Violation of Bells inequality using continuous variable measurements

A Bell inequality is a fundamental test to rule out local hidden variable model descriptions of correlations between two physically separated systems. There have been a number of experiments in which a Bell inequality has been violated using discrete-variable systems. We demonstrate a violation of B...

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Bibliographic Details
Published in:arXiv.org 2018-01
Main Authors: Thearle, Oliver, Janousek, Jiri, Armstrong, Seiji, Hosseini, Sara, Schünemann, Melanie, Assad, Syed, Symul, Thomas, James, Matthew R, Huntington, Elanor, Ralph, Timothy C, Ping Koy Lam
Format: Article
Language:English
Subjects:
Bell's inequality
Continuity (mathematics)
Entangled states
Quadratures
Online Access:Get full text
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Summary:A Bell inequality is a fundamental test to rule out local hidden variable model descriptions of correlations between two physically separated systems. There have been a number of experiments in which a Bell inequality has been violated using discrete-variable systems. We demonstrate a violation of Bells inequality using continuous variable quadrature measurements. By creating a four-mode entangled state with homodyne detection, we recorded a clear violation with a Bell value of \(B = 2.31 \pm 0.02\). This opens new possibilities for using continuous variable states for device independent quantum protocols.
ISSN:2331-8422
DOI:10.48550/arxiv.1801.03194