Qubit Entanglement Breaking Channels

Details Qubit Entanglement Breaking Channels Qubit Entanglement Breaking Channels

2003-02-04

arxiv.org/abs/quant-ph/0302032v3

Rev. Math. Phys. 15, 643-662 (2003)

Physics

Quantum Physics

Contains main results from section 2 of quant-ph/0207100 Version 2 corrects minor typos. Final version to appear in Rev. Math.

Scientific paper

10.1142/S0129055X03001710

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.

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