Unconditional Security with Decoherence-Free Subspaces
Quantum Physics
2012-04-19 v3
Abstract
We show how to use decoherence-free subspaces over collective-noise quantum channels to convey classical information in perfect secrecy. We argue that codes defined over decoherence-free subspaces are codes for quantum wiretap channels in which the gain of information by a non-authorized receiver is zero. We also show that if some symmetry conditions are guaranteed, the maximum rate on which these secret communications take place is equal to the Holevo-Schumacher-Westmoreland capacity of the quantum channel.
Cite
@article{arxiv.1204.3000,
title = {Unconditional Security with Decoherence-Free Subspaces},
author = {Elloá B. Guedes and Francisco M. de Assis},
journal= {arXiv preprint arXiv:1204.3000},
year = {2012}
}
Comments
6 pages, 1 figure. Submitted to Physical Review A