On positive maps in quantum information |
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Authors: | W. A. Majewski |
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Affiliation: | 1. Institute of Theoretical Physics and Astrophysics, Gdańsk University, Wita Stwosza 57, 80-952, Gdańsk, Poland 2. Unit for BMI, North-West-University, Potchefstroom, South Africa
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Abstract: | Using the Grothendieck approach to the tensor product of locally convex spaces, we review a characterization of positive maps as well as Belavkin-Ohya characterization of PPT states. Moreover, within this scheme, a generalization of the idea of Choi matrices for genuine quantum systems will be presented. |
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