Quantum motion of a squeezed mechanical oscillator attained via an optomechanical experiment

Year: 2020

Authors: Vezio P., Chowdhury A., Bonaldi M., Borrielli A., Marino F., Morana B., Prodi G. A., Sarro P. M., Serra E., Marin F.

Autors Affiliation: European Laboratory for Non-linear Spectroscopy (LENS), Via Carrara 1, I-50019 Sesto Fiorentino (FI), Italy; CNR-INO, Largo Enrico Fermi 6, I-50125 Firenze, Italy; Institute of Materials for Electronics and Magnetism, Nanoscience-Trento-FBK Division, 38123 Povo, Trento, Italy; Istituto Nazionale di Fisica Nucleare (INFN), Trento Institute for Fundamental Physics and Application, I-38123 Povo, Trento, Italy; INFN, Sezione di Firenze, Via Sansone 1, I-50019, Sesto Fiorentino (FI), Italy; Department of Microelectronics and Computer Engineering /ECTM/DIMES, Delft University of Technology, Feldmanweg 17, 2628 CT Delft, The Netherlands; Dipartimento di Matematica, Università di Trento, I-38123 Povo, Trento, Italy; Dipartimento di Fisica e Astronomia, Università di Firenze, Via Sansone 1, I-50019 Sesto Fiorentino (FI), Italy.

Abstract: We experimentally investigate a mechanical squeezed state realized in a parametrically modulated membrane resonator embedded in an optical cavity. We demonstrate that a quantum characteristic of the squeezed dynamics can be revealed and quantified even in a moderately warm oscillator, through the analysis of motional sidebands. We provide a theoretical framework for quantitatively interpreting the observations and present an extended comparison with the experiment. A notable result is that the spectral shape of each motional sideband provides a clear signature of a quantum mechanical squeezed state without the necessity of absolute calibrations, in particular in the regime where residual fluctuations in the squeezed quadrature are reduced below the zero-point level.


Volume: 102 (5)      Pages from: 053505-1  to: 053505-10

KeyWords: Cavity Optomechanics, Quantum Optics
DOI: 10.1103/PhysRevA.102.053505

Citations: 6
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