4 papers
Post-Recombination Fluctuations from a Sequestered Dark Sector
Salvatore Bottaro, Michael Geller, Diego Redigolo +1
We develop a formalism to characterize the imprints of late-time sources of cosmological fluctuations under the sole assumption that the injection occurs on timescales short compar…
Dissipative Losses In Black Hole-Induced Vacuum Decay
Michael Geller, Ofri Telem
We address the long-standing puzzle of false vacuum decay catalyzed by black holes. Naively, small black holes with large Hawking temperatures can generate highly-boosted true vacu…
Ultralight Dilatonic Dark Matter
Abhishek Banerjee, Csaba Csáki, Michael Geller +2
The dilaton, a pseudo-Nambu-Goldstone boson (pNGB) of broken scale invariance, is an appealing ultralight dark matter (DM) candidate. Its mass is protected by conformal invariance…
Natural Ultralight Dark Matter: The Quadratic Twin
Cédric Delaunay, Michael Geller, Zamir Heller-Algazi +2
Scalar ultralight dark matter (ULDM) is uniquely accessible to tabletop experiments such as clocks and interferometers, and its search has been the focus of a vast experimental eff…