Randomization of Pulse Phases for Unambiguous and Robust Quantum Sensing

Zhen-Yu Wang, Jacob E. Lang, Simon Schmitt, Johannes Lang, Jorge Casanova, Liam McGuinness, Tania S. Monteiro, Fedor Jelezko, and Martin B. Plenio
Phys. Rev. Lett. 122, 200403 – Published 24 May 2019
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Abstract

We develop theoretically and demonstrate experimentally a universal dynamical decoupling method for robust quantum sensing with unambiguous signal identification. Our method uses randomization of control pulses to simultaneously suppress two types of errors in the measured spectra that would otherwise lead to false signal identification. These are spurious responses due to finite-width π pulses, as well as signal distortion caused by π pulse imperfections. For the cases of nanoscale nuclear-spin sensing and ac magnetometry, we benchmark the performance of the protocol with a single nitrogen vacancy center in diamond against widely used nonrandomized pulse sequences. Our method is general and can be combined with existing multipulse quantum sensing sequences to enhance their performance.

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  • Received 5 March 2019

DOI:https://doi.org/10.1103/PhysRevLett.122.200403

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyGeneral Physics

Authors & Affiliations

Zhen-Yu Wang1,*, Jacob E. Lang2, Simon Schmitt3, Johannes Lang3, Jorge Casanova4,5, Liam McGuinness3, Tania S. Monteiro2, Fedor Jelezko3, and Martin B. Plenio1

  • 1Institut für Theoretische Physik und IQST, Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany
  • 2Department of Physics and Astronomy, University College London, Gower Street, London, England WC1E 6BT, United Kingdom
  • 3Institute of Quantum Optics, Universität Ulm, Albert-Einstein-Allee 11, D-89069 Ulm, Germany
  • 4Department of Physical Chemistry, University of the Basque Country UPV/EHU, Apartado 644, 48080 Bilbao, Spain
  • 5Ikerbasque, Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain

  • *zhenyu.wang@uni-ulm.de

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Issue

Vol. 122, Iss. 20 — 24 May 2019

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