Classification and monogamy of three-qubit biseparable Bell correlations

Details Classification and monogamy of three-qubit biseparable Bell correlations Classification and monogamy of three-qubit biseparable Bell correlations

2007-02-27

arxiv.org/abs/quant-ph/0702257v2

Physical Review A, vol. 76, 012106 (2007)

Physics

Quantum Physics

Accepted final version for PRA. 6 pages

Scientific paper

10.1103/PhysRevA.76.012106

We strengthen the set of Bell-type inequalities presented by Sun & 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 three-particle quantum correlations, although the nonmaximal ones can be shared. This is contrasted to recently found monogamy inequalities for bipartite Bell correlations in tripartite systems.

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