Qubit Entanglement Breaking Channels
Quantum Physics
2009-11-10 v3 Mathematical Physics
math.MP
Abstract
This paper continues the study of stochastic maps, or channels, which break entanglement. We give a detailed description of entanglement-breaking qubit channels, and show that such maps are precisely the convex hull of those known as classical-quantum channels. We also review the complete positivity conditions in a canonical parameterization and show how they lead to entanglement-breaking conditions.
Cite
@article{arxiv.quant-ph/0302032,
title = {Qubit Entanglement Breaking Channels},
author = {Mary Beth Ruskai},
journal= {arXiv preprint arXiv:quant-ph/0302032},
year = {2009}
}
Comments
Contains main results from section 2 of quant-ph/0207100 Version 2 corrects minor typos. Final version to appear in Rev. Math. Phys