Constraints on axion dark matter by distributed intercity quantum sensors - Nature

"Y.W. designed the experimental protocols, performed experiments, analysed the data and wrote the manuscript. Y.H., X.K., D.C., J.X.X. and W.Z. performed experiments and edited the manuscript. Y.C. and S.P. edited the manuscript. M.J., X.P. and J.D. proposed the experimental concept, designed experimental protocols and proofread and edited the manuscript. All authors contributed with discussions and checking the manuscript. Corresponding authors Correspondence to Min Jiang or Xinhua Peng."

"State Key Laboratory of Dark Matter Physics, Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai, China Yifan Chen Key Laboratory for Particle Astrophysics and Cosmology (MOE) and Shanghai Key Laboratory for Particle Physics and Cosmology, Shanghai Jiao Tong University, Shanghai, China Yifan Chen Institute of Physics, Jagiellonian University, Kraków, Poland Szymon Pustelny Hefei National Laboratory, University of Science and Technology of China, Hefei, China Xinhua Peng & Jiangfeng Du"

Experimental protocols were designed and implemented for investigations combining spin magnetic resonance and quantum precision measurement techniques. Experiments were performed and data were analysed to validate the protocols and extract results. Multiple specialized laboratories contributed expertise spanning spin magnetic resonance, quantum precision measurement, dark matter physics, particle astrophysics, microscale physical sciences, and ocean sensing. Project activities included proposing experimental concepts, designing protocols, executing measurements, analysing data, and conducting collaborative verification across institutions. The work integrated cross-disciplinary instrumentation and measurement capabilities and emphasized protocol development, experimental rigor, and thorough data checking. Specialized facilities and national laboratories facilitated high-precision measurements and interdisciplinary coordination.

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