470 citations · 2.1k across the 46 of their papers we have counts for
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Quenching Mechanisms of Photon Superradiance
Diego Blas, Samuel J. Witte
Rapidly rotating black holes are known to develop instabilities in the presence of a sufficiently light boson, a process which becomes efficient when the boson's Compton wavelength…
Imprints of Axion Superradiance in the CMB
Diego Blas, Samuel J. Witte
Light axions ( eV) can form dense clouds around rapidly rotating astrophysical black holes via a mechanism known as rotational superradiance. The coupling be…
Could the Hubble Tension be Pointing Towards the Neutrino Mass Mechanism?
Miguel Escudero, Samuel J. Witte
Local measurements of the Hubble constant currently disagree with the high-precision value that is inferred from the CMB under the assumption of a CDM cosmology. The significanc…
Variations in fundamental constants at the cosmic dawn
Laura Lopez-Honorez, Olga Mena, Sergio Palomares-Ruiz +2
The observation of space-time variations in fundamental constants would provide strong evidence for the existence of new light degrees of freedom in the theory of Nature. Robustly…
Dark Photon Dark Matter in the Presence of Inhomogeneous Structure
Samuel J. Witte, Salvador Rosauro-Alcaraz, Samuel D. McDermott +1
Dark photon dark matter will resonantly convert into visible photons when the dark photon mass is equal to the plasma frequency of the ambient medium. In cosmological contexts, thi…