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Maximal Violation of Bell Inequality for Any Given Two-Qubit Pure State |
| XIANG Yang
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| School of Physics and Electronics, Henan University, Kaifeng 475004 |
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| Cite this article: |
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XIANG Yang 2010 Chin. Phys. Lett. 27 120301 |
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Abstract In the case of bipartite two-qubit systems, we derive an analytical expression of bound Bell operator for any given pure state. Our result not only manifests some properties of Bell inequality, for example, which may be violated by any pure entangled state and only be maximally violated for a maximally entangled state, but also gives the explicit values of maximal violation for any pure state. Finally we point out that any mixed states which can produce maximal violation of Bell inequality must have a maximal concurrence value.
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| Keywords:
03.65.Ud
03.65.Ta
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Received: 13 August 2010
Published: 23 November 2010
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| PACS: |
03.65.Ud
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(Entanglement and quantum nonlocality)
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03.65.Ta
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(Foundations of quantum mechanics; measurement theory)
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