Exact solution to perturbative conformal cosmology from recombination until the current era

TL;DR

This paper provides an exact solution for cosmological perturbations in conformal gravity that spans from recombination to the present, extending previous work and offering a comprehensive model of cosmic evolution.

Contribution

It presents a novel exact solution for perturbative conformal cosmology applicable from recombination to today, improving understanding of conformal gravity's role in cosmic history.

Findings

Exact solution from recombination to current era

Supports conformal gravity as a viable cosmological model

Enhances previous perturbation theory results

Abstract

In a previous paper (P. D. Mannheim, Phys. Rev. D 102, 123535 (2020)) we studied cosmological perturbation theory in the cosmology associated with the fourth-order derivative conformal gravity theory, and provided an exact solution to the theory in the recombination era. In this paper we present an exact solution that holds all the way from recombination until the current era.