Scale-invariant tensor spectrum from conformal gravity

TL;DR

This paper demonstrates that conformal gravity with a specific mass parameter produces a scale-invariant tensor power spectrum during de Sitter inflation, offering insights into early universe cosmology.

Contribution

It shows that conformal gravity yields a scale-invariant tensor spectrum during inflation, a novel result linking conformal symmetry to cosmological perturbations.

Findings

Tensor power spectrum is scale-invariant.

Conformal gravity with $m^2=2H^2$ produces this spectrum.

Supports conformal gravity as a viable inflationary model.

Abstract

We study cosmological tensor perturbations generated during de Sitter inflation in the conformal gravity with mass parameter $m^2=2H^2$. It turns out that tensor power spectrum is scale-invariant.