Matrix Big Brunch

TL;DR

This paper introduces an extended string background model that captures a universe with both Big Bang and Big Crunch singularities, utilizing Matrix String Theory to resolve singularities and describe the universe's evolution.

Contribution

It extends previous holographic models to include both Big Bang and Big Crunch singularities within an exact string background framework.

Findings

Proposes a new background describing a universe with both singularities.

Demonstrates the use of Matrix String Theory to resolve singularities.

Provides a simple theory for the complete evolution of a closed universe.

Abstract

Following the holographic description of linear dilaton null Cosmologies with a Big Bang in terms of Matrix String Theory put forward by Craps, Sethi and Verlinde, we propose an extended background describing a Universe including both Big Bang and Big Crunch singularities. This belongs to a class of exact string backgrounds and is perturbative in the string coupling far away from the singularities, both of which can be resolved using Matrix String Theory. We provide a simple theory capable of describing the complete evolution of this closed Universe.