Continuous multipartite entangled state in Wigner representation and violation of the Żukowski-Brukner inequality
Wu, C. Chen, J.-L. Kwek, L.C. Oh, C.H. Xue, K.
Xue, K.
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Abstract
We construct an explicit Wigner function for the N -mode squeezed state. Based on a previous observation that the Wigner function describes correlations in the joint measurement of the phase-space displaced parity operator, we investigate the nonlocality of the multipartite entangled state by the violation of the Żukowski-Brukner N -qubit Bell inequality. We find that quantum predictions for such a squeezed state violate these inequalities by an amount that grows with the number N. © 2005 The American Physical Society.
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Physical Review A - Atomic, Molecular, and Optical Physics
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Date
2005-02-01
DOI
10.1103/PhysRevA.71.022110
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Article