Pre-Big-Bang in String Cosmology
Monica Borunda, M. Ruiz-Altaba
TL;DR
This paper evaluates the necessary inflation in pre-big-bang string cosmology to address the horizon problem, demonstrating that the model can solve this issue with appropriate inflation levels.
Contribution
It provides a quantitative analysis of inflation requirements in pre-big-bang string cosmology and discusses related fine-tuning issues.
Findings
Inflation in pre-big-bang models can solve the horizon problem.
The required amount of inflation is quantified.
Fine-tuning considerations are discussed.
Abstract
We compute the amount of inflation required to solve the horizon problem of cosmology in the pre-big-bang scenario. First we give a quick overview of string cosmology as developed by Veneziano and collaborators. Then we show that the amount of inflation in this background solves the horizon problem. We discuss fine-tuning.
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