Memory effects in a Markov chain dephasing channel
arXiv:0802.4172
Abstract
We study a dephasing channel with memory, modelled by a Markov chain. We show that even weak memory effects have a detrimental impact on the performance of quantum error correcting schemes designed for uncorrelated errors. We also discuss an alternative scheme that takes advantage of memory effects to protect quantum information.
5 pages, 1 figure, NIC@QS proceedings