5 papers
Universality Classes of Interacting Dark Energy from Spontaneous Symmetry Breaking
Pradosh Keshav MV, NS Kavya, Kenath Arun
Phenomenological models of interacting dark energy (IDE) often treat the late-time activation history of the dark sector coupling as an independent function. We show that in confor…
Spontaneous Symmetry Breaking as a Late-Time Trigger for Interacting Dark Energy
Pradosh Keshav MV, NS Kavya, Kenath Arun
Persistent tensions in the Hubble constant (H0) and the matter clustering parameter (S8) motivate late-time new physics that suppresses structure growth without significantly alter…
Loop-corrected scalar potentials and late-time acceleration in f(R) gravity
M. V. Pradosh Keshav, Arun Kenath
We construct an analytic f(R) gravity model that unifies early-time inflation with late-time cosmic acceleration within a single covariant framework. At high curvature, the model r…
Quintessence-Chameleon transitions in anisotropic Kiselev model of neutron stars
M. V. Pradosh Keshav, V. Jithesh, Kenath Arun
We investigate a chameleon scalar field dynamically interacting with a Kiselev-type metric, where the static anisotropic fluid part of the metric is replaced by a density-dependent…
Modification of Newtonian Gravity: Implications for Hot Gas in Clusters and Galactic Angular Momentum
Louise Rebecca, Dominic Sebastian, C Sivaram +1
In view of the negative results from various dark matter detection experiments, we had earlier proposed an alternate theoretical framework through Modification of Newtonian Gravity…