742 citations · 5.3k across the 66 of their papers we have counts for
5 papers · 1 filter
Measuring the duration of inflation with the curvaton
Jesus Torrado, Christian T. Byrnes, Robert J. Hardwick +2
Simple models of single-field inflation in the very early universe can generate the observed amplitude and scale dependence of the primordial density perturbation, but models with…
Can power spectrum observations rule out slow-roll inflation?
J. P. P. Vieira, Christian T. Byrnes, Antony Lewis
The spectral index of scalar perturbations is an important observable that allows us to learn about inflationary physics. In particular, a detection of a significant deviation from…
3D simulations with boosted primordial power spectra and ultracompact minihalos
Mateja Gosenca, Julian Adamek, Christian T. Byrnes +1
We perform three-dimensional simulations of structure formation in the early Universe, when boosting the primordial power spectrum on approximately kpc scales. We demonstrate that…
Extreme scenarios: the tightest possible constraints on the power spectrum due to primordial black holes
Philippa S. Cole, Christian T. Byrnes
Observational constraints on the abundance of primordial black holes (PBHs) constrain the allowed amplitude of the primordial power spectrum on both the smallest and the largest ra…
The stochastic spectator
Robert J. Hardwick, Vincent Vennin, Christian T. Byrnes +2
We study the stochastic distribution of spectator fields predicted in different slow-roll inflation backgrounds. Spectator fields have a negligible energy density during inflation…