Improvement in T2* via Cancellation of Spin Bath Induced Dephasing in Solid-State Spins

POSTER

Abstract

In measurements using ensembles of nitrogen vacancy (NV) centers in diamond, the magnetic field sensitivity can be improved by increasing the NV spin dephasing time, T2*. For NV ensembles, T2* is limited by dephasing arising from variations in the local environment sensed by individual NVs, such as applied magnetic fields, noise induced by other nearby spins, and strain. Here, we describe a systematic study of parameters influencing the NV ensemble T2*, and efforts to mitigate sources of inhomogeneity with demonstrated T2* improvements exceeding one order of magnitude.

Authors

  • Erik Bauch

    • Harvard Univ

  • Connor Hart

    • Harvard University
    • Harvard Univ

  • Jennifer Schloss

    • Massachusetts Institute of Technology
    • Massachusetts Institute of Tech

  • Matthew Turner

    • Harvard University
    • Harvard Univ

  • John Barry

    • MIT Lincoln Labs
    • Smithsonian Center for Astrophysics

  • Ron Walsworth

    • Harvard University
    • Smithsonian Center for Astrophysics
    • Harvard Smithsonian Center for Astrophysics, Harvard Physics