3 papers
astro-ph.CO2026
The Amplitude-Growth Degeneracy and Implied Diagnostic for Background-Inert Modified Gravity
Ameya Kolhatkar, P. K. Sahoo
We prove that any background-inert perturbative coupling in coincident gravity exhibits a degeneracy with the clustering amplitude , when using compressed…
gr-qc2026
Beyond the Cosmological Constant: Breaking the Geometric Degeneracy of cosmology via Redshift-Space Distortions
Ameya Kolhatkar, P. K. Sahoo
We present a rigorous theoretical and observational analysis of the Hybrid class of models by including the late-time modifying term. After deriving strict viabili…
gr-qc2024
Investigating early and late-time epochs in gravity
Ameya Kolhatkar, Sai Swagat Mishra, P. K. Sahoo
In the following work, a new hybrid model of the form has been proposed and confronted using both early as well as late-time constraints. We first…