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Improved bounds on Lorentz violation from composite pulse Ramsey spectroscopy in a trapped ion

Author

Listed:
  • Laura S. Dreissen

    (Physikalisch-Technische Bundesanstalt)

  • Chih-Han Yeh

    (Physikalisch-Technische Bundesanstalt)

  • Henning A. Fürst

    (Physikalisch-Technische Bundesanstalt
    Leibniz Universität Hannover)

  • Kai C. Grensemann

    (Physikalisch-Technische Bundesanstalt)

  • Tanja E. Mehlstäubler

    (Physikalisch-Technische Bundesanstalt
    Leibniz Universität Hannover)

Abstract

In attempts to unify the four known fundamental forces in a single quantum-consistent theory, it is suggested that Lorentz symmetry may be broken at the Planck scale. Here we search for Lorentz violation at the low-energy limit by comparing orthogonally oriented atomic orbitals in a Michelson-Morley-type experiment. We apply a robust radiofrequency composite pulse sequence in the 2F7/2 manifold of an Yb+ ion, extending the coherence time from 200 μs to more than 1 s. In this manner, we fully exploit the high intrinsic susceptibility of the 2F7/2 state and take advantage of its exceptionally long lifetime. We match the stability of the previous best Lorentz symmetry test nearly an order of magnitude faster and improve the constraints on the symmetry breaking coefficients to the 10−21 level. These results represent the most stringent test of this type of Lorentz violation. The demonstrated method can be further extended to ion Coulomb crystals.

Suggested Citation

  • Laura S. Dreissen & Chih-Han Yeh & Henning A. Fürst & Kai C. Grensemann & Tanja E. Mehlstäubler, 2022. "Improved bounds on Lorentz violation from composite pulse Ramsey spectroscopy in a trapped ion," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-34818-0
    DOI: 10.1038/s41467-022-34818-0
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    References listed on IDEAS

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    1. Christian Sanner & Nils Huntemann & Richard Lange & Christian Tamm & Ekkehard Peik & Marianna S. Safronova & Sergey G. Porsev, 2019. "Optical clock comparison for Lorentz symmetry testing," Nature, Nature, vol. 567(7747), pages 204-208, March.
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