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Characterization of four-qubit states via Bell inequalities

A set of Bell inequalities classifying the quantum entanglement of four-qubit states is presented. These inequalities involve only two measurement settings per observer and can characterize fully separable, bi-separable and tri-separable quantum states. In addition, a quadratic inequality of the Bell operators for four-qubit systems is derived.

preprint2013arXivOpen access
Hui ZhaoXing-Hua ZhangShao-Ming FeiZhi-Xi Wang
quant-ph
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Open access4 authors1 topic
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Hui ZhaoXing-Hua ZhangShao-Ming FeiZhi-Xi Wang

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