181 citations · 254 across the 4 of their papers we have counts for
4 papers
Fluctuation-dissipation dynamics of cosmological scalar fields
Sam Bartrum, Arjun Berera, Joao G. Rosa
We show that dissipative effects have a significant impact on the evolution of cosmological scalar fields, leading to friction, entropy production and field fluctuations. We explic…
The importance of being warm (during inflation)
Sam Bartrum, Mar Bastero-Gil, Arjun Berera +3
The amplitude of primordial curvature perturbations is enhanced when a radiation bath at a temperature T>H is sustained during inflation by dissipative particle production, which i…
Warming up for Planck
Sam Bartrum, Arjun Berera, Joao G. Rosa
The recent Planck results and future releases on the horizon present a key opportunity to address a fundamental question in inflationary cosmology of whether primordial density per…
Gravitino cosmology in supersymmetric warm inflation
Sam Bartrum, Arjun Berera, Joao G. Rosa
In supersymmetric models of warm inflation, the large temperature of the radiation bath produced by the dissipative motion of the inflaton field may induce a significant thermal ab…