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  1. Article

    Open Access

    Sympathetic cooling of a trapped proton mediated by an LC circuit

    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 clo...

    M. Bohman, V. Grunhofer, C. Smorra, M. Wiesinger, C. Will, M. J. Borchert in Nature (2021)

  2. No Access

    Article

    Direct limits on the interaction of antiprotons with axion-like dark matter

    Astrophysical observations indicate that there is roughly five times more dark matter in the Universe than ordinary baryonic matter1, and an even larger amount of the Universe’s energy content is attributed to da...

    C. Smorra, Y. V. Stadnik, P. E. Blessing, M. Bohman, M. J. Borchert, J. A. Devlin in Nature (2019)

  3. Article

    Open Access

    A parts-per-billion measurement of the antiproton magnetic moment

    The magnetic moment of the antiproton is measured at the parts-per-billion level, improving on previous measurements by a factor of about 350.

    C. Smorra, S. Sellner, M. J. Borchert, J. A. Harrington, T. Higuchi, H. Nagahama in Nature (2017)