Signatures of the Early Universe: Uncovering Cosmological Footprints

TL;DR

This paper reviews the cosmological signatures from the early Universe's post-inflationary epochs, including matter production, primordial black holes, and gravitational waves, highlighting theoretical models and observational prospects.

Contribution

It provides a comprehensive review of the theoretical frameworks and observational constraints related to early Universe signatures, emphasizing future detection prospects.

Findings

Discussion of mechanisms like inflaton oscillation and parametric resonance

Summary of current observational constraints on early Universe signatures

Analysis of future prospects for detecting primordial black holes and gravitational waves

Abstract

The post-inflationary epochs are critical for comprehending the early evolution of our Universe. This article delves into the cosmological signatures that shed light on these early epochs, particularly focusing on the generation of various phenomena such as matter production via inflaton oscillation and parametric resonance, primordial black holes, and gravitational waves. We review the theoretical frameworks that could produce these signatures and discuss the current observational constraints along with prospects for future detection. Furthermore, we explore the implications of such observations for our understanding of the physics of the early Universe.