Extending additivity from symmetric to asymmetric channels
Quantum Physics
2009-11-11 v4
Abstract
We prove a lemma which allows one to extend results about the additivity of the minimal output entropy from highly symmetric channels to a much larger class. A similar result holds for the maximal output -norm. Examples are given showing its use in a variety of situations. In particular, we prove the additivity and the multiplicativity for the shifted depolarising channel.
Cite
@article{arxiv.quant-ph/0505022,
title = {Extending additivity from symmetric to asymmetric channels},
author = {Motohisa Fukuda},
journal= {arXiv preprint arXiv:quant-ph/0505022},
year = {2009}
}
Comments
8 pages. This is the latest version of the first half of the original paper. The other half will appear in another paper