Optimal signal ensembles
Quantum Physics
2007-05-23 v1
Abstract
Classical messages can be sent via a noisy quantum channel in various ways, corresponding to various choices of signal states of the channel. Previous work by Holevo and by Schumacher and Westmoreland relates the capacity of the channel to the properties of the signal ensemble. Here we describe some properties characterizing the ensemble that maximizes the capacity, using the relative entropy "distance" between density operators to give the results a geometric flavor.
Keywords
Cite
@article{arxiv.quant-ph/9912122,
title = {Optimal signal ensembles},
author = {Benjamin Schumacher and Michael D. Westmoreland},
journal= {arXiv preprint arXiv:quant-ph/9912122},
year = {2007}
}
Comments
12 pages, 1 eps figure