Inflation in String Theory and how you can get out of it

TL;DR

This paper reviews inflation in string theory, focusing on exit mechanisms, and introduces a model based on type-0 string theory where the universe transitions smoothly from inflation to a flat universe.

Contribution

It proposes a novel type-0 string theory model that enables a smooth exit from inflation to a flat Robertson-Walker universe.

Findings

Successful transition from inflation to flat universe in the proposed model

Addresses the exit problem in string and brane inflation theories

Provides a concrete string theory-based scenario for post-inflation universe evolution

Abstract

Inflation is now a basic ingredient of the modern cosmology. After reviewing the basic characteristics of inflation, we briefly discuss inflation in string and brane theories, focusing on the problem of the exit from inflation in these theories. We present a model, based on type-0 string theory, in which our universe after the inflationary phase, passes smoothly to a flat Robertson-Walker universe.