116 citations · 850 across the 19 of their papers we have counts for
19 papers
21 cm power spectrum in interacting cubic Galileon model
Bikash R. Dinda, Md. Wali Hossain, Anjan A. Sen
We show the detectability of interacting and non-interacting cubic Galileon models from the CDM model through the 21 cm power spectrum. We show that the interferometric observat…
Consistency of Cubic Galileon Cosmology: Model-Independent Bounds from Background Expansion and Perturbative Analyses
Suddhasattwa Brahma, Md. Wali Hossain
We revisit the cosmological dynamics of the cubic Galileon model in light of the recently proposed model-independent analyses of the Pantheon supernova data. At the background leve…
A study on Cubic Galileon Gravity Using N-body Simulations
Jiajun Zhang, Bikash R. Dinda, Md. Wali Hossain +2
We use N-body simulation to study the structure formation in the Cubic Galileon Gravity model where along with the usual kinetic and potential term we also have a higher derivative…
Relating the scalar weak gravity conjecture and the swampland distance conjecture for an accelerating universe
Suddhasattwa Brahma, Md. Wali Hossain
For any quasi de Sitter background, we show that a recently proposed scalar weak gravity conjecture (sWGC) follows from the swampland distance conjecture, together with the covaria…
Dark energy beyond quintessence: Constraints from the swampland
Suddhasattwa Brahma, Md. Wali Hossain
The string theory swampland proposes that there is no UV-completion for an effective field theory with an exact (metastable) de Sitter vacua, thereby ruling out standard CDM cos…
Avoiding the string swampland in single-field inflation: Excited initial states
Suddhasattwa Brahma, Md. Wali Hossain
One class of single-field inflationary models compatible with the recently-conjectured Swampland criteria would be those in which a Hubble slow-roll parameter is not t…
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…
Observed galaxy power spectrum in cubic Galileon model
Bikash R. Dinda, Md. Wali Hossain, Anjan A Sen
In this paper, we study the effects of general relativistic corrections on the observed galaxy power spectrum in thawing class of cubic Galileon model with linear potential that pr…
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.…
Cosmological investigations of (extended) nonlinear massive gravity schemes with non-minimal coupling
K. Bamba, Md. Wali Hossain, R. Myrzakulov +2
In this paper we investigate the case of non-minimal coupling in the (extended) nonlinear massive gravity theories. We first consider massive gravity in the Brans-Dicke background…
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…
Do Observations Favour Galileon Over Quintessence?
Md. Wali Hossain, Anjan A. Sen
We study the Galileon scalar field model arising as a decoupling limit of the Dvali-Gababdaze-Porrati (DGP) construction for the late time acceleration of the universe. The model h…