Optomechanical Bell test

Photons of a laser beam driving the upper motional sideband of an optomechanical cavity can decay into photon-phonon pairs by means of an optomechanical parametric process. The phononic state can subsequently be mapped to a photonic state by exciting the lower sideband, hence creating photon-photon...

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Bibliographic Details
Published in:arXiv.org 2015-06
Main Authors: V Caprara Vivoli, Barnea, T, Galland, C, Sangouard, N
Format: Article
Language:English
Subjects:
Bell's inequality
Laser beams
Measuring instruments
Opto-mechanics
Photonics
Photons
Online Access:Get full text
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Summary:Photons of a laser beam driving the upper motional sideband of an optomechanical cavity can decay into photon-phonon pairs by means of an optomechanical parametric process. The phononic state can subsequently be mapped to a photonic state by exciting the lower sideband, hence creating photon-photon pairs out of an optomechanical system. We here demonstrate that these pairs can violate a Bell inequality when they are measured with photon counting techniques preceded by small displacement operations in the phase space. Our results show how to detect non-local light-mechanical correlations and open the way for device-independent quantum optomechanics where non-classical light-mechanical correlations can be certified without assumptions on the state structure or on the measurement devices.
ISSN:2331-8422
DOI:10.48550/arxiv.1506.06116