7 papers
Density contrast in the scalar-tensor extension of non-metricity gravity
Ganesh Subramaniam, Avik De, Jackson Levi Said
We present a novel derivation of scalar cosmological perturbations in the scalar-tensor extension of non-metricity gravity, where the non-metricity scalar is non-minimally coup…
Cosmological Scenarios in gravity with a dynamical degree of freedom
Hamid Shabani, Avik De
The theory, which extends symmetric teleparallel gravity by including the boundary term in addition to the non-metricity scalar , provides a unifying framework that…
Exact cosmological solutions in non-coincidence -theory
Avik De, Andronikos Paliathanasis
We study exact cosmological solutions in gravity formulated beyond the coincident gauge, focusing on the non-coincident connection branch . Using a minisuperspace appro…
Can an Extra Degree of Freedom in Scalar-Tensor Non-Metricity Gravity Account for the Evolution of the Universe?
Ghulam Murtaza, Avik De, Andronikos Paliathanasis +1
We investigate whether the extra scalar degree of freedom that arises in the second connection class of scalar-tensor non-metricity gravity can accurately replicate and potentially…
Phase-space analysis of an anisotropic universe in gravity
Ghulam Murtaza, Avik De, Tee-How Loo +2
In this study, we analyze the anisotropic universe in gravity theory. To achieve this, we consider three specific models of gravity and rewrite the equations of m…
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…