Improved DHOST Genesis
General Relativity and Quantum Cosmology
2021-11-23 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
We improve the DHOST Genesis proposed in \cite{Ilyas:2020zcb}, such that the near scale invariant scalar power spectrum can be generated from the model itself, without involking extra mechanism like a string gas. Besides, the superluminality problem of scalar perturbation plagued in \cite{Ilyas:2020zcb} can be rescued by choosing proper DHOST action.
Cite
@article{arxiv.2109.05277,
title = {Improved DHOST Genesis},
author = {Mian Zhu and Yunlong Zheng},
journal= {arXiv preprint arXiv:2109.05277},
year = {2021}
}
Comments
7 pages, 3 figures, version accepted for publication in JHEP