Toward Quantum Non-demolition of nitrogen-vacancy centers in diamond

ORAL

Abstract

The nitrogen-vacancy color center (NVC) in diamond, which possesses a long-lived electronic spin (S=1) ground state with optical addressability, is a promising platform for quantum networks, single-photon sources, and nanoscale magnetometers. Here, we make use of a nuclear spin based quantum memory to demonstrate quantum non-demolition measurement of a solid-state spin qubit. By entangling the electron spin with a polarized carbon-13 spin (I=1/2) in the lattice, we have repeated optical measurement of the electron spin for the polarization lifetime of the nuclear spin. We show relative improvements in signal-to-noise of greater than 300\%. These techniques can be used to improve the sensitivity of NVC magnetometers.

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Authors

  • Jonathan Hodges

    • Harvard University and Massachusetts Institute of Technology

  • Liang Jiang

    • Harvard University, Department of Physics

  • Jero Maze

    • Physics Department, Harvard University, ITAMP, Harvard-Smithsonian Center for Astrophysics
    • Harvard University, Department of Physics
    • Harvard University

  • Mikhail Lukin

    • Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA
    • Physics Department, Harvard University, Cambridge, MA 02138, USA
    • Harvard University, Department of Physics
    • Physics Department, Harvard University
    • Harvard University
    • Harvard University, Cambridge, MA 02138, USA