74 citations · 273 across the 11 of their papers we have counts for
11 papers
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…
Renormalisation group improvement in the stochastic formalism
Robert J. Hardwick, Tommi Markkanen, Sami Nurmi
We investigate compatibility between the stochastic infrared (IR) resummation of light test fields on inflationary spacetimes and renormalisation group running of the ultra-violet…
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…
Multiple spectator condensates from inflation
Robert J. Hardwick
We investigate the development of spectator (light test) field condensates due to their quantum fluctuations in a de Sitter inflationary background, making use of the stochastic fo…
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…