775 citations · 7k across the 130 of their papers we have counts for
6 papers · 1 filter
The Quantum Phase of Inflation
Arjun Berera, Raghavan Rangarajan
Inflation models can have an early phase of inflation where the evolution of the inflaton is driven by quantum fluctuations before entering the phase driven by the slope of the sca…
Hybrid Quintessential Inflation
Mar Bastero-Gil, Arjun Berera, Brendan M. Jackson +1
A model is presented in which a single scalar field is responsible for both primordial inflation at early times and then dark energy at late times. This field is coupled to a secon…
Towards Realizing Warm Inflation in String Theory
Mar Bastero-Gil, Arjun Berera, James B. Dent +1
We give a generic argument that string theory provides a natural setting for warm inflationary cosmology. We then explore a specific model with an inflaton modulus field coupled to…
Gauge fixing, BRS invariance and Ward identities for randomly stirred flows
Arjun Berera, David Hochberg
The Galilean invariance of the Navier-Stokes equation is shown to be akin to a global gauge symmetry familiar from quantum field theory. This symmetry leads to a multiple counting…
Warm inflation model building
Mar Bastero-Gil, Arjun Berera
We review the main aspects of the warm inflation scenario, focusing on the inflationary dynamics and the predictions related to the primordial spectrum of perturbations, to be comp…
On the large-scale instability in interacting dark energy and dark matter fluids
Brendan M Jackson, Andy Taylor, Arjun Berera
Recently, Valiviita et al. (2008) have reported a large-scale early-time instability in coupled dark energy and dark matter models. We take the same form of energy-momentum exchang…