Resolving Gravitational Singularities

TL;DR

This paper reviews recent advances in resolving gravitational singularities within string theory, focusing on how higher derivative corrections and the AdS/CFT correspondence contribute to understanding and regularizing singular geometries.

Contribution

It highlights the role of higher derivative corrections in resolving singularities and discusses the challenges of applying AdS/CFT to such geometries.

Findings

Higher derivative corrections regularize the fundamental string in five dimensions.

Anomalies and supersymmetry determine the necessary corrections.

Applying AdS/CFT to these geometries presents unique challenges.

Abstract

We review recent progress on the resolution of gravitational singularities in string theory. The main example is the fundamental string in five dimensions which is singular in the standard supergravity description but regular after taking into account higher derivative corrections determined by anomalies and supersymmetry. The application of the AdS/CFT correspondence to geometries that require higher derivatives for regularity poses interesting challenges.