116 citations · 850 across the 19 of their papers we have counts for
10 papers · 1 filter
Bigravity and Horndeski gravity connected by a disformal coupling
Radouane Gannouji, Md. Wali Hossain, Nur Jaman +1
In this paper, we have studied bi-gravity theory in a very specific limit where we focused only on one degree of freedom generated by the massive graviton. We have analyzed the mod…
Quintessential inflation: A unified scenario of inflation and dark energy
Md. Wali Hossain
Quintessential inflation unifies inflation and late time acceleration by a single scalar field. Such a scenario, with canonical and non-canonical scalar fields, has been discussed…
First and second order cosmological perturbations in light mass Galileon models
Md. Wali Hossain
In this paper, we investigate the first and second order cosmological perturbations in the light mass Galileon (LMG) scenario. LMG action includes cubic Galileon term along with th…
Quintessential inflation with canonical and noncanonical scalar fields and Planck 2015 results
Chao-Qiang Geng, Md. Wali Hossain, R. Myrzakulov +2
We investigate two classes of models of quintessential inflation, based upon canonical as well as noncanonical scalar fields. In particular, introducing potentials steeper than the…
Unification of inflation and dark energy {\it à la} quintessential inflation
Md. Wali Hossain, R. Myrzakulov, M. Sami +1
This pedagogical review is devoted to quintessential inflation, which refers to unification of inflation and dark energy using a single scalar field. We present a brief but concise…
Evading Lyth bound in models of quintessential inflation
Md. Wali Hossain, R. Myrzakulov, M. Sami +1
Quintessential inflation refers to an attempt to unify inflation and late-time cosmic acceleration using a single scalar field. In this letter we consider two different classes of…
A class of quintessential inflation models with parameter space consistent with BICEP2
Md. Wali Hossain, R. Myrzakulov, M. Sami +1
In this paper, we focus on general features of quintessential inflation which is an effort to unify inflation and dark energy using a single scalar field. We describe a class of mo…
Variable gravity: A suitable framework for quintessential inflation
Md. Wali Hossain, R. Myrzakulov, M. Sami +1
In this paper, we investigate a scenario of variable gravity and apply it to the unified description of inflation and late time cosmic acceleration dubbed quintessential inflation.…
Quasi-dilaton non-linear massive gravity: Investigations of background cosmological dynamics
Radouane Gannouji, Md. Wali Hossain, M. Sami +1
We investigate cosmological behavior in the quasi-Dilaton non-linear massive gravity. We perform a detailed dynamical analysis and examine the stable late-time solutions relevant t…
Light mass galileons: Cosmological dynamics, mass screening and observational constraints
Amna Ali, Radouane Gannouji, Md. Wali Hossain +1
In this paper, we examine the cosmological viability of a light mass galileon field consistent with local gravity constraints. The minimal, L_3=\Boxϕ(\partial_μϕ)^2, massless galil…