Primordial Cosmology in Mimetic Born-Infeld Gravity
General Relativity and Quantum Cosmology
2017-12-13 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
The Eddington-inspired-Born-Infeld (EiBI) model is reformulated within the mimetic approach. In the presence of a mimetic field, the model contains non-trivial vacuum solutions which could be free of spacetime singularity because of the Born-Infeld nature of the theory. We study a realistic primordial vacuum universe and prove the existence of regular solutions, such as primordial inflationary solutions of de Sitter type or bouncing solutions. Besides, the linear instabilities present in the EiBI model are found to be avoidable for some interesting bouncing solutions in which the physical metric as well as the auxiliary metric are regular at the background level.
Keywords
Cite
@article{arxiv.1709.09192,
title = {Primordial Cosmology in Mimetic Born-Infeld Gravity},
author = {Mariam Bouhmadi-López and Che-Yu Chen and Pisin Chen},
journal= {arXiv preprint arXiv:1709.09192},
year = {2017}
}
Comments
18 pages, 2 figures and 1 table. References added. Version accepted in JCAP