Work

Four-dimensional Brane–Chern–Simons Gravity and Cosmology

Year: 2021

Type: article

Abstract: From the field equations corresponding to a four-dimensional brane embedded in the five-dimensional spacetime of the Einstein–Chern–Simons theory for gravity, we find cosmological solutions that describe an accelerated expansion for a flat universe. Apart from a quintessence-type evolution scheme, we obtain a transient phantom evolution, which is not ruled out by the current observational data. Additionally, a bouncing solution is shown. The introduction of a kinetic term in the action shows a de Sitter behavior although the energy density is not constant. A quintessence behavior is also found. We conjecture on a possible geometric origin of dark energy coming from this action.

Source: The European Physical Journal C

DOI: 10.1140/epjc/s10052-020-08804-z

Authors: F. Gómez, S. Lepe, P. Salgado

Institutions: Universidad de Los Lagos, Pontificia Universidad Católica de Valparaíso, Arturo Prat University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: diamond

Funders: Universidad de Los Lagos, Fondo Nacional de Desarrollo Científico y Tecnológico

Awards: G2434045665, G3209481181