The Fermionic Axion Interferometer

TL;DR

The paper discusses the development and implementation of a fermionic interferometer designed to detect axion-induced spin precession, expanding the search for dark matter axions within a specific mass range.

Contribution

It introduces a novel fermionic interferometer setup for axion detection, detailing its design, implementation, and potential to explore new axion parameter space.

Findings

Successfully built and characterized the interferometer

Set new limits on axion-like particles in the sub-neV mass range

Demonstrated the feasibility of spin-based dark matter detection methods

Abstract

The axion is an hypothetical beyond the Standard Model particle. Its experimental search is an ongoing effort, and an expanding number of techniques keep on narrowing its parameters space. Leveraging the interaction between dark matter axions and spins, a fermionic interferometer is an experiment which aims at detecting the axion-induced precession of a spin resonance. We describe the detection scheme, outline the possible experimental implementations, their sensitive axion-mass range and discovery potential. Furthermore, the building and characterisation of an axion interferometer is explained in details and the resulting setup is used to search for sub-neV dark matter.