Distillability and partial transposition in bipartite systems
W. Dür, J. I. Cirac, M. Lewenstein, D. Bruss
Abstract
We study the distillability of a certain class of bipartite density operators which can be obtained via depolarization starting from an arbitrary one. Our results suggest that non-positivity of the partial transpose of a density operator is not a sufficient condition for distillability, when the dimension of both subsystems is higher than two.
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