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Distillability via protocols respecting the positivity of partial transpose
T Eggeling1, K G Vollbrecht, R F Werner
1Institut für Mathematische Physik, TU Braunschweig, Mendelssohnstrasse 3, 38106 Braunschweig, Germany. T.Eggeling@tu-bs.de
Physical Review Letters
|December 12, 2001
Abstract:
We show that all quantum states that do not have a positive partial transpose are distillable via channels, which preserve the positivity of the partial transpose. The question whether bound entangled states with non-positive partial transpose exist is therefore closely related to the connection between the set of separable superoperators and positive partial transpose-preserving maps.