In F-theory GUTs, non-universal ALPs induced by hypercharge flux satisfy g_aγ/m_a well below the QCD axion prediction when gauge couplings unify near the string scale.
The Monodromic Axion-Photon Coupling
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CMB polarization rotation can arise as a frequency-independent Pancharatnam phase when photons cross dark-sector vacuum interfaces, with no ultralight axion required.
A review deriving couplings, noise spectra, SNRs, and quantum techniques like squeezing for detectors in dark matter, GW, and mechanical sensor experiments.
citing papers explorer
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Testing F-theory GUTs with the Axiverse
In F-theory GUTs, non-universal ALPs induced by hypercharge flux satisfy g_aγ/m_a well below the QCD axion prediction when gauge couplings unify near the string scale.
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CMB Birefringence from Vacuum Interfaces
CMB polarization rotation can arise as a frequency-independent Pancharatnam phase when photons cross dark-sector vacuum interfaces, with no ultralight axion required.
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Quantum measurements in fundamental physics: a user's manual
A review deriving couplings, noise spectra, SNRs, and quantum techniques like squeezing for detectors in dark matter, GW, and mechanical sensor experiments.