Cosmological Quantum String Vacua and String-String Duality

TL;DR

This paper explores how string-string dualities in quantum string theories can resolve cosmological singularities, leading to a unified, continuous picture of the universe's evolution and suggesting a natural inflationary cosmology.

Contribution

It demonstrates that quantum string theories and dualities can connect disjoint classical vacua, resolving singularities and providing a new framework for cosmological models.

Findings

Quantum string theories resolve classical singularities.

Disjoint vacua are continuously connected via dualities.

A natural inflationary cosmology emerges from this framework.

Abstract

Implications of string-string dualities to cosmological string vacua are discussed. Cosmological vacua of classical string theories comprise of disjoint classses mapped one another by scale-factor T-duality. Each classes are, however, afflicted with initial/final cosmological singularities. It is argued that quantum string theories and string-string dualities dramatically resolve these cosmological singularities out so that disjoint classical cosmological vacua are continuously connected in a unified manner. A natural inflationary cosmology follows from this.