Publication:
Continuous multipartite entangled state in Wigner representation and violation of the Zukowski-Brukner inequality

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2005
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American Physical Society
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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.
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Wu, C., Chen, J.-L., Kwek, L. C., Oh, C. H., & Xue, K. (2005). Continuous multipartite entangled state in Wigner representation and violation of the Żukowski-Brukner inequality. Physical Review A, 71(2), Article 022110. https://doi.org/10.1103/PhysRevA.71.022110
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