Accelerating Universe with a stable extra dimension in cuscuton gravity
General Relativity and Quantum Cosmology
2019-10-02 v1 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We study Kaluza-Klein cosmology in cuscuton gravity and find an exact solution describing an accelerating 4-dimensional universe with a stable extra dimension. A cuscuton which is a non-dynamical scalar field is responsible for the accelerating expansion and a vector field makes the extra dimensional space stable. Remarkably, the accelerating universe in our model is not exactly de Sitter.
Cite
@article{arxiv.1906.10363,
title = {Accelerating Universe with a stable extra dimension in cuscuton gravity},
author = {Asuka Ito and Yuki Sakakihara and Jiro Soda},
journal= {arXiv preprint arXiv:1906.10363},
year = {2019}
}
Comments
10 pages