47 citations · 243 across the 11 of their papers we have counts for
9 papers · 1 filter
Effect of reheating on predictions following multiple-field inflation
Selim C. Hotinli, Jonathan Frazer, Andrew H. Jaffe +3
We study the sensitivity of cosmological observables to the reheating phase following inflation driven by many scalar fields. We describe a method which allows semi-analytic treatm…
Implications of the CMB power asymmetry for the early universe
Christian T. Byrnes, Donough Regan, David Seery +1
Observations of the microwave background fluctuations suggest a scale-dependent amplitude asymmetry of roughly 2.5 sigma significance. Inflationary explanations for this 'anomaly'…
The hemispherical asymmetry from a scale-dependent inflationary bispectrum
Christian T. Byrnes, Donough Regan, David Seery +1
If the primordial bispectrum is sufficiently large then the CMB hemispherical asymmetry may be explained by a large-scale mode of exceptional amplitude which perturbs the zeta two-…
Perturbative Reheating After Multiple-Field Inflation: The Impact on Primordial Observables
Joel Meyers, Ewan R. M. Tarrant
We study the impact of perturbative reheating on primordial observables in models of multiple-field inflation. By performing a sudden decay calculation, we derive analytic expressi…
The Dark Energy Cosmic Clock: A New Way to Parametrise the Equation of State
Ewan R. M. Tarrant, Edmund J. Copeland, Antonio Padilla +1
We propose a completely new parametrisation of the dark energy equation of state, which uses the dark energy density, as a cosmic clock. We expand the equation of state in a…
Cosmological effects of coupled dark matter
Sophie C. F. Morris, Anne M. Green, Antonio Padilla +1
Many models have been studied that contain more than one species of dark matter and some of these couple the Cold Dark Matter (CDM) to a light scalar field. In doing this we introd…
Influence of Reheating on the Trispectrum and its Scale Dependence
Godfrey Leung, Ewan R. M. Tarrant, Christian T. Byrnes +1
We study the evolution of the non-linear curvature perturbation during perturbative reheating, and hence how observables evolve to their final values which we may compare against o…
Reheating, Multifield Inflation and the Fate of the Primordial Observables
Godfrey Leung, Ewan R. M. Tarrant, Christian T. Byrnes +1
We study the effects of perturbative reheating on the evolution of the curvature perturbation ζ, in two-field inflation models. We use numerical methods to explore the sensitivity…
Coupled Quintessence and the Halo Mass Function
Ewan R. M. Tarrant, Carsten van de Bruck, Edmund J. Copeland +1
A sufficiently light scalar field slowly evolving in a potential can account for the dark energy that presently dominates the universe. This quintessence field is expected to coupl…