8 citations · 17 across the 6 of their papers we have counts for
6 papers
Beyond isolated curvature peaks: collective collapse and multiple Primordial Black Hole formation
Albert Escrivà
Primordial black hole (PBH) calculations usually treat rare curvature peaks as isolated collapsing regions. Using fully nonlinear numerical-relativity simulations in a radiat…
The statistics of curvature-profile dispersion in primordial black hole formation
Albert Escrivà
In the standard curvature-perturbation scenario, PBHs form from the collapse of superhorizon curvature fluctuations after horizon re-entry. The predicted abundance is exponentially…
Gravitational wave emission from nonspherical collapse in an early matter-dominated era using N-body simulations
Albert Escrivà, Tomohiro Harada, Kazunori Kohri +2
We study the dynamics of the collapse of a nonspherical overdense patch during an early matter-dominated era and the associated production of gravitational waves (GWs) using a semi…
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…
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…
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…