Notes on Axion, Inflation and Graceful Exit in Stringy Cosmology

TL;DR

This paper investigates the classical and quantum equations governing string cosmology with dilaton and axion fields, focusing on the graceful exit problem in specific scenarios.

Contribution

It provides an analysis of the classical and Wheeler-De Witt equations in string cosmology, addressing the graceful exit issue with axion and dilaton dynamics.

Findings

Insights into the classical equations of motion in string cosmology

Analysis of the Wheeler-De Witt equation for string effective actions

Discussion on conditions for a graceful exit in string cosmology

Abstract

We study the classical equations of motion and the corresponding Wheeler-De Witt equation for tree level string effective action with the dilaton and axion. The graceful exit problem in certain cases is then analysed.