Pre-Big Bang Cosmology and Quantum Fluctuations

TL;DR

This paper investigates quantum fluctuations in a pre-big bang cosmological model, showing that particle production is negligible during the perturbative phase through exact solutions for perturbations.

Contribution

It provides an exact analysis of tensor and scalar perturbations in an open pre-big bang model, highlighting the minimal particle production during the perturbative phase.

Findings

Particle production is negligible during the perturbative phase.

Exact solutions for tensor and scalar perturbations are obtained.

Supports the viability of the pre-big bang scenario with minimal quantum particle creation.

Abstract

The quantum fluctuations of a homogeneous, isotropic, open pre-big bang model are discussed. By solving exactly the equations for tensor and scalar perturbations we find that particle production is negligible during the perturbative Pre-Big Bang phase.