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arxiv: 0802.4172 · v1 · submitted 2008-02-28 · 🪐 quant-ph

Memory effects in a Markov chain dephasing channel

classification 🪐 quant-ph
keywords memoryeffectschainchanneldephasingmarkovquantumadvantage
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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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