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