Majewski, W.A.2016-03-012016-03-012014Majewski, W.A. 2014. On positive maps in quantum information. Russian journal of mathematical physics, 21(3):363-372. [http://link.springer.com/journal/11503#AboutSection]1061-92081555-6638 (Online)http://hdl.handle.net/10394/16482Using 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 presentedenArticle