42 citations · 290 across the 27 of their papers we have counts for
4 papers · 1 filter
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…
RG-Flow Renormalized One-Loop Corrections to the Power Spectrum in USR Inflation
Haidar Sheikhahmadi, Amin Nassiri-Rad
The nature of one-loop corrections to long-wavelength CMB-scale modes in single-field inflation models with an intermediate ultra-slow-roll (USR) phase remains a subject of active…
Constant-roll approach to non-canonical inflation
Abolhassan Mohammadi, Khaled Saaidi, Haidar Sheikhahmadi
The scenario of constant-roll inflation is studied where the inflaton is a scalar field with modified kinetic term, known as non-canonical scalar field. This modification leads to…
Interacting scalar tensor cosmology in light of SNeIa, CMB, BAO and OHD observational data sets
Sayed Wrya Rabiei, Haidar Sheikhahmadi, Khaled Saaidi +1
During this work, an interacting chameleon like scalar field scenario, by considering SNeIa, CMB, BAO and OHD data sets is investigated. In fact, the investigation is realized by i…