Discovering QCD-Coupled Axion Dark Matter with Polarization Haloscopes

Abstract

In the presence of QCD axion dark matter, atoms acquire time-dependent electric dipole moments. This effect gives rise to an oscillating current in a nuclear spin-polarized dielectric, which can resonantly excite an electromagnetic mode of a microwave cavity. We show that with existing technology such a "polarization haloscope" can explore orders of magnitude of new parameter space for QCD-coupled axions. If any cavity haloscope detects a signal from the axion-photon coupling, an upgraded polarization haloscope has the unique ability to test whether it arises from the QCD axion.

11 pages, 2 figures. v2: discussion expanded, matches journal version

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Cited by in corpus (6)

• Effective Field Theory for Dark Matter Absorption on Single Phonons
• Physical Signatures of Fermion-Coupled Axion Dark Matter
• Pi in the Sky: Neutron Stars with Exceptionally Light QCD Axions
• New Technologies for Axion and Dark Photon Searches
• The statistics and sensitivity of axion wind detection with the homogeneous precession domain of superfluid helium-3
• GALILEO: Galactic Axion Laser Interferometer Leveraging Electro-Optics