Perturbations in Horndeski theory above anisotropic cosmological background
General Relativity and Quantum Cosmology
2024-03-27 v3 High Energy Physics - Theory
Abstract
Considering an anisotropic cosmological background is an interesting and simultaneously challenging problem of theoretical physics, since we not only assume a high degree of anisotropy in the early stages of the Universe, but also observe it to a small degree until now. In this paper we have constructed the unconstrained action for the perturbations above Bianchi I type background in the most general scalar-tensor theory of gravity, the Horndeski theory, and evaluate the effect of the deviation from the anisotropic background on the previously established stable solution obtained in previous works.
Keywords
Cite
@article{arxiv.2305.19171,
title = {Perturbations in Horndeski theory above anisotropic cosmological background},
author = {S. Mironov and A. Shtennikova},
journal= {arXiv preprint arXiv:2305.19171},
year = {2024}
}