Kaveh Khodjasteh, Michael J. Biercuk, Lorenza Viola
Practical quantum memory applications demand high-fidelity storage of arbitrary states for long times, while ensuring a small access latency and operating under technological control limitations. Building on exact results available for the paradigmatic case of a single qubit exposed to phase noise, we identify periodic repetition of a high-order dynamical decoupling sequence as a systematic strategy to meet these demands. We demonstrate how numerical search can be invoked to efficiently find the sequence best suited for repetition as well as for validating our analytical insights.
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http://arxiv.org/abs/1206.6087
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