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Coherent spin control of a nanocavity-enhanced qubit in diamond

Author

Listed:
  • Luozhou Li

    (Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA)

  • Tim Schröder

    (Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA)

  • Edward H. Chen

    (Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA)

  • Michael Walsh

    (Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA)

  • Igal Bayn

    (Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA)

  • Jordan Goldstein

    (Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA)

  • Ophir Gaathon

    (Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
    Present address: Diamond Nanotechnologies Inc. Boston, Massachusetts 02134, USA)

  • Matthew E. Trusheim

    (Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA)

  • Ming Lu

    (Center for Functional Nanomaterials, Brookhaven National Laboratory)

  • Jacob Mower

    (Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA)

  • Mircea Cotlet

    (Center for Functional Nanomaterials, Brookhaven National Laboratory)

  • Matthew L. Markham

    (Element Six)

  • Daniel J. Twitchen

    (Element Six)

  • Dirk Englund

    (Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA)

Abstract

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 the 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.

Suggested Citation

  • Luozhou Li & Tim Schröder & Edward H. Chen & Michael Walsh & Igal Bayn & Jordan Goldstein & Ophir Gaathon & Matthew E. Trusheim & Ming Lu & Jacob Mower & Mircea Cotlet & Matthew L. Markham & Daniel J., 2015. "Coherent spin control of a nanocavity-enhanced qubit in diamond," Nature Communications, Nature, vol. 6(1), pages 1-7, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7173
    DOI: 10.1038/ncomms7173
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