Mechanical squeezing via parametric amplification and feedback control

ORAL

Abstract

We discuss the mechanical squeezing that can result from position measurement and feedback applied to a parametrically driven mechanical oscillator. If the parametric drive is optimally detuned from resonance, correlations between the quadratures of motion allow unlimited steady-state squeezing. This contrasts to a parametric drive alone, which is limited to 3dB of squeezing. Compared to back-action evasion, we demonstrate that the measurement strength, temperature and efficiency requirements for quantum squeezing are significantly relaxed.

*Supported by the Australian Research Council Centre of Excellence CE110001013 and Discovery Project DP0987146.

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Authors

  • Andrew Doherty

    • School of Physics, University of Sydney, NSW 2006
    • Centre for Engineered Quantum Systems, University of Sydney

  • A. Szorkovszky

    • Centre for Engineered Quantum Systems, The University of Queensland

  • G.I. Harris

    • Centre for Engineered Quantum Systems, The University of Queensland

  • W.P. Bowen

    • Centre for Engineered Quantum Systems, The University of Queensland