236 citations · 793 across the 11 of their papers we have counts for
4 papers · 1 filter
PBH in single field inflation: the effect of shape dispersion and non-Gaussianities
Vicente Atal, Judith Cid, Albert Escrivà +1
Primordial black holes (PBHs) may result from high peaks in a random field of cosmological perturbations. In single field inflationary models, such perturbations can be seeded as t…
Tunneling vortex dynamics in linearly coupled Bose-Hubbard rings
Albert Escrivà, Antonio Muñoz Mateo, Montserrat Guilleumas +1
The quantum dynamics of population-balanced fractional vortices and population-imbalanced vortices in an effective two-state bosonic system, made of two coupled discrete circuits w…
A universal threshold for primordial black hole formation
Albert Escrivà, Cristiano Germani, Ravi K. Sheth
In this letter, we argue and show numerically that the threshold to form primordial black holes from an initial spherically symmetric perturbation is, to an excellent approximation…
Simulation of primordial black hole formation using pseudo-spectral methods
Albert Escrivà
In this work we have used for the first time pseudo-spectral methods to perform numerical simulations of spherically symmetric black hole formations on a Friedman-Robertson-Walker…