Properties of perturbations in conformal cosmology

摘要

This review is centered on the properties and mechanisms underlying the generation of perturbations in models of the early Universe with conformal invariance, which could be alternatives to inflation. A detailed analysis of the properties of primary scalar perturbations, i.e., power spectrum, statistical anisotropy, and non-Gaussianity is performed within the framework of these models. Properties of primary gravitational waves are also considered.