Density Perturbation Growth in Teleparallel Cosmology
Cosmology and Nongalactic Astrophysics
2015-06-12 v2 General Relativity and Quantum Cosmology
Abstract
We study the cosmological perturbations in teleparallel dark energy models in which there is a dynamical scalar field with a non-minimal coupling to gravity. We find that the propagating degrees of freedom are the same as in quintessence cosmology despite that variables of the perturbed vierbein field are greater than those in metric theories. We numerically show some evident discrepancy from general relativity in the evolutions of the perturbations on all scales of the universe. We also demonstrate that the gravitational interactions are enhanced during the unique tracker evolutions in these models.
Cite
@article{arxiv.1212.6214,
title = {Density Perturbation Growth in Teleparallel Cosmology},
author = {Chao-Qiang Geng and Yi-Peng Wu},
journal= {arXiv preprint arXiv:1212.6214},
year = {2015}
}
Comments
16 pages, 3 figures, revised version accepted for publication in JCAP