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arXiv · 2509.20862

Muonium Spectroscopy as a Quantum Sensor for Ultralight Axion Dark Matter

Feng Fang·Kim Siang Khaw·Ce Zhang·Qiaoli Yang·Liangwen Chen·Jie Yang·Lei Yang·Zhiyu Sun
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Abstract

High-intensity muon beams could enable a Muonium-based Axion Search through resonant quantum transitions between Hyperfine states (MASH). Combining theoretical calculations with simulation results, we demonstrate that such a muonium-based experimental approach could complement and tighten constraints on the axion-muon coupling beyond existing limits from the muon $g\!-\!2$ measurement, over the axion mass range of 18--130 $\mu$eV. These results establish a new spectroscopic channel in muonium that enables searches for axion and axion-like particle dark matter.

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Feng Fang, Kim Siang Khaw, Ce Zhang, Qiaoli Yang, Liangwen Chen, Jie Yang, Lei Yang, Zhiyu Sun. 2025-09-25. Muonium Spectroscopy as a Quantum Sensor for Ultralight Axion Dark Matter. https://doi.org/10.1103/483j-ct1h

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