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 Lab Nonlinear Spect LENS, Via Carrara 1, I-50019 Sesto Fiorentino, FI, Italy; CNR, INO, Largo Enrico Fermi 6, I-50125 Florence, Italy; Inst Mat Elect & Magnetism, Nanosci Trento FBK Div, I-38123 Povo, Trento, Italy; Ist Nazl Fis Nucl, Trento Inst Fundamental Phys & Applicat, I-38123 Povo, Trento, Italy; Ist Nazl Fis Nucl, Sez Firenze, Via Sansone 1, Sesto Fiorentino, FI, Italy; Delft Univ Technol, DIMES, ECTM, Dept Microelect & Comp Engn, Feldmanweg 17, NL-2628 CT Delft, Netherlands; Univ Trento, Dipartimento Matemat, I-38123 Povo, Trento, Italy; Univ Firenze, Dipartimento Fis & Astron, 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.

Journal/Review: PHYSICAL REVIEW A

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

More Information: Research was performed within the Project QuaSeRT funded by the QuantERA ERA-NET Cofund in Quantum Technologies implemented within the European Union´s Horizon 2020 Programme. The research has been partially supported by INFN (HUMOR project).
KeyWords: Cavity Optomechanics, Quantum Optics
DOI: 10.1103/PhysRevA.102.053505

Citations: 8
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