Spin ensemble-based AC magnetometry using concatenated dynamical decoupling at low temperatures

D. Farfurnik*, A. Jarmola, D. Budker, N. Bar-Gill

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Ensembles of nitrogen-vacancy centers in diamond are widely used as AC magnetometers. While such measurements are usually performed using standard (XY) dynamical decoupling (DD) protocols at room temperature, we study the sensitivities achieved by utilizing various DD protocols, for measuring magnetic AC fields at frequencies in the 10-250 kHz range, at room temperature and 77 K. By performing measurements on an isotopically pure 12C sample, we find that the Carr-Purcell-Meiboom-Gill protocol, which is not robust against pulse imperfections, is less efficient for magnetometry than robust XY-based sequences. The concatenation of a standard XY-based protocol may enhance the sensitivities only for measuring high-frequency fields, for which many (> 500) DD pulses are necessary and the robustness against pulse imperfections is critical. Moreover, we show that cooling is effective only for measuring low-frequency fields (∼10 kHz), for which the experiment time approaches T 1 at a small number of applied DD pulses.

Original languageAmerican English
Article number024008
JournalJournal of Optics (United Kingdom)
Issue number2
StatePublished - Feb 2018

Bibliographical note

Publisher Copyright:
© 2018 IOP Publishing Ltd.


  • NV centers
  • dynamical decoupling
  • magnetic sensing
  • magnetometry
  • nitrogen-vacancy


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