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International Journal of Theoretical Physics

Classification of Separable States for Tripartite Qudits via Bell Inequalities

Chen Xie, Hui Zhao, Zhi‐Xi Wang

Published Nov 23, 2012• 1 citation
Publisher
DOI
10.1007/s10773-012-1425-y

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We strengthen the set of Bell-type inequalities presented by Sun and Fei [Phys. Rev. A 74, 032335 (2006)] that give a classification for biseparable correlations and entanglement in tripartite quantum systems. We will furthermore consider the restriction to local orthogonal spin observables and show that this strengthens all previously known such tripartite inequalities. The quadratic inequalities we find indicate a type of monogamy of maximal biseparable tripartite quantum correlations, although the nonmaximal ones can be shared. This is contrasted to recently found monogamy inequalities for bipartite Bell correlations in tripartite systems.