161 citations · 430 across the 15 of their papers we have counts for
15 papers
Primordial cosmic complexity and effects of reheating
Pankaj Saha, Myeonghun Park
We study the effects of the reheating phase on the evolution of complexities for the primordial curvature perturbation using the squeezed formalism. We examine the evolution of the…
Exploration of Parameter Spaces Assisted by Machine Learning
A. Hammad, Myeonghun Park, Raymundo Ramos +1
We demonstrate two sampling procedures assisted by machine learning models via regression and classification. The main objective is the use of a neural network to suggest points li…
Detectable Gravitational Waves from preheating probes non-thermal Dark Matter
Anish Ghoshal, Pankaj Saha
We describe the challenges and pathways when probing inflaton as dark matter with the stochastic gravitational waves (GWs) signal generated during the (p)reheating. Such scenarios…
Model-independent constraints on inflation and reheating
Pankaj Saha
Reheating connects the inflationary universe to the radiation-dominated evolution of standard Big Bang cosmology. Due to the lack of direct observations, we rely on indirect bounds…
Two phase reheating: CMB constraints on inflaton and dark matter phenomenology
Md Riajul Haque, Debaprasad Maity, Pankaj Saha
We propose a two-phase reheating scenario where the initial preheating dynamics is described by an effective dynamics followed by the standard perturbative reheating. Some of the i…
PBHs and secondary GWs from ultra slow roll and punctuated inflation
H. V. Ragavendra, Pankaj Saha, L. Sriramkumar +1
[Abridged] The primordial scalar power spectrum is well constrained on large scales, primarily by the observations of the anisotropies in the cosmic microwave background (CMB). Ove…
Accounting for the time evolution of the equation of state parameter during reheating
Pankaj Saha, Sampurn Anand, L. Sriramkumar
One of the important parameters in cosmology is the parameter characterizing the equation of state (EoS) of the sources driving the cosmic expansion. Epochs that are dominated by r…
Einstein or Jordan: seeking answers from the reheating constraints
Debottam Nandi, Pankaj Saha
Distinguishing conformally coupled frames from the tree-level perturbative observables (scalar spectral index and tensor-to-scalar ratio ) is challenging in cosmolog…
Minimal plateau inflationary cosmologies and constraints from reheating
Debaprasad Maity, Pankaj Saha
With the growing consensus on simple power law inflation models not being favored by the PLANCK observations, dynamics for the non-standard inflation gain significant interest in t…
(P)reheating after minimal Plateau Inflation and constraints from CMB
Debaprasad Maity, Pankaj Saha
We have studied the preheating phase for a class of plateau inflationary model considering the four-legs interaction term between the inflaton and reheating…
CMB constraints on dark matter phenomenology via reheating in minimal plateau inflation
Debaprasad Maity, Pankaj Saha
We consider the CMB constraints on reheating and dark matter parameter space for a specific plateau type inflationary model. The plateau inflationary models which are currently mos…
Studying G-axion Inflation model in light of PLANCK
Debaprasad Maity, Pankaj Saha
With the Planck 2015 result, most of the well known canonical large field inflation models turned out to be strongly disfavored. Axion inflation is one of such models which is beco…
Connecting CMB anisotropy and cold dark matter phenomenology via reheating
Debaprasad Maity, Pankaj Saha
Understanding the properties of dark matter has proved to be one of the most challenging problems of particle phenomenology. In this paper, we have tried to understand the phenomen…
Minimal inflationary cosmologies and constraints on reheating
Debaprasad Maity, Pankaj Saha
With the growing consensus on simple power law inflation models not being favored by the PLANCK observation, dynamics for the non-standard form of the inflaton potential gain signi…
Modified natural inflation: A small single field model with a large tensor to scalar ratio
Debaprasad Maity, Pankaj Saha
In this paper we explored in detail a phenomenological model of modified single field natural inflation in light of recent cosmological experiments, BICEP2. Our main goal is to con…