Work

On entropic cosmology, late-time acceleration and the quantum bounce

Year: 2026

Type: article

Abstract: In this work, an entropic description of the evolution of the Universe is presented. This description incorporates the quantum bounce, present in Loop Quantum Cosmology (LQG), and a dark energy-type behavior that drives the late-time acceleration of the Universe. By considering a minimum area, A 0 , for the Universe and a modified entropy as a function of the area, constructed as the sum of S Q , S BH and S DE , we derive the Friedmann equations. We show that in the limit A ∼ A 0 , there is a critical density that generates the quantum bounce and depends on the minimum area. Moreover, in the limit A ≫ 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.

Source: Physics Letters B

DOI: 10.1016/j.physletb.2026.141043

Authors: Luis Rey Díaz-Barrón, G.E. Pérez-Cuéllar, M. Sabido

Institutions: Instituto Politécnico Nacional, Universidad de Guanajuato, University of the Basque Country

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Instituto Politécnico Nacional, Consejo Nacional de Ciencia y Tecnología, Universidad de Guanajuato, Secretaría de Investigación y Posgrado, Instituto Politécnico Nacional

Award: G9000999485