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Sympathetic cooling of a trapped proton mediated by an LC circuit

Author

Listed:
  • M. Bohman

    (Max-Planck-Institut für Kernphysik
    RIKEN, Fundamental Symmetries Laboratory)

  • V. Grunhofer

    (Johannes Gutenberg-Universität)

  • C. Smorra

    (RIKEN, Fundamental Symmetries Laboratory
    Johannes Gutenberg-Universität)

  • M. Wiesinger

    (Max-Planck-Institut für Kernphysik
    RIKEN, Fundamental Symmetries Laboratory)

  • C. Will

    (Max-Planck-Institut für Kernphysik)

  • M. J. Borchert

    (RIKEN, Fundamental Symmetries Laboratory
    Leibniz Universität Hannover
    Physikalisch-Technische Bundesanstalt)

  • J. A. Devlin

    (RIKEN, Fundamental Symmetries Laboratory
    CERN)

  • S. Erlewein

    (RIKEN, Fundamental Symmetries Laboratory
    CERN)

  • M. Fleck

    (RIKEN, Fundamental Symmetries Laboratory
    University of Tokyo)

  • S. Gavranovic

    (Johannes Gutenberg-Universität)

  • J. Harrington

    (Max-Planck-Institut für Kernphysik
    RIKEN, Fundamental Symmetries Laboratory)

  • B. Latacz

    (RIKEN, Fundamental Symmetries Laboratory)

  • A. Mooser

    (Max-Planck-Institut für Kernphysik)

  • D. Popper

    (Johannes Gutenberg-Universität)

  • E. Wursten

    (RIKEN, Fundamental Symmetries Laboratory
    CERN)

  • K. Blaum

    (Max-Planck-Institut für Kernphysik)

  • Y. Matsuda

    (University of Tokyo)

  • C. Ospelkaus

    (Leibniz Universität Hannover
    Physikalisch-Technische Bundesanstalt)

  • W. Quint

    (GSI Helmholtzzentrum für Schwerionenforschung GmbH)

  • J. Walz

    (Johannes Gutenberg-Universität
    Helmholtz-Institut Mainz)

  • S. Ulmer

    (RIKEN, Fundamental Symmetries Laboratory)

Abstract

Efficient cooling of trapped charged particles is essential to many fundamental physics experiments1,2, to high-precision metrology3,4 and to quantum technology5,6. Until now, sympathetic cooling has required close-range Coulomb interactions7,8, but there has been a sustained desire to bring laser-cooling techniques to particles in macroscopically separated traps5,9,10, extending quantum control techniques to previously inaccessible particles such as highly charged ions, molecular ions and antimatter. Here we demonstrate sympathetic cooling of a single proton using laser-cooled Be+ ions in spatially separated Penning traps. The traps are connected by a superconducting LC circuit that enables energy exchange over a distance of 9 cm. We also demonstrate the cooling of a resonant mode of a macroscopic LC circuit with laser-cooled ions and sympathetic cooling of an individually trapped proton, reaching temperatures far below the environmental temperature. Notably, as this technique uses only image–current interactions, it can be easily applied to an experiment with antiprotons1, facilitating improved precision in matter–antimatter comparisons11 and dark matter searches12,13.

Suggested Citation

  • M. Bohman & V. Grunhofer & C. Smorra & M. Wiesinger & C. Will & M. J. Borchert & J. A. Devlin & S. Erlewein & M. Fleck & S. Gavranovic & J. Harrington & B. Latacz & A. Mooser & D. Popper & E. Wursten , 2021. "Sympathetic cooling of a trapped proton mediated by an LC circuit," Nature, Nature, vol. 596(7873), pages 514-518, August.
    • Handle: RePEc:nat:nature:v:596:y:2021:i:7873:d:10.1038_s41586-021-03784-w
    DOI: 10.1038/s41586-021-03784-w
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