Memory effects in a Markov chain dephasing channel

Details Memory effects in a Markov chain dephasing channel Memory effects in a Markov chain dephasing channel

2008-02-28

arxiv.org/abs/0802.4172v1

International Journal of Quantum Information 6, 651 (2008)

Physics

Quantum Physics

5 pages, 1 figure, NIC@QS proceedings

Scientific paper

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.

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