Dynamical Topology Change in String Theory

TL;DR

This paper presents exact string solutions demonstrating dynamical topology change driven by a time-varying modulus field, exploring implications for effective theory validity and the use of stringy data in topology transitions.

Contribution

It introduces explicit string backgrounds with changing topology and discusses how effective theories can be connected across such transitions using string insights.

Findings

Topology change occurs dynamically via a time-dependent modulus.

Effective theories can be glued together using stringy information.

Insights into the validity region of effective descriptions during topology change.

Abstract

Exact string solutions are presented, providing backgrounds where a dynamical change of topology is occuring. This is induced by the time variation of a modulus field. Some lessons are drawn concerning the region of validity of effective theories and how they can be glued together, using stringy information in the region where the topology changes.