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Bell Inequalities Classifying Bi-separable Three-qubit States
Bao-Zhi Sun and Shao-Ming Fei
We present a set of Bell inequalities that gives rise to a finer classification of the entanglement for tripartite systems. These inequalities distinguish three possible bi-separable entanglements for three-qubit states. The three Bell operators we employed constitute an external sphere of the separable cube.