6 papers
Cosmological discrete self-similarity in primordial black hole formation
Luis E. Padilla, Tomohiro Harada, Ethan Milligan +1
We demonstrate that discrete self-similarity (DSS), originally discovered in the collapse of a massless scalar field in an asymptotically flat system, survives in primordial black…
Decoupling of large-scale, adiabatic inflationary perturbations from enhanced small-scale modes at one-loop
Laura Iacconi, David Mulryne, David Seery
We reconsider back-reaction from large amplitude, short-scale perturbations onto a long wavelength adiabatic mode. In a loop expansion of the long-mode power spectrum, this back-re…
Primordial Black Hole Formation in a Scalar Field Dominated Universe: Investigation of the Critical nature of the Collapse
Luis E. Padilla, Ethan Milligan, David J. Mulryne +1
In this paper, we investigate the critical collapse leading to primordial black hole (PBH) formation in a universe dominated by a self-interacting scalar field with a quartic poten…
Suppression of the induced gravitational wave background due to third-order perturbations
Raphael Picard, Luis E. Padilla, Karim A. Malik +1
In this work, we revisit and evaluate new source terms which contribute to the induced gravitational wave background. We study their respective contributions to the stochastic grav…
Primordial Black Hole Formation in a Scalar Field Dominated Universe
Ethan Milligan, Luis E. Padilla, David J. Mulryne +1
We present a numerical code that solves the Misner-Sharp system for a spherically symmetric cosmological model containing both a scalar field and a perfect fluid. While the code is…
Primordial correlators from multi-point propagators
Andrea Costantini, Laura Iacconi, David J. Mulryne
A key step in the comparison between inflationary predictions and cosmological observations is the computation of primordial correlators. Numerical methods have been developed that…