Enhanced solid-state multi-spin metrology using dynamical decoupling

POSTER

Abstract

We use multi-pulse dynamical decoupling to increase the coherence lifetime (T2) of large numbers of nitrogen-vacancy (NV) electronic spins in room temperature diamond, thus enabling scalable applications of multi-spin quantum information processing and metrology. We realize an order-of-magnitude extension of the NV multi-spin T2 for diamond samples with widely differing spin environments. For samples with nitrogen impurity concentration $\ga$ 1 ppm, we find T2 $>$ 2 ms, comparable to the longest coherence time reported for single NV centers, and demonstrate a ten-fold enhancement in NV multi-spin sensing of AC magnetic fields.

Authors

  • Linh My Pham

    • Harvard University

  • Nir Bar-Gill

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

  • Chinmay Belthangady

    • Harvard-Smithsonian Center for Astrophysics

  • David Le Sage

    • Harvard-Smithsonian Center for Astrophysics

  • Paola Cappellaro

    • MIT
    • Massachusetts Institute of Technology

  • Mikhail Lukin

    • Harvard University

  • Amir Yacoby

    • Harvard University

  • Ronald Walsworth

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