Coherent spin control of a nanocavity-enhanced qubit in diamond

A central aim of quantum information processing is the efficient entanglement of multiple stationary quantum memories via photons. Among solid-state systems, the nitrogen-vacancy centre in diamond has emerged as an excellent optically addressable memory with second-scale electron spin coherence time...

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Bibliographic Details
Published in:Nature communications 2015-01, Vol.6 (48)
Main Authors: Li, Luozhou, Lu, Ming, Schroder, Tim, Chen, Edward H., Walsh, Michael, Bayn, Igal, Goldstein, Jordan, Gaathon, Ophir, Trusheim, Matthew E., Mower, Jacob, Cotlet, Mircea, Markham, Matthew L., Twitchen, Daniel J., Englund, Dirk
Format: Article
Language:English
Subjects:
functional nanomaterials
NANOSCIENCE AND NANOTECHNOLOGY
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Summary:A central aim of quantum information processing is the efficient entanglement of multiple stationary quantum memories via photons. Among solid-state systems, the nitrogen-vacancy centre in diamond has emerged as an excellent optically addressable memory with second-scale electron spin coherence times. Recently, quantum entanglement and teleportation have been shown between two nitrogen-vacancy memories, but scaling to larger networks requires more efficient spin-photon interfaces such as optical resonators. Here we report such nitrogen-vacancy nanocavity systems in strong Purcell regime with optical quality factors approaching 10,000 and electron spin coherence times exceeding 200 µs using a silicon hard-mask fabrication process. This spin-photon interface is integrated with on-chip microwave striplines for coherent spin control, providing an efficient quantum memory for quantum networks.
ISSN:2041-1723
2041-1723