Improving the coherence properties of solid-state spin ensembles via optimized dynamical decoupling

D. Farfurnik*, A. Jarmola, L. M. Pham, Z. H. Wang, V. V. Dobrovitski, R. L. Walsworth, D. Budker, N. Bar-Gill

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

In this work, we optimize a dynamical decoupling (DD) protocol to improve the spin coherence properties of a dense ensemble of nitrogen-vacancy (NV) centers in diamond. Using liquid nitrogen-based cooling and DD microwave pulses, we increase the transverse coherence time T2 from ∼ 0.7 ms up to ∼ 30 ms. We extend previous work of single-axis (Carr-Purcell-Meiboom-Gill) DD towards the preservation of arbitrary spin states. After performing a detailed analysis of pulse and detuning errors, we compare the performance of various DD protocols. We identify that the concatenated XY8 pulse sequences serves as the optimal control scheme for preserving an arbitrary spin state. Finally, we use the concatenated sequences to demonstrate an immediate improvement of the AC magnetic sensitivity up to a factor of two at 250 kHz. For future work, similar protocols may be used to increase coherence times up to NV-NV interaction time scales, a major step toward the creation of quantum collective NV spin states.

Original languageAmerican English
Title of host publicationQuantum Optics
EditorsAndrew J. Shields, Jurgen Stuhler
PublisherSPIE
ISBN (Electronic)9781510601451
DOIs
StatePublished - 2016
EventQuantum Optics - Brussels, Belgium
Duration: 5 Apr 20167 Apr 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9900
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceQuantum Optics
Country/TerritoryBelgium
CityBrussels
Period5/04/167/04/16

Bibliographical note

Publisher Copyright:
© 2016 COPYRIGHT SPIE.

Keywords

  • NV
  • XY8
  • coherence
  • concatenated
  • decoherence
  • dynamical decoupling
  • magnetometry
  • nitrogen vacancy

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