Quantum Gravity Scenario of Inflation based on the CMB Anisotropies

TL;DR

This paper proposes an inflationary model rooted in conformal quantum gravity, explaining CMB anisotropies and the low multipole power spectrum fall-off through a quantum-to-classical transition of spacetime.

Contribution

It introduces a renormalizable conformal gravity model for inflation and links the CMB features to a quantum gravity scale transition.

Findings

Explains low multipole power spectrum fall-off in CMB

Derives primordial spectrum from conformal gravity model

Proposes a quantum-to-classical transition at a specific scale

Abstract

Inflationary scenario based on a renormalizable model of conformal gravity is proposed and primordial spectrum is derived. The sharp fall off of the angular power spectra at low multipoles in the COBE and WMAP observations are explained by a dynamical scale of quantum gravity. At this scale, the universe would make a sharp transition from the quantum spacetime with conformal invariance to the classical spacetime.