3 papers
astro-ph.CO2026
Inflationary relics from an Ultra-Slow-Roll plateau
Albert Escrivà, Jaume Garriga, Shi Pi
We investigate the formation of primordial black holes (PBHs) in inflationary scenarios featuring an ultra-slow-roll (USR) plateau with a sharp transition to slow roll. We focus on…
astro-ph.CO2025
Threshold for PBH formation in the type-II region and its analytical estimation
Albert Escrivà
We numerically simulate the formation of Primordial Black Holes (PBHs) in a radiation-dominated Universe under the assumption of spherical symmetry, driven by the collapse of adiab…
astro-ph.CO2025
A new approach for simulating PBH formation from generic curvature fluctuations with the Misner-Sharp formalism
Albert Escrivà
Primordial Black Holes (PBHs) may have formed in the early Universe due to the collapse of super-horizon curvature fluctuations. Simulations of PBH formation have been essential fo…