3 papers
hep-th2026
Wilsonian Cosmology: de Sitter (in)Stability
Jean Alexandre, Lucien Heurtier, Silvia Pla
We develop a (Wilsonian) functional-renormalisation-group framework for scalar cosmology in which quantum fluctuations of a scalar field are coarse-grained on cosmological spacelik…
astro-ph.CO2025
Effect of the Memory Burden on Primordial Black Hole Hot Spots
Nathaniel Levy, Lucien Heurtier
When primordial black holes (PBHs) evaporate, they deposit energy in the surrounding plasma, leading to temperature gradients, or hot spots, that evolve during the evaporation proc…
hep-th2025
Exact Renormalisation Group Evolution of the Inflation Dynamics: Reconciling -Attractors with ACT
Jean Alexandre, Lucien Heurtier, Silvia Pla
We present a non-perturbative framework for the dynamics of slow-roll inflation that consistently incorporates quantum corrections, based on an alternative functional renormalisati…