Density Perturbations in the Brans-Dicke Theory
J.P. Baptista, J.C. Fabris, S.V.B. Goncalves (Universidade Federal, do Espirito Santo - Brazil)
TL;DR
This paper investigates how density perturbations evolve in Brans-Dicke theory, revealing that negative Brans-Dicke parameters can lead to significant amplification of these perturbations across various cosmological scenarios.
Contribution
It provides a comprehensive classification of solutions for density perturbations in Brans-Dicke theory during different cosmic epochs, highlighting the impact of the Brans-Dicke parameter.
Findings
Negative Brans-Dicke parameter amplifies perturbations
Perturbation behavior varies with background evolution
Detailed solutions for vacuum, inflation, radiation, matter
Abstract
We analyse the fate of density perturbation in the Brans-Dicke Theory, giving a general classification of the solutions of the perturbed equations when the scale factor of the background evolves as a power law. We study with details the cases of vacuum, inflation, radiation and incoherent matter. We find, for the a negative Brans-Dicke parameter, a significant amplification of perturbations.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.