3 papers
gr-qc2026
Subtleties in non-equilibrium horizon thermodynamics of modified gravity theories
Vishnu A Pai, Vishnu S Namboothiri, Titus K Mathew
Thermodynamic interpretations of gravity often arise from applying the Clausius relation to spacetime horizons. In modified gravity theories with higher-order equations of motion,…
gr-qc2025
Cosmology with non-linear barotropic Israel-Stewart fluid with causal relaxation time
Vishnu A Pai, Titus K Mathew
We derive an extended expression for the relaxation time of a barotropic Israel-Stewart (IS) fluid using the non-linear causality constraint, and propose a new formulation for mode…
astro-ph.CO2025
vCF: Extending CDM into a Unified Model with Particle Creation
Vishnu A Pai, Titus K Mathew
We present a novel extended version of the CDM model that provides analytical solution for Hubble parameter uniting all epochs of cosmic evolution starting from inflation to la…