8 citations · 14 across the 13 of their papers we have counts for
13 papers
Formalizing a unified dynamical system framework for and gravity
Saikat Chakraborty
Going beyond the traditional Hubble-normalized framework, we formalize a unified dynamical system formulation for and coincident gauge gravity using three distinct se…
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…
Beyond : Observational Constraints on Almost-CDM Cosmologies
Jess Worsley, Saikat Chakraborty, Peter Dunsby
The cosmographic condition provides the kinematical signature of the spatially flat CDM model independently of any specific dark-energy or modified-gravity theory. We i…
Reconstructing the slope of a nearly flat quintessence potential from cosmography
Saikat Chakraborty, Peter K. S. Dunsby, Robert J. Scherrer
We revisit thawing quintessence models with nearly flat scalar-field potentials using a cosmographic framework. Earlier work indicates that the cosmographic reconstruction of the s…
Constraining Scale-Dependent Growth in Gravity with Future 21 cm Surveys
Apurba Samanta, Bhuwan Joshi, Jess Worsley +2
Recent observations, particularly from DESI, have provided intriguing hints of dynamical behaviour in late-time dark energy. Modified gravity theories offer a compelling framework…
Direct cosmographic reconstruction of the quintessence potential
Saikat Chakraborty, Peter K. S. Dunsby, Robert J. Scherrer
We derive expressions for the first and second derivatives of the quintessence potential , in terms of and , as fu…
Dynamical dark energy in models with evolution close to CDM
Saikat Chakraborty, Charlotte Louw, Peter K. S. Dunsby +2
In this communication we address whether or not there is an equivalence between the kinematical and dynamical descriptions of the spatially flat CDM model. We address this by in…
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…
A generic dynamical system formulation for Bianchi-I cosmology with isotropic fluid in gravity
Ghulam Murtaza, Saikat Chakraborty, Avik De
In this article, we present a generic dynamical system formulation for Bianchi-I cosmology in the presence of an isotropic fluid within the coincident gauge connection branch and o…
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…
A model independent approach to the study of structure growth in gravity
Kelly MacDevette, Jess Worsley, Peter Dunsby +1
Over the last decade, much attention has been given to the study of modified gravity theories to find a more natural explanation for the late-time acceleration of the Universe. Par…
A dynamical systems formulation for inhomogeneous LRS-II spacetimes
Saikat Chakraborty, Peter K. S. Dunsby, Rituparno Goswami +1
We present a dynamical system formulation for inhomogeneous LRS-II spacetimes using the covariant 1+1+2 decomposition approach. Our approach describes the LRS-II dynamics from the…
A model-independent compact dynamical system formulation for exploring bounce and cyclic cosmological evolutions in gravity
A. S. Agrawal, Charlotte Louw, Saikat Chakraborty +1
Using the dynamical systems approach together with the cosmographic parameters, we present a model-independent dynamical system formulation for cosmology in f(R) gravity. The formu…