Quantum Signature of a Squeezed Mechanical Oscillator
A. Chowdhury (Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche)
P. Vezio (European Laboratory for Non-linear Spectroscopy (LENS))
M. Bonaldi (Trento Institute for Fundamental Physics and Applications, Fondazione Bruno Kessler)
A. Borrielli (Fondazione Bruno Kessler, Trento Institute for Fundamental Physics and Applications)
F. Marino (Sezione di Firenze, Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche)
B. Morana (TU Delft - Electronic Components, Technology and Materials, Fondazione Bruno Kessler)
G. A. Prodi (Università degli Studi di Trento, Trento Institute for Fundamental Physics and Applications)
P. M. Sarro (TU Delft - Electronic Components, Technology and Materials)
E. Serra (TU Delft - Electronic Components, Technology and Materials, Trento Institute for Fundamental Physics and Applications)
F. Marin (Istituto Nazionale di Ottica, Consiglio Nazionale delle Ricerche, University of Florence, Istituto Nazionale di Fisica Nucleare - Sezione di Firenze, European Laboratory for Non-linear Spectroscopy (LENS))
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Abstract
Recent optomechanical experiments have observed nonclassical properties in macroscopic mechanical oscillators. A key indicator of such properties is the asymmetry in the strength of the motional sidebands produced in the probe electromagnetic field, which is originated by the noncommutativity between the oscillator ladder operators. Here we extend the analysis to a squeezed state of an oscillator embedded in an optical cavity, produced by the parametric effect originated by a suitable combination of optical fields. The motional sidebands assume a peculiar shape, related to the modified system dynamics, with asymmetric features revealing and quantifying the quantum component of the squeezed oscillator motion.