Quantum Signature of a Squeezed Mechanical Oscillator
Autor: | Francesco Marino, Enrico Serra, P. Vezio, A. Chowdhury, Pasqualina M. Sarro, Bruno Morana, Michele Bonaldi, G. A. Prodi, Antonio Borrielli, Francesco Marin |
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Rok vydání: | 2020 |
Předmět: |
Electromagnetic field
Physics Quantum optics Quantum Physics Oscillators (mechanical) media_common.quotation_subject FOS: Physical sciences Physics::Optics General Physics and Astronomy 01 natural sciences Asymmetry law.invention Ladder operator law Quantum mechanics Optical cavity 0103 physical sciences Quantum signature Quantum Physics (quant-ph) 010306 general physics Quantum Squeezed coherent state media_common Parametric statistics |
Zdroj: | Physical Review Letters, 124(2) Physical review letters 124 (2020): 023601-1. doi:10.1103/PhysRevLett.124.023601 info:cnr-pdr/source/autori:Chowdhury A.; Vezio P.; Bonaldi M.; Borrielli A.; Marino F.; Morana B.; Prodi G.A.; Sarro P.M.; Serra E.; Marin F./titolo:Quantum Signature of a Squeezed Mechanical Oscillator/doi:10.1103%2FPhysRevLett.124.023601/rivista:Physical review letters/anno:2020/pagina_da:023601-1/pagina_a:/intervallo_pagine:023601-1/volume:124 |
ISSN: | 1079-7114 0031-9007 |
Popis: | Some predictions of quantum mechanics are in contrast with the macroscopic realm of everyday experience, in particular those originated by the Heisenberg uncertainty principle, encoded in the non-commutativity of some measurable operators. Nonetheless, in the last decade opto-mechanical experiments have actualized macroscopic mechanical oscillators exhibiting such non-classical properties. A key indicator is the asymmetry in the strength of the motional sidebands generated in an electromagnetic field that measures interferometrically the oscillator position. This asymmetry is a footprint of the quantum motion of the oscillator, being originated by the non-commutativity between its ladder operators. A further step on the path highlighting the quantum physics of macroscopic systems is the realization of strongly non-classical states and the consequent observation of a distinct quantum behavior. Here we extend indeed the analysis to a squeezed state of a macroscopic mechanical oscillator embedded in an optical cavity, produced by 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. |
Databáze: | OpenAIRE |
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