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
Rok vydání: 2020
Předmět:
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