Optimized dynamical decoupling in a model quantum memory

Michael J. Biercuk (), Hermann Uys, Aaron P. VanDevender, Nobuyasu Shiga, Wayne M. Itano and John J. Bollinger
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Michael J. Biercuk: Boulder, Colorado, 80305, USA
Hermann Uys: Boulder, Colorado, 80305, USA
Aaron P. VanDevender: Boulder, Colorado, 80305, USA
Nobuyasu Shiga: Boulder, Colorado, 80305, USA
Wayne M. Itano: Boulder, Colorado, 80305, USA
John J. Bollinger: Boulder, Colorado, 80305, USA

Nature, 2009, vol. 458, issue 7241, 996-1000

Abstract: Quantum error suppression Quantum systems are subject to random phase errors that can dramatically affect the fidelity of a desired quantum operation or measurement. Quantum error correction techniques have been developed to facilitate quantum information processing, but the resource requirements are large. This motivates a search for alternative strategies to suppress dephasing in quantum systems. Now Michael Biercuk and colleagues experimentally validate the use of a technique known as dynamical decoupling using optimized pulse sequences to suppress qubit error rates. They find novel pulse sequences that suppress errors by orders of magnitude compared to other existing sequences, and the technique should be applicable across a variety of qubit technologies.

Date: 2009
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DOI: 10.1038/nature07951

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