Searching for Axion Dark Matter via Superconductor-Spin Hybrid Magnetometers
Abstract
Axions are a compelling dark matter candidate suggested by theories beyond the Standard Model. The predicted axion-electron coupling and the resulting pseudomagnetic field allow for laboratory axion searches. Here we report an experimental axion search via a superconductor-spin hybrid magnetometer. A state-of-the-art broadband magnetometer with a sensitivity of sub-100 aT/Hz1/2 at tens of kHz has been realized by coupling a ferrite spin sensor to a readout system based on a superconducting quantum interference device. The most stringent terrestrial constraints on the axion-electron coupling have been established in the frequency range 5∼60 kHz. In the future, an improvement on the constraints of more than 4 orders of magnitude is foreseeable through arrays of superconductor-spin hybrid magnetometers with optimized designs. This work demonstrates the potential of superconductor-spin hybrid magnetometers in high-precision magnetic field sensing and the study of fundamental physics.
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BibTeX
@misc{kang2026searching,
title = {{Searching for Axion Dark Matter via Superconductor-Spin Hybrid Magnetometers}},
author = {Runqi Kang and Jian Zhang and Liangliang Rong and Xing Rong},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.27764},
eprint = {2610.27764},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.27764},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Searching for Axion Dark Matter via Superconductor-Spin Hybrid Magnetometers
AU - Runqi Kang
AU - Jian Zhang
AU - Liangliang Rong
AU - Xing Rong
PY - 2026
DA - 2026/10/20
PB - arXiv
DO - 10.48550/arxiv.2610.27764
UR - https://arxiv.org/abs/2610.27764
AB - Axions are a compelling dark matter candidate suggested by theories beyond the Standard Model. The predicted axion-electron coupling and the resulting pseudomagnetic field allow for laboratory axion searches. Here we report an experimental axion search via a superconductor-spin hybrid magnetometer. A state-of-the-art broadband magnetometer with a sensitivity of sub-100 aT/Hz^1/2 at tens of kHz has been realized by coupling a ferrite spin sensor to a readout system based on a superconducting quantum interference device. The most stringent terrestrial constraints on the axion-electron coupling have been established in the frequency range 5∼60 kHz. In the future, an improvement on the constraints of more than 4 orders of magnitude is foreseeable through arrays of superconductor-spin hybrid magnetometers with optimized designs. This work demonstrates the potential of superconductor-spin hybrid magnetometers in high-precision magnetic field sensing and the study of fundamental physics.
ER -