NV-Diamond Magnetometry in the NV-NV Interaction Limit

ORAL

Abstract

In nitrogen-vacancy (NV) ensembles in diamond, the magnetic sensitivity is commonly limited by a bath of other impurity spins, which decoheres the NV sensor spins. We demonstrate mitigation of NV-bath interactions by RF control of the spin bath or dynamical decoupling of the NV centers. In this regime, mutual NV-NV dipolar interactions dominate the ensemble spin properties (T2, T2*). These techniques may yield improved DC and AC magnetic sensitivity up to a limit set by NV-NV dipolar interactions. For example, we show NV ensemble coherence times under XY8-n dynamical decoupling protocols limited by instantaneous diffusion. We present progress toward mitigating NV-NV interactions while preserving magnetic sensitivity, and conversely we outline ideas to leverage strong NV-NV interactions to further improve magnetic sensitivity.

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Presenters

  • Connor Hart

    Physics, Harvard University, Harvard University

Authors

  • Connor Hart

    Physics, Harvard University, Harvard University

  • Erik Bauch

    Physics, Harvard University, Harvard University

  • Jennifer Schloss

    Massachusetts Institute of Technology, Physics, Massachusetts Institute of Technology, MIT

  • Raisa Trubko

    Harvard University

  • Matthew J Turner

    Physics, Harvard University, Harvard University

  • Diana Prado Lopes Aude Craik

    Harvard University, Physics, Harvard University

  • Ronald L Walsworth

    Harvard-Smithsonian Center for Astrophysics & Department of Physics, Harvard University & Center for Brain Science, Harvard University, Harvard University, Harvard-Smithsonian CFA, Harvard-Smithsonian CfA, Smithsonian - CFA, Harvard University