Quantum network nodes with silicon-vacancy center and coupled nuclear spins in diamond nanocavities

ORAL

Abstract

We realize quantum-network nodes based on silicon-vacancy color centers in diamond nanocavities coupled to nearby nuclear spins. A high cooperativity SiV-cavity interface and efficient tapered-fiber collection allows for single-shot readout of the SiV electronic spin. With dynamical decoupling sequences, we measure a coherence time of 400μs. We observe coupling to nearby 13C spins and demonstrate coherent control of the SiV-13C register. By using these nuclear spins, we realize a quantum memory exceeding 1ms. Together with our previous work, these results pave the way for quantum computation based on 2D cluster states with more than 10 photons, and quantum communication based on quantum repeaters.

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Presenters

  • Denis Sukachev

    • Harvard University

Authors

  • Denis Sukachev

    • Harvard University

  • Mihir K Bhaskar

    • Harvard University

  • Christian T Nguyen

    • Harvard University

  • Ruffin Evans

    • Harvard University

  • Bartholomeus Machielse

    • Harvard University

  • Hongkun Park

    • Dept. of Chemistry and Chemical Biology and Dept. of Physics, Harvard University
    • Harvard University
    • Chemistry and Chemical Biology, Harvard University

  • Marko Loncar

    • Harvard University

  • Mikhail Lukin

    • Harvard University
    • Physics, Harvard University