A Decomposition Theorem for Positive Maps, and the Projection Onto a Spin Factor

Authors

  • Erling Størmer

DOI:

https://doi.org/10.7146/math.scand.a-23300

Abstract

It is shown that each positive map between matrix algebras is the sum of a maximal decomposable map and an atomic map which is both optimal and co-optimal. The result is studied in detail for the projection onto a spin factor.

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Published

2016-03-07

Issue

Vol. 118 No. 1 (2016)

Section

Articles

How to Cite

[1]
E. Størmer, “A Decomposition Theorem for Positive Maps, and the Projection Onto a Spin Factor”, Math. Scand., vol. 118, no. 1, pp. 106–118, Mar. 2016, doi: 10.7146/math.scand.a-23300.