4 papers · 1 filter
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,…
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…
Bulk viscous late acceleration under near equilibrium conditions in f(R, T) gravity with mixed matter
Vishnu A Pai, Titus K Mathew
Various studies have shown that the late acceleration of the universe can be caused by the bulk viscosity associated with dark matter. But recently, it was indicated that a cosmolo…
Near Equilibrium Constraints on Bulk Viscous Models in Gravity
Vishnu A Pai, Titus K Mathew
Recent studies indicate that, near equilibrium condition could not be maintained for bulk viscous matter models during the accelerated expansion of the universe in the context of E…