201 citations · 1.8k across the 54 of their papers we have counts for
54 papers
Stochastic Inflation in Numerical Relativity
Yoann L. Launay, Gerasimos I. Rigopoulos, E. Paul S. Shellard
A set of 3+1 equations for stochastic inflation incorporating all metric and scalar matter degrees of freedom, first presented in previous work, are re-derived in a gauge invariant…
Inflaton perturbations through an Ultra-Slow Roll transition and Hamilton-Jacobi attractors
Tomislav Prokopec, Gerasimos Rigopoulos
We examine the behaviour of the gauge invariant scalar field perturbations in an analytic inflationary model that transitions from slow-roll to an ultra-slow-roll (USR) phase. We f…
Fuzzy dark matter halos with repulsive self-interactions: coherent soliton and halo vortex network with moderate self-coupling
Milos Indjin, Nick Keepfer, I-Kang Liu +2
We examine the impact of moderate repulsive self-interactions on fuzzy dark matter halos generated by merging smaller Gaussian density concentrations. We study the size of the core…
Bunch-Davies initial conditions and non-perturbative inflationary dynamics in Numerical Relativity
Yoann L. Launay, Gerasimos I. Rigopoulos, E. Paul S. Shellard
We show that it is possible to simulate realistic inhomogeneities during cosmological inflation with high precision using {Numerical Relativity}. Stochastic initial conditions are…
Dynamical reconstruction of SPARC galactic halos within self-interacting fuzzy dark matter
Milos Indjin, I-Kang Liu, Nick P. Proukakis +2
Fuzzy Dark Matter with non-zero quartic self-interaction (SFDM) is shown to be a viable model for simultaneously fitting 17 dark-matter-dominated galaxies from the SPARC database w…
Quantitative classicality in cosmological interactions during inflation
Yoann L. Launay, Gerasimos I. Rigopoulos, E. Paul S. Shellard
We examine the classical and quantum evolution of inflationary cosmological perturbations from quantum initial conditions, using the on-shell and off-shell contributions to correla…