Scale Invariant Density Perturbations from Cyclic Cosmology

TL;DR

This paper demonstrates that quantum fluctuations during the contraction phase of a cyclic cosmology can produce scale-invariant density perturbations, aligning with observed large-scale structure.

Contribution

It introduces a mechanism for generating scale-invariant density fluctuations from quantum radiation fluctuations in cyclic cosmology.

Findings

Quantum fluctuations during contraction produce scale-invariant perturbations.

Perturbations re-enter the horizon during expansion, matching observational data.

Supports cyclic cosmology as a viable model for structure formation.

Abstract

It is shown how quantum fluctuations of the radiation during the contraction era of a CBE (Comes Back Empty) cyclic cosmology can provide density fluctuations which re-enter the horizon during the subsequent expansion era and at lowest order are scale invariant, in a Harrison-Zel'dovich-Peebles sense, as necessary to be consistent with observations of large scale structure.