74 citations · 273 across the 11 of their papers we have counts for
8 papers · 1 filter
Testing Inflationary Cosmology
Robert J. Hardwick
In this thesis we will primarily demonstrate how additional scalar degrees of freedom - which are motivated from many high-energy embeddings - open up new observational windows ont…
Non-Gaussianity from Axion-Gauge Fields Interactions during Inflation
Emanuela Dimastrogiovanni, Matteo Fasiello, Robert J. Hardwick +3
We study the scalar-tensor-tensor non-Gaussian signal in an inflationary model comprising also an axion coupled with SU(2) gauge fields. In this set-up, metric fluctuations are sou…
The decisive future of inflation
Robert J. Hardwick, Vincent Vennin, David Wands
How much more will we learn about single-field inflationary models in the future? We address this question in the context of Bayesian design and information theory. We develop a no…
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…
A novel way to determine the scale of inflation
Kari Enqvist, Robert J. Hardwick, Tommi Tenkanen +2
We show that in the Feebly Interacting Massive Particle (FIMP) model of Dark Matter (DM), one may express the inflationary energy scale as a function of three otherwise unrel…
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…