5 papers
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…