Searching for axion forces with spin precession in atoms and molecules

Abstract

We propose to use atoms and molecules as quantum sensors of axion-mediated monopole-dipole forces. We show that electron spin precession experiments using atomic and molecular beams are well-suited for axion searches thanks to the presence of co-magnetometer states and single-shot temporal resolution. Experimental strategies to detect axion gradients from localised sources and the earth are presented, taking ACME III as a prototype example. Other possibilities including atomic beams, and laser-cooled atoms and molecules are discussed.

arXiv comment9 pages, 2 figures. Comments welcome. V2: matches published version. Appendix on axion co-magnetometry added

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