable harmonic/quartic waveguide
• Quantum Physics in Space