Contribution Of Blackhole Entropy Towards Acceleration Of The Universe

TL;DR

This paper explores how black hole entropy influences cosmic acceleration by superimposing black hole entropy-generated pressure onto a collapsing matter model, affecting the universe's expansion rate.

Contribution

It introduces a novel approach by incorporating black hole entropy into cosmological models to explain universe acceleration, extending previous pressure-based models.

Findings

Hubble parameter remains positive throughout the evolution.

Deceleration parameter fluctuates, indicating alternating acceleration and deceleration periods.

Black hole entropy contributes significantly to the universe's acceleration dynamics.

Abstract

In a recent model Choudhury proposed that a collapsing matter generates an adiabatic pressure which can be used to explain the acceleration of the physical universe under certain approximation. In this work we superimpose the core pressure generated through the entropy of the blackhole. We have ignored the blackhole internal energy change during this process. We have then calculated both Hubble parameter and the deacceleration parameter. We have shown that the Hubble parameter is positive and the deacceleration parameter fluctuates with time, meaning for certain period the universe accelerates and decelerates for other time.