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Detecting Ultralight Bosonic Dark Matter via Absorption in Superconductors
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Superconducting targets have recently been proposed for the direct detection of dark matter as light as a keV, via elastic scattering off conduction electrons in Cooper pairs. Detecting such light dark matter requires sensitivity to energies as small as the superconducting gap of O(meV). Here we show that these same superconducting devices can detect much lighter DM, of meV to eV mass, via dark matter absorption on a conduction electron, followed by emission of an athermal phonon. We demonstrate the power of this setup for relic kinetically mixed hidden photons, pseudoscalars, and scalars, showing the reach can exceed current astrophysical and terrestrial constraints with only a moderate exposure.
Forward citations
Cited by 6 Pith papers
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Axion dark matter with meV-scale masses could be absorbed by magnons in nickel oxide, producing both resonant and broadband detection channels.
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First direct search for light dark matter interactions in a transition-edge sensor
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