We address the nonlocality of fully inseparable three-mode Gaussian states generated either by bilinear three-mode Hamiltonians or by a sequence of bilinear two-mode Hamiltonians. Two different tests revealing nonlocality are considered, in which thedichotomic Bell operator is represented by the displaced parity andbythe pseudospin operator respectively. Three-mode states arealso considered as a conditional source of two-mode non-Gaussian states,whose nonlocality properties are analysed. We found that the non-Gaussian character of the conditional states allows violation of Bell’s inequalities (by parity and pseudospin tests) stronger than with a conventional twin-beam state. However, the non-Gaussian character is not sufficienttoreveal nonlocality through a dichotomized quadrature measurement strategy.
Nonlocality of two- and three-mode continuous variable systems / Alessandro Ferraro, Matteo G. A. Paris. - In: JOURNAL OF OPTICS. - ISSN 1464-4266. - 7:6(2005), pp. 174-182.
Nonlocality of two- and three-mode continuous variable systems
Alessandro Ferraro;Matteo G. A. Paris
2005
Abstract
We address the nonlocality of fully inseparable three-mode Gaussian states generated either by bilinear three-mode Hamiltonians or by a sequence of bilinear two-mode Hamiltonians. Two different tests revealing nonlocality are considered, in which thedichotomic Bell operator is represented by the displaced parity andbythe pseudospin operator respectively. Three-mode states arealso considered as a conditional source of two-mode non-Gaussian states,whose nonlocality properties are analysed. We found that the non-Gaussian character of the conditional states allows violation of Bell’s inequalities (by parity and pseudospin tests) stronger than with a conventional twin-beam state. However, the non-Gaussian character is not sufficienttoreveal nonlocality through a dichotomized quadrature measurement strategy.Pubblicazioni consigliate
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