32 citations · 76 across the 6 of their papers we have counts for
7 papers
Quasilocal conservation laws in cosmology: a first look
Marius Oltean, Hossein Bazrafshan Moghaddam, Richard J. Epp
Quasilocal definitions of stress-energy-momentum---that is, in the form of boundary densities (in lieu of local volume densities)---have proven generally very useful in formulating…
Energy of cosmological spacetimes and perturbations: a quasilocal approach
Marius Oltean, Hossein Bazrafshan Moghaddam, Richard J. Epp
Quasilocal definitions of stress-energy-momentum -- that is, in the form of boundary densities (rather than local volume densities) -- have proven generally very useful in formulat…
Note on Reheating in G-inflation
Hossein Bazrafshan Moghaddam, Robert Brandenberger, Jun'ichi Yokoyama
We study particle production at the end of inflation in kinetically driven G-inflation model and show that, in spite of the fact that there are no inflaton oscillations and hence n…
Preheating in an Asymptotically Safe Quantum Field Theory
Ole Svendsen, Hossein Bazrafshan Moghaddam, Robert Brandenberger
We consider reheating in a class of asymptotically safe quantum field theories recently studied in \cite{Litim:2014uca, Litim:2015iea}. These theories allow for an inflationary pha…
Preheating and Entropy Perturbations in Axion Monodromy Inflation
Evan McDonough, Hossein Bazrafshan Moghaddam, Robert H. Brandenberger
We study the preheating of gauge fields in a simple axion monodromy model and compute the induced entropy perturbations and their effect on the curvature fluctuations. We find that…
Preheating with Fractional Powers
Hossein Bazrafshan Moghaddam, Robert Brandenberger
We consider preheating in models in which the potential for the inflaton is given by a fractional power, as is the case in axion monodromy inflation. We assume a standard coupling…
Parametric Resonance of Entropy Perturbations in Massless Preheating
Hossein Bazrafshan Moghaddam, Robert H. Brandenberger, Yi-Fu Cai +1
Here, we revisit the question of possible preheating of entropy modes in a two field model with a massless inflaton coupled to a matter scalar field. Using a perturbative approxima…