Violation of Bell's Inequality Using Continuous Variable Measurements
Date
2018
Authors
Thearle, Oliver
Janousek, Jiri
Armstrong, Seiji
Hosseini, Sara
Schünemann, Melaine
Assad, Syed
Symul, Thomas
James, Matthew
Huntington, Elanor
Ralph, Timothy Cameron
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Volume Title
Publisher
American Physical Society
Abstract
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 Bell’s 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±0.02. This opens new possibilities for using continuous variable states for device independent quantum protocols.
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Source
Physical Review Letters
Type
Journal article
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Access Statement
Open Access