Matrix String Description of Cosmic Singularities in a Class of Time-dependent Solutions

TL;DR

This paper explores whether matrix string theory can effectively describe cosmic singularities in a class of time-dependent solutions with supersymmetry, providing examples where a perturbative approach is feasible.

Contribution

It demonstrates the potential for matrix string theory to model cosmic singularities in specific time-dependent backgrounds, expanding the understanding of string descriptions of singularities.

Findings

Matrix string description is possible for certain solutions.

Perturbative descriptions are feasible in selected cases.

The study extends matrix string applications to cosmological singularities.

Abstract

A large class of time-dependent solutions with 1/2 supersymmetry were found previously. These solutions involve cosmic singularities at early time. In this paper, we study if matrix string description of the singularities in these solutions with backgrounds is possible and present several examples where the solutions can be described well in the perturbative picture.