Ultralight dark matter searches at the sub-Hz frontier with atom multigradiometry
Ultralight dark matter searches at the sub-Hz frontier with atom multigradiometry
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DOI：
10.1103/physrevd.107.055002
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发表时间：
2022-11
影响因子：
5
通讯作者：
L. Badurina;Valerie Gibson;C. McCabe;Jeremiah Mitchell
中科院分区：
文献类型：
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作者：
L. Badurina;Valerie Gibson;C. McCabe;Jeremiah Mitchell
单光子原子梯度测量是一种强大的实验技术，可以用来研究超轻标量暗物质(ULDM)诱导的原子跃迁能量的振荡。在亚赫兹区域，背景预计将由重力梯度噪声(GGN)主导，GGN是由于实验周围的质量波动而产生的。在这项工作中，我们将GGN建模为表面瑞利波，并构造了一个基于似然分析的分析，该分析在1 MHz到1 Hz的频率窗口内一致地将GGN合并到垂直原子梯度计的灵敏度估计中。我们表明，在某些地质环境下，当操作多梯度仪配置时，GGN可以显著减轻，该配置由同一基线中的三个或更多原子干涉仪组成。多梯度仪实验，如AION和MAGIS-100的未来版本，有可能探测亚赫兹区域中标量ULDM参数空间的区域，这些区域尚未被现有实验排除。
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 we 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 multigradiometer configuration, which consists of three or more atom interferometers in the same baseline. Multigradiometer 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.