2608.19146Aug 19, 20265 pages

On entropic cosmology, late time acceleration and the quantum bounce

Luis Rey Diaz-Barron, G. E. Pérez-Cuéllar, M. Sabido

General Relativity and Quantum Cosmology

Abstract

In this work, we present a unified entropic description of the quantum bounce that is present in Loop Quantum Cosmology (LQG) and dark energy that drives the late time acceleration of the Universe. By considering a minimal area $A_0$ for the Universe and a modified entropy area constructed as the sum of $S_Q$ , $S_{BH}$

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and

S_{DE}

, we derive the Friedmann equations. We show that in the limit

A\sim A_0

, there is a critical density that generates the quantum bounce and depends on the minimal area. Moreover, in the limit

A\gg A_0

(large Universe) the late time dynamics gives an accelerating scale factor. Therefore, we can argue an entropic origin for the quantum bounce and dark energy.

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On entropic cosmology, late time acceleration and the quantum bounce

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