Fluctuations through a Vibrating Bounce
High Energy Physics - Theory
2018-02-14 v1 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
We study the evolution of cosmological perturbations in a non-singular bouncing cosmology with a bounce phase which has superimposed oscillations of the scale factor. We identify length scales for which the final spectrum of fluctuations obtains imprints of the non-trivial bounce dynamics. These imprints in the spectrum are manifested in the form of damped oscillation features at scales smaller than a characteristic value and an increased reddening of the spectrum at all the scales as the number of small bounces increases.
Cite
@article{arxiv.1711.08370,
title = {Fluctuations through a Vibrating Bounce},
author = {Robert Brandenberger and Qiuyue Liang and Rudnei O. Ramos and Siyi Zhou},
journal= {arXiv preprint arXiv:1711.08370},
year = {2018}
}
Comments
17 pages, 5 figures