A Study of Universal Thermodynamics in Lanczos-Lovelock gravity
Saugata Mitra, Subhajit Saha, Subenoy Chakraborty
TL;DR
This paper investigates the thermodynamic properties of the universe within Lanczos-Lovelock gravity, focusing on horizon entropy modifications and the validity of thermodynamic laws across different cosmic fluid models.
Contribution
It introduces a modified Bekenstein entropy for horizons and examines thermodynamic laws in Lanczos-Lovelock gravity with various cosmic fluids.
Findings
Modified Bekenstein entropy on horizons.
Generalized second law holds for studied models.
Thermodynamic equilibrium conditions are analyzed.
Abstract
A study of Universal thermodynamics is done in Lanczos-Lovelock gravity. The Universe is chosen as FRW model bounded by apparent or event horizon. The unified first law is examined, assuming extended Hawking temperature on the horizon. As a result there is a modification of Bekenstein entropy on the horizons. Further the validity of generalized second law of thermodynamics and thermodynamical equilibrium are also investigated for perfect fluid (with constant equation of state), modified chaplygin gas model and holographic dark energy model.
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