期刊
PHYSICS LETTERS A
卷 372, 期 8, 页码 1205-1212出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2007.09.033
关键词
separability; Bell inequality; entanglement detection; orthogonal observables; local realism
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. (C) 2007 Elsevier B.V. All rights reserved.
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