Document Type
Article
Publication Date
6-19-2013
Publication Title
Nature Communications
Department
Department of Physics and Astronomy
Abstract
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.
DOI
10.1038/ncomms3045
Dartmouth Digital Commons Citation
Khodjasteh, Kaveh; Sastrawan, Jarrah; Hayes, David; Green, Todd J.; Biercuk, Michael J.; and Viola, Lorenza, "Designing a Practical High-Fidelity Long-Time Quantum Memory" (2013). Dartmouth Scholarship. 2626.
https://digitalcommons.dartmouth.edu/facoa/2626
