POSITIVE MAPS , STATES , ENTANGLEMENT AND ALL THAT ; some old and new problems

Abstract

We outline a new approach to the characterization as well as to the classification of positive maps. This approach is based on the facial structures of the set of states and of the cone of positive maps. In particular, the equivalence between Schroedinger’s and Heisenberg’s pictures is reviewed in this more general setting. Furthermore, we discuss in detail… (More)

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