TL;DR
This paper reviews approaches in string theory to resolve cosmological singularities, focusing on the Milne orbifold and matrix big bang models, highlighting recent developments and challenges.
Contribution
It provides an overview of methods to address cosmological singularities within string theory, emphasizing specific models like the Milne orbifold and matrix big bang.
Findings
String theory offers potential resolutions for cosmological singularities.
The Milne orbifold and matrix big bang are key models studied.
Challenges remain in fully resolving singularities in these models.
Abstract
These proceedings are based on lectures delivered at the "RTN Winter School on Strings, Supergravity and Gauge Theories", CERN, January 16 - January 20, 2006. The school was mainly aimed at Ph.D. students and young postdocs. The lectures start with a brief introduction to spacetime singularities and the string theory resolution of certain static singularities. Then they discuss attempts to resolve cosmological singularities in string theory, mainly focusing on two specific examples: the Milne orbifold and the matrix big bang.
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