Estimation of concurrence for multipartite mixed states
Department of Mathematics, Capital Normal University, Beijing, 100037, PR China
2 Max-Planck-Institute for Mathematics in the Sciences, 04103 Leipzig, Germany
We investigate the lower bound of concurrence for multipartite quantum mixed states. Analytical lower bounds are derived for some multipartite systems, by establishing functional relations between concurrence and the generalized partial transpositions.
© EDP Sciences, Springer-Verlag, 2008