Positive linear maps of matrix algebras
Volume 98 / 2012
Banach Center Publications 98 (2012), 293-302
MSC: Primary 47B60; Secondary 81Q99, 46M05.
DOI: 10.4064/bc98-0-12
Abstract
A characterization of the structure of positive maps is presented. This sheds some more light on the old open problem studied both in Quantum Information and Operator Algebras. Our arguments are based on the concept of exposed points, links between tensor products and mapping spaces and convex analysis.
