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Rydberg Single Photon Detection for Probing 0.1-10 meV Dark Matter with BREAD
Abhishek Banerjee, Reza Ebadi, Surjeet Rajendran·October 31, 2025
hep-phastro-ph.COQuantum Physics
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Abstract
We introduce a Rydberg-based single photon detector (SPD) for probing dark matter in the 0.1-10 meV mass range (20 GHz-2 THz). The Rydberg SPD absorbs photons produced and focused by the BREAD dish antenna and trades them for free, detectable electrons. At the lower end of the mass range, photons drive Rydberg-Rydberg transitions, which are read out via state-selective ionization. At higher masses, they directly ionize the Rydberg atoms.