Versatile Atomic Magnetometry Assisted by Bayesian Inference

R. Puebla, Y. Ban, J.F. Haase, M.B. Plenio, M. Paternostro, and J. Casanova
Phys. Rev. Applied 16, 024044 – Published 25 August 2021
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Abstract

Quantum sensors typically translate external fields into a periodic response whose frequency is then determined by analyses performed in Fourier space. This allows for a linear inference of the parameters that characterize external signals. In practice, however, quantum sensors are able to detect fields only in a narrow range of amplitudes and frequencies. A departure from this range, as well as the presence of significant noise sources and short detection times, lead to a loss of the linear relationship between the response of the sensor and the target field, thus limiting the working regime of the sensor. Here we address these challenges by means of a Bayesian inference approach that is tolerant to strong deviations from desired periodic responses of the sensor and is able to provide reliable estimates even with a very limited number of measurements. We demonstrate our method for an 171Yb+ trapped-ion quantum sensor but stress the general applicability of this approach to different systems.

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  • Received 20 March 2020
  • Revised 21 July 2021
  • Accepted 26 July 2021

DOI:https://doi.org/10.1103/PhysRevApplied.16.024044

© 2021 American Physical Society

Physics Subject Headings (PhySH)

Quantum Information, Science & TechnologyAtomic, Molecular & OpticalStatistical Physics & ThermodynamicsGeneral PhysicsCondensed Matter, Materials & Applied PhysicsInterdisciplinary PhysicsNetworks

Authors & Affiliations

R. Puebla1,2,*, Y. Ban3,4, J.F. Haase5,6, M.B. Plenio7, M. Paternostro2, and J. Casanova3,8

  • 1Instituto de Física Fundamental, IFF-CSIC, Calle Serrano 113b, Madrid 28006, Spain
  • 2Centre for Theoretical Atomic, Molecular and Optical Physics, Queen’s University Belfast, Belfast BT7 1NN, United Kingdom
  • 3Department of Physical Chemistry, University of the Basque Country UPV/EHU, Apartado 644, Bilbao 48080, Spain
  • 4School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
  • 5Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
  • 6Department of Physics & Astronomy, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
  • 7Institute of Theoretical Physics and IQST, Albert-Einstein-Allee 11, Universität Ulm, Ulm D-89069, Germany
  • 8IKERBASQUE, Basque Foundation for Science, Maria Diaz de Haro 3, Bilbao 48013, Spain

  • *rpueblaantunes@gmail.com

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Issue

Vol. 16, Iss. 2 — August 2021

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