Strengthened Bell inequalities for orthogonal spin directions |
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Authors: | Jos Uffink |
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Affiliation: | Institute for History and Foundations of Science, Utrecht University, PO Box 80.000, 3508 TA Utrecht, The Netherlands |
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Abstract: | We provide bounds on correlations of locally orthogonal observables in two-qubit separable states. These bounds strengthen the Bell inequality and improve upon some alternative entanglement criteria. They provide necessary and sufficient criteria for separability of pure states and test the correlations allowed by local hidden variable models against those allowed by separable quantum states. |
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Keywords: | 03.65.Ud 03.67.Mn 03.65.Ta |
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