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Abstract: We present a necessary and sufficient condition for a finite dimensionaldensity matrix to be an extreme point of the convex set of density matriceswith positive partial transpose with respect to a subsystem. We also give analgorithm for finding such extreme points and illustrate this by some examples.



Autor: Jon Magne Leinaas, Jan Myrheim, Eirik Ovrum

Fuente: https://arxiv.org/







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