Classical capacity of a qubit depolarizing channel with memory
Quantum Physics
2009-06-23 v1
Abstract
The classical product state capacity of a noisy quantum channel with memory is investigated. A forgetful noise-memory channel is constructed by Markov switching between two depolarizing channels which introduces non-Markovian noise correlations between successive channel uses. The computation of the capacity is reduced to an entropy computation for a function of a Markov process. A reformulation in terms of algebraic measures then enables its calculation. The effects of the hidden-Markovian memory on the capacity are explored. An increase in noise-correlations is found to increase the capacity.
Keywords
Cite
@article{arxiv.0901.2516,
title = {Classical capacity of a qubit depolarizing channel with memory},
author = {Jeroen Wouters and Ismail Akhalwaya and Mark Fannes and Francesco Petruccione},
journal= {arXiv preprint arXiv:0901.2516},
year = {2009}
}