A lower bound of concurrence for multipartite quantum states

Details A lower bound of concurrence for multipartite quantum states A lower bound of concurrence for multipartite quantum states

2009-03-18

arxiv.org/abs/0903.3145v1

J. Phys. A: Math. Theor. 42 (2009) 145303

Physics

Quantum Physics

8 pages,no figure

Scientific paper

10.1088/1751-8113/42/14/145303

We study the concurrence of arbitrary multipartite mixed quantum states. An explicit lower bound of the concurrence is derived, which detects quantum entanglement of some states better than some separability criteria, and gives sufficient conditions for distilling GHZ states from tripartite states. An interesting relations between the lower bound of the concurrence for bipartite states and for tripartite states has been presented.

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