# A Study of Universal Thermodynamics in Massive Gravity: Modified Entropy on the Horizons

## TL;DR

This paper investigates the thermodynamic properties of the universe within massive gravity theory, deriving modified entropy on horizons and analyzing the generalized second law and equilibrium conditions.

## Contribution

It introduces a modified entropy formulation for horizons in massive gravity and examines thermodynamic laws in this context.

## Key findings

- Modified entropy on horizons derived using unified first law
- Generalized second law holds under certain conditions
- Thermodynamical equilibrium analyzed for perfect fluid models

## Abstract

Universal thermodynamics for FRW model of the Universe bounded by apparent/event horizon has been considered for massive gravity theory. Assuming Hawking temperature and using the unified first law of thermodynamics on the horizon, modified entropy on the horizon has been determined. For simple perfect fluid with constant equation of state, generalized second law of thermodynamics and thermodynamical equilibrium have been examined on both the horizons.