Revisiting $f(R)$ gravity's rainbow: Inflation and primordial fluctuations
General Relativity and Quantum Cosmology
2023-04-13 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We study inflation and the generation of primordial fluctuations in gravity's rainbow. We calculate the cosmological perturbations and then the scalar and tensor primordial power spectrum. We contrast the predictions of the model with the current observational data from PLANCK and BICEP/Keck. Particularly, we found new results for the scalar spectral index and the tensor-to-scalar ratio along with new observational constraints on the rainbow functions.
Keywords
Cite
@article{arxiv.2206.09000,
title = {Revisiting $f(R)$ gravity's rainbow: Inflation and primordial fluctuations},
author = {Yoelsy Leyva and Giovanni Otalora},
journal= {arXiv preprint arXiv:2206.09000},
year = {2023}
}
Comments
18 pages, 4 figures. Updated to match the published version in JCAP