311 citations · 938 across the 22 of their papers we have counts for
22 papers · 1 filter
Exact Integrable CDM-Mimicking Cosmology: Background, Stability, and Perturbations in the First Connection Branch
Wompherdeiki Khyllep, Daniele Gregoris, Saikat Chakraborty +1
We re-examine the problem of mimicking the standard cosmological model, characterized by (where is the cosmographic jerk parameter), within the context of the first conne…
A Unified Dynamical Systems Framework for Cosmology in Gravity: Generic Features Beyond the Coincident Gauge
Jibitesh Dutta, Wompherdeiki Khyllep, Saikat Chakraborty +2
We present a unified dynamical systems framework for spatially flat FLRW cosmology in gravity, covering all three connection branches via a single set of Hubble-normalised v…
Reproducing CDM-like Solutions in Gravity: A Comprehensive Study Across All Connection Branches
Saikat Chakraborty, Jibitesh Dutta, Daniele Gregoris +2
Given the remarkable success of the CDM model in fitting various cosmological observations, a pertinent question in assessing the phenomenological viability of modified gravity…
Modelling the Accelerating Universe with Gravity: Observational Consistency
S. A. Narawade, S. H. Shekh, B. Mishra +2
In this paper, we present a cosmological model within the framework of symmetric teleparallel gravity, focusing on gravity, where represents the non-metricity scalar. Ut…
Global phase space analysis for a class of single scalar field bouncing solutions in general relativity
A. S. Agrawal, Saikat Chakraborty, B. Mishra +2
We carry out a compact phase space analysis of a non-canonical scalar field theory whose Lagrangian is of the form within general relativity. In particular, we focus on…
Cosmology in gravity: A unified dynamical system analysis at background and perturbation levels
Wompherdeiki Khyllep, Jibitesh Dutta, Emmanuel N. Saridakis +1
Motivated by the fact that cosmological models based on gravity are very efficient in fitting observational datasets at both background and perturbation levels, we perform a…
Background evolution and growth of structures in interacting dark energy through dynamical system analysis
Wompherdeiki Khyllep, Jibitesh Dutta, Spyros Basilakos +1
We apply the formalism of dynamical system analysis to investigate the evolution of interacting dark energy scenarios at the background and perturbation levels in a unified way. Si…
Interacting quintessence in light of Generalized Uncertainty Principle: Cosmological perturbations and dynamics
Andronikos Paliathanasis, Genly Leon, Wompherdeiki Khyllep +2
We consider a cosmological scenario endowed with an interaction between the universe's dark components dark matter and dark energy. Specifically, we assume the dark matter comp…
Cosmological solutions and growth index of matter perturbations in gravity
Wompherdeiki Khyllep, Andronikos Paliathanasis, Jibitesh Dutta
The present work studies one of Einstein's alternative formulations based on the non-metricity scalar generalized as theory. More specifically, we consider the power-law…
Cosmological dynamics and bifurcation analysis of the general non-minimally coupled scalar field models
Wompherdeiki Khyllep, Jibitesh Dutta
Non-minimally coupled scalar field models are well-known for providing interesting cosmological features. These include a late time dark energy behavior, a phantom dark energy evol…
From inflation to dark energy in scalar-tensor cosmology
Jibitesh Dutta, Laur Jarv, Wompherdeiki Khyllep +1
The methods of dynamical systems have found wide applications in cosmology, with focus either upon inflation or upon the passage into dark energy era. In this paper, we endeavor to…
Thermodynamics of scalar field models with kinetic corrections
Binod Chetry, Jibitesh Dutta, Wompherdeiki Khyllep
In the present work, we compare the thermodynamical viability of two types of non-canonical scalar field models with kinetic corrections: the square kinetic and square root kinetic…
Linear growth index of matter perturbations in Rastall gravity
Wompherdeiki Khyllep, Jibitesh Dutta
Rastall gravity theory shows notable features consistent with physical observations in comparison to the standard Einstein theory. Recently, there has been a debate about the equiv…
Cosmological dynamics of the general non-canonical scalar field models
Jibitesh Dutta, Wompherdeiki Khyllep, Hmar Zonunmawia
We extend the investigation of cosmological dynamics of the general non-canonical scalar field models by dynamical system techniques for a broad class of potentials and coupling fu…
Cosmological dynamics of brane gravity: A global dynamical system perspective
Hmar Zonunmawia, Wompherdeiki Khyllep, Jibitesh Dutta +1
The braneworld model of gravity is well-known for several notable cosmological features such as self-acceleration originating from a geometric and not matter source, effective dark…
Cosmological dynamics of mimetic gravity
Jibitesh Dutta, Wompherdeiki Khyllep, Emmanuel N. Saridakis +2
We present a detailed investigation of the dynamical behavior of mimetic gravity with a general potential for the mimetic scalar field. Performing a phase-space and stability analy…
Extended Phase Space Analysis of Interacting Dark Energy Models in Loop Quantum Cosmology
Hmar Zonunmawia, Wompherdeiki Khyllep, Nandan Roy +2
The present work deals with the dynamical system investigation of interacting dark energy models (quintessence and phantom) in the framework of Loop Quantum Cosmology by taking int…
Dark energy with a gradient coupling to the dark matter fluid: cosmological dynamics and structure formation
Jibitesh Dutta, Wompherdeiki Khyllep, Nicola Tamanini
We consider scalar field models of dark energy interacting with dark matter through a coupling proportional to the contraction of the four-derivative of the scalar field with the f…
Scalar-Fluid interacting dark energy: cosmological dynamics beyond the exponential potential
Jibitesh Dutta, Wompherdeiki Khyllep, Nicola Tamanini
We extend the dynamical systems analysis of Scalar-Fluid interacting dark energy models performed in C. G. Boehmer et al, Phys. Rev. D 91, 123002 (2015), by considering scalar fiel…
Dynamical analysis of interacting dark energy model in the framework of particle creation mechanism
Sujay Kr. Biswas, Wompherdeiki Khyllep, Jibitesh Dutta +1
In this work we present the cosmological dynamics of interacting dark energy models in the framework of particle creation mechanism. The particle creation mechanism presented here…
Late time accelerated scaling attractors in DGP (Dvali-Gabadadze-Porrati) braneworld
Jibitesh Dutta, Wompherdeiki Khyllep, Erickson Syiemlieh
In the evolution of late universe, the main source of matter are Dark energy and Dark matter. They are indirectly detected only through their gravitational manifestations. So the p…
Cosmological dynamics of scalar fields with kinetic corrections: Beyond the exponential potential
Jibitesh Dutta, Wompherdeiki Khyllep, Nicola Tamanini
We expand the dynamical systems investigation of cosmological scalar fields characterised by kinetic corrections presented in [N. Tamanini, Phys. Rev. D 89 (2014) 083521]. In parti…