Suppression of Spin Noise in Diamond for improved Sensing and Imaging

POSTER

Abstract

Increasing the coherence time of nitrogen vacancy (NV) center spins in diamond is of great interest for quantum information, sensing and metrology applications. However, achieving long coherence times remains a challenge in dense samples, where the NV's $T_2$ is limited by electronic spin-spin interaction of the nitrogen donors in the lattice. In these samples, nuclear spin impurities associated with the $^{13}$C isotopes can suppress the dominant nitrogen electronic spin bath by reducing the flip-flop rates and enhancing the NV's coherence time. We investigate this spin bath suppression effect both experimentally and theoretically and provide a pathway to engineering high density NV samples with sufficiently long coherence times.

Authors

  • Erik Bauch

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

  • Junghyun Lee

    • Massachusetts Inst of Tech-MIT
    • Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

  • Swati Singh

    • ITAMP
    • ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, 02138, USA
    • ITAMP, Harvard-Smithsonian Center for Astrophysics

  • My Linh Pham

    • Harvard-Smithsonian Center for Astrophysics
    • Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138, USA

  • Keigo Arai

    • Massachusetts Inst of Tech-MIT
    • Massachusetts Institute of Technology
    • Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA

  • Ronald L. Walsworth

    • Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA.
    • Harvard Smithsonian Center for Astrophysics
    • Harvard-Smithsonian Center for Astrophysics
    • Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA