3 papers
gr-qc2026
Twisting inflation to sub-Planckian axion decay constants
Peter Adshead, Suddhasattwa Brahma, Indranil Das
We study pseudoscalar inflation in the Einstein-Cartan-Palatini (first-order) formulation of gravity while allowing for torsion. We introduce two non-minimal interactions in the gr…
astro-ph.CO2025
Primordial Black Holes from Kinetic Preheating
Peter Adshead, Eve Currens, John T. Giblin
We demonstrate that violent kinetic preheating following inflation can lead to the formation of black holes in the early Universe. In -attractor models with derivative inflaton…
cond-mat.mes-hall2025
Mechanical cosmology: simulating scalar fluctuations in expanding Universes using synthetic mechanical lattices
Brendan Rhyno, Ivan Velkovsky, Peter Adshead +2
Inspired by recent advances in observational astrophysics and continued explorations in the field of analog gravity, we discuss the prospect of simulating models of cosmology withi…