[Submitted on 3 Nov 2022]

    Download PDF

    Abstract: Single-photon atom gradiometry is a powerful experimental technique that can
    be employed to search for the oscillation of atomic transition energies induced
    by ultralight scalar dark matter (ULDM). In the sub-Hz regime the background is
    expected to be dominated by gravity gradient noise (GGN), which arises as a
    result of mass fluctuations around the experiment. In this work we model the
    GGN as surface Rayleigh waves and construct a likelihood-based analysis that
    consistently folds GGN into the sensitivity estimates of vertical atom
    gradiometers in the frequency window between 1 mHz and 1 Hz. We show that in
    certain geological settings GGN can be significantly mitigated when operating a
    multi-gradiometer configuration, which consists of three or more atom
    interferometers in the same baseline. Multi-gradiometer experiments, such as
    future versions of AION and MAGIS-100, have the potential to probe regions of
    scalar ULDM parameter space in the sub-Hz regime that have not been excluded by
    existing experiments.

    Submission history

    From: Leonardo Badurina [view email]

    Thu, 3 Nov 2022 14:42:53 UTC (3,060 KB)

    Source link


    Leave A Reply