Exposed positive maps: a sufficient condition
Quantum Physics
2012-03-05 v2 Mathematical Physics
math.MP
Abstract
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 analog of a spanning property which guaranties that a positive map is optimal. We analyze a class of decomposable maps for which this condition is also necessary.
Keywords
Cite
@article{arxiv.1111.2012,
title = {Exposed positive maps: a sufficient condition},
author = {Dariusz Chruściński and Gniewomir Sarbicki},
journal= {arXiv preprint arXiv:1111.2012},
year = {2012}
}
Comments
10 pages; improved version