We propose to exploit a continuous-variable measurement, based on displacing the input field at different points of the phase space, over a multiphoton state produced by a high-gain optical parametric amplifier. We show that by correlating the different values of the displaced parity operators obtained from the two separated parties, it is possible to violate a Bell's inequality and thus demonstrate the nonlocality of the overall state. The robustness of the results against two independent sources of error, loss and dephasing, is also discussed. © 2012 American Physical Society.

Continuous-variable nonlocality test performed over a multiphoton quantum state / Vitelli, Chiara; Marcelo Terra, Cunha; Spagnolo, Nicolo'; DE MARTINI, Francesco; Sciarrino, Fabio. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 85:1(2012), p. 012104. [10.1103/physreva.85.012104]

Continuous-variable nonlocality test performed over a multiphoton quantum state

VITELLI, Chiara;SPAGNOLO, NICOLO';DE MARTINI, Francesco;SCIARRINO, Fabio
2012

Abstract

We propose to exploit a continuous-variable measurement, based on displacing the input field at different points of the phase space, over a multiphoton state produced by a high-gain optical parametric amplifier. We show that by correlating the different values of the displaced parity operators obtained from the two separated parties, it is possible to violate a Bell's inequality and thus demonstrate the nonlocality of the overall state. The robustness of the results against two independent sources of error, loss and dephasing, is also discussed. © 2012 American Physical Society.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/434143
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