Wigner表象下的连续多体纠缠态及对Zukowski-Brukner不等式的破坏
Continuous Multipartite Entangled State in Wigner Representation and the Violation of Zukowski-Brukner Inequality
摘要：
构造了N模压缩态的显式Wigner函数。基于Wigner函数描述了相空间位移宇称算符联合测量中的关联性，利用Zukowski-Brukner N量子比特贝尔不等式的破坏，研究了多体纠缠态的非定域性.我们发现，这种压缩态的量子预言违反了这些不等式的数量，随着数量N的增长。
英文摘要：
We construct an explicit Wigner function for 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 non-locality of multipartite entangled state by the violation of Zukowski-Brukner N-qubit Bell inequality. We find that quantum predictions for such squeezed state violate these inequalities by an amount that grows with the number N.
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