Constructing optimal entanglement witnesses. II
Quantum Physics
2013-05-29 v1 Mathematical Physics
math.MP
Abstract
We provide a class of optimal nondecomposable entanglement witnesses for 4N x 4N composite quantum systems or, equivalently, a new construction of nondecomposable positive maps in the algebra of 4N x 4N complex matrices. This construction provides natural generalization of the Robertson map. It is shown that their structural physical approximations give rise to entanglement breaking channels.
Cite
@article{arxiv.1006.3059,
title = {Constructing optimal entanglement witnesses. II},
author = {Dariusz Chruscinski and Justyna Pytel},
journal= {arXiv preprint arXiv:1006.3059},
year = {2013}
}
Comments
6 pages