Long-time Low-latency Quantum Memory by Dynamical Decoupling
| Autor: | Khodjasteh, Kaveh, Sastrawan, Jarrah, Hayes, David, Green, Todd J., Biercuk, Michael J., Viola, Lorenza |
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| Rok vydání: | 2012 |
| Předmět: | |
| Zdroj: | Nature Communications 4, 2045 (2013) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/ncomms3045 |
| Popis: | Quantum memory is a central component for quantum information processing devices, and will be required to provide high-fidelity storage of arbitrary states, long storage times and small access latencies. Despite growing interest in applying physical-layer error-suppression strategies to boost fidelities, it has not previously been possible to meet such competing demands with a single approach. Here we use an experimentally validated theoretical framework to identify periodic repetition of a high-order dynamical decoupling sequence as a systematic strategy to meet these challenges. We provide analytic bounds-validated by numerical calculations-on the characteristics of the relevant control sequences and show that a "stroboscopic saturation" of coherence, or coherence plateau, can be engineered, even in the presence of experimental imperfection. This permits high-fidelity storage for times that can be exceptionally long, meaning that our device-independent results should prove instrumental in producing practically useful quantum technologies. Comment: abstract and authors list fixed |
| Databáze: | arXiv |
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