# Primordial power spectra from an emergent universe: basic results and clarifications

## TL;DR

This paper investigates the primordial tensor power spectrum in emergent universe models, clarifying misconceptions and exploring conditions for scale invariance and local features influenced by the universe's early evolution.

## Contribution

It provides a detailed analysis of the primordial tensor spectrum in emergent universe scenarios, correcting naive assumptions and examining the impact of the scale factor's evolution.

## Key findings

- Conditions for scale invariance in emergent models
- Presence of local features sensitive to early universe dynamics
- Clarification of misconceptions about primordial spectra

## Abstract

Emergent cosmological models, together with the Big Bang and bouncing scenarios, are among the possible descriptions of the early Universe. This work aims at clarifying some general features of the primordial tensor power spectrum in this specific framework. In particular, some naive beliefs are corrected. Using a toy model, we investigate the conditions required to produce a scale invariant spectrum and show to which extent this spectrum can exhibit local features sensitive to the details of the scale factor evolution near the transition time.