Dark matter search with a strongly-coupled hybrid spin system

• URL: http://arxiv.org/abs/2306.08039v1
• Date: Tue, 13 Jun 2023 18:00:08 GMT
• Title: Dark matter search with a strongly-coupled hybrid spin system
• Authors: Kai Wei, Zitong Xu, Yuxuan He, Xiaolin Ma, Xing Heng, Xiaofei Huang, Wei Quan, Wei Ji, Jia Liu, Xiaoping Wang, Jiancheng Fang, Dmitry Budker
• Abstract summary: We present a broadband search for axion-like dark matter with Compton frequencies in the range of $[0.01, 1000]$ Hz. For the axion-neutron coupling, our results reach a low value of $|g_ann|le 3times 10-10$ in the frequency range $[0.02, 4]$ Hz. For the axion-proton coupling, we offer the best terrestrial constraints for the frequency below 100 Hz.
• Score: 12.781191099586698
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Observational evidence suggests the existence of dark matter (DM), which comprises approximately $84.4\%$ of matter in the universe. Recent advances in tabletop quantum sensor technology have enabled searches for nongravitational interactions of DM. Our experiment named ChangE utilizes Coupled Hot Atom eNsembles to search for liGht dark mattEr and new physics. We identify a strongly-coupled hybrid spin-resonance (HSR) regime that enhances the bandwidth of $^{21}$Ne nuclear spin by three orders of magnitude while maintaining high sensitivity. In combination with a self-compensating mode (SC) for low frequencies, we present a comprehensive broadband search for axion-like dark matter with Compton frequencies in the range of $[0.01, 1000]$ Hz. We set new constraints on the DM interactions with neutrons and protons, accounting for the stochastic effect. For the axion-neutron coupling, our results reach a low value of $|g_{ann}|\le 3\times 10^{-10}$ in the frequency range $[0.02 , 4]$ Hz surpassing astrophysical limits and provide the strongest laboratory constraints in the $[10, 100]$ Hz range. For the axion-proton coupling, we offer the best terrestrial constraints for the frequency below 100 Hz.

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