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Research in Optical Sciences

Quantum feedback control of mechanical squeezing

Marco G. Genoni, Matteo Bina, Stefano Olivares, Gabriele De Chiara, Mauro Paternostro

Published Jan 1, 2014• 0 citations
Publisher

Abstract

A simple feedback protocol able to generate steady-state squeezing of a mechanical oscillator is presented. The protocol is based on frequent repeated measurements and reinitialisation of a two-level system interacting with the mechanical oscillator itself.
DOI
10.1364/qim.2014.qw1b.4

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We propose a feedback control mechanism for the squeezing of the phononic mode of a mechanical oscillator. We show how, under appropriate working conditions, a simple adiabatic approach is able to induce mechanical squeezing. We then go beyond the limitations of such a working point and demonstrate the stationary squeezing induced by using repeated measurements and reinitialization of the state of a two-level system ancilla coupled to the oscillator. Our nonadaptive feedback loop offers interesting possibilities for quantum state engineering and steering in open-system scenarios.
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