Emergent scenario in mimetic gravity
Abstract
The emergent scenario provides a possible way to avoid the big bang singularity by assuming that the universe originates from an Einstein static state. Therefore, an Einstein static universe stable under perturbations is crucial to a successful implementation of the emergent mechanism. In this paper, we analyze the stability of the Einstein static universe against the scalar perturbations in the mimetic theory and find that stable Einstein static solutions exist under certain conditions in this theory. In the original mimetic gravity, the Einstein static universe is unstable. Then, we find that the universe can naturally exit from the initial static state, evolve into an inflationary era and then exit from the inflationary era. Thus, the emergent scenario can be used to resolve the big bang singularity in the mimetic theory.
Keywords
Cite
@article{arxiv.2202.04269,
title = {Emergent scenario in mimetic gravity},
author = {Qihong Huang and Bing Xu and He Huang and Feiquan Tu and Ruanjing Zhang},
journal= {arXiv preprint arXiv:2202.04269},
year = {2022}
}
Comments
Published in Classical and Quantum Gravity. arXiv admin note: text overlap with arXiv:1801.04358