22 citations · 43 across the 5 of their papers we have counts for
7 papers
Trispectrum in Extended USR Model with Transition to SR
Hassan Firouzjahi, Amin Nassiri-Rad
We study the trispectrum in a two-phase USR-SR setup of inflation in which the USR stage is extended in the initial phase of inflation while the second stage of inflation proceeds…
Stochastic Inflation with Interacting Noises
Amin Nassiri-Rad, Haidar Sheikhahmadi, Hassan Firouzjahi
Stochastic formalism is a powerful tool to calculate the cosmological correlators non-perturbatively. However, it requires the initial data for the amplitude of the noise on t…
Stochastic Effects in Axion Inflation and Primordial Black Holes Formation
Alireza Talebian, Amin Nassiri-Rad, Hassan Firouzjahi
We revisit the model of axion inflation in the context of stochastic inflation and investigate the effects of the stochastic noises associated to the electromagnetic fields. Becaus…
Stochastic non-attractor inflation
Hassan Firouzjahi, Amin Nassiri-Rad, Mahdiyar Noorbala
We extend the formalism of stochastic inflation to the setup of non-attractor inflation with a sound speed . We obtain the Langevin equations for the superhorizon perturbation…
Revisiting Magnetogenesis during Inflation
Alireza Talebian, Amin Nassiri-Rad, Hassan Firouzjahi
We revisit the mechanism of primordial magnetogenesis during inflation by taking into account the dynamics of the stochastic noises of the electromagnetic perturbations. We obtain…
Stochastic Effects in Anisotropic Inflation
Alireza Talebian, Amin Nassiri-Rad, Hassan Firouzjahi
We revisit the stochastic effects in the model of anisotropic inflation containing a gauge field. We obtain the Langevin equations for the inflaton and gauge fields perturba…