Quantum nonlocality for two-mode correlated states based on generalized pseudospin operators

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• 作者：Bin Zhang^a ; ^{zhangbin220@yahoo.cn} ; Zhi-Rong Zhong^a ; Shi-Biao Zheng ; ^a ; ^{sbzheng@pub5.fz.fj.cn}
• 关键词：Entanglement ; Quantum nonlocality ; Continuous variable system ; Pseudospin operator
• 刊名：Physics Letters A
• 出版年：2011
• 出版时间：25 April 2011
• 年：2011
• 卷：375
• 期：17
• 页码：1765-1768
• 全文大小：227 K

文摘

In this Letter, we investigate the quantum nonlocality of two-mode correlated states. We find that the pseudospin formalism [Z.B. Chen, J.W. Pan, G. Hou, Y.D. Zhang, Phys. Rev. Lett. 88 (2002) 040406] generally fails to depict the nonlocality of the states when the photon number difference between the two modes is odd. The formalism is then generalized such that the nonlocality of a two-mode correlated state can be well revealed without regard to the difference. Later we consider the nonlocality of the two-mode intelligent SU(1,1) states in the generalized formalism and compare our results with the entanglement of the corresponding states.