A Model Of Inflationary Cosmology Without Singularity

TL;DR

This paper proposes a bounce-based inflationary cosmology model that predicts oscillatory features in the primordial power spectrum, potentially detectable in future CMB and LSS observations, offering an alternative to traditional inflation models.

Contribution

It introduces a non-singular bounce model of inflationary cosmology that produces distinctive oscillations in the primordial power spectrum, differing from standard slow-roll inflation.

Findings

Oscillatory features in the primordial power spectrum.

Altered CMB temperature power spectrum.

Detectable signals in future observations like PLANCK and LAMOST.

Abstract

In this letter, we propose a model of inflationary cosmology with a bounce preceded and study its primordial curvature perturbations. Our model gives rise to a primordial power spectrum with a feature of oscillation on large scales compared with the nearly scale-invariant spectrum generated by the traditional slow rolling inflation model. We will show this effect changes the Cosmic Microwave Background (CMB) temperature power spectrum and the Large Scale Structure (LSS) matter power spectrum. And further with a detailed simulation we will point out this signal is detectable to the forthcoming observations, such as PLANCK and LAMOST.