On the entanglement-assisted classical capacity of infinite-dimensional quantum channels
Abstract
The coding theorem for the entanglement-assisted communication via infinite-dimensional quantum channel with linear constraint is extended to a natural degree of generality. Relations between the entanglement-assisted classical capacity and the -capacity of constrained channels are obtained and conditions for their coincidence are given. Sufficient conditions for continuity of the entanglement-assisted classical capacity as a function of a channel are obtained. Some applications of the obtained results to analysis of Gaussian channels are considered. A general (continuous) version of the fundamental relation between the coherent information and the measure of privacy of classical information transmission by infinite-dimensional quantum channel is proved.
Keywords
Cite
@article{arxiv.1210.6926,
title = {On the entanglement-assisted classical capacity of infinite-dimensional quantum channels},
author = {A. S. Holevo and M. E. Shirokov},
journal= {arXiv preprint arXiv:1210.6926},
year = {2013}
}
Comments
26 pages, minor corrections have been made