Exposed positive maps: a sufficient condition
2012 (English)In: Journal of Physics A: Mathematical and Theoretical, ISSN 1751-8113, Vol. 45, no 11, 115304- p.Article in journal (Refereed) Published
Exposed positive maps in matrix algebras define a dense subset of extremal maps. We provide a sufficient condition for a positive map to be exposed. This is an analogue of a spanning property which guarantees that a positive map is optimal. We analyze a class of decomposable maps for which this condition is also necessary.
Place, publisher, year, edition, pages
2012. Vol. 45, no 11, 115304- p.
IdentifiersURN: urn:nbn:se:su:diva-76118DOI: 10.1088/1751-8113/45/11/115304ISI: 000301353200016OAI: oai:DiVA.org:su-76118DiVA: diva2:526201