Genuine multipartite nonlocality of permutationally invariant Gaussian states

Xu, Buqing, Tufarelli, Tommaso and Adesso, Gerardo (2017) Genuine multipartite nonlocality of permutationally invariant Gaussian states. Physical Review A, 95 (1). 012124. ISSN 2469-9934

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We investigate genuine multipartite nonlocality of pure permutationally invariant multimode Gaussian states of continuous variable systems, as detected by the violation of Svetlichny inequality. We identify the phase space settings leading to the largest violation of the inequality when using displaced parity measurements, distinguishing our results between the cases of even and odd total number of modes. We further consider pseudospin measurements and show that, for three-mode states with asymptotically large squeezing degree, particular settings of these measurements allow one to approach the maximum violation of Svetlichny inequality allowed by quantum mechanics. This indicates that the strongest manifestation of genuine multipartite quantum nonlocality is in principle verifiable on Gaussian state.

Item Type: Article
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Mathematical Sciences
Identification Number:
Depositing User: Adesso, Gerardo
Date Deposited: 24 Feb 2017 10:55
Last Modified: 04 May 2020 18:30

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