Bipartite entanglement measure based on covariances

Details Bipartite entanglement measure based on covariances Bipartite entanglement measure based on covariances

2007-03-27

arxiv.org/abs/quant-ph/0703249v3

Phys. Rev. A 75, 062317 (2007)

Physics

Quantum Physics

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Scientific paper

We propose an entanglement measure for two qudits based on the covariances of a set of generators of the su(N) algebra. In particular, we represent this measure in terms of the mutually unbiased projectors for N prime. For pure states this measure quantify entanglement, we obtain an explicit expression which relates it to the concurrence hierarchy, specifically the I-concurrence and the 3-concurrence. For mixed states we propose a separability criterion.

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