Remarks on T-duality for open strings

TL;DR

This paper reviews recent developments in T-duality for open strings with gauge fields, discussing the connection between RG beta-functions and the Born-Infeld action in D-brane contexts.

Contribution

It provides a concise review of T-duality for open strings and critically examines the relation between RG beta-functions and the Born-Infeld action.

Findings

Clarifies T-duality in the presence of gauge fields

Analyzes the link between RG flows and D-brane effective actions

Highlights open questions in open string T-duality

Abstract

This contribution gives in sigma-model language a short review of recent work on T-duality for open strings in the presence of abelian or non-abelian gauge fields. Furthermore, it adds a critical discussion of the relation between RG beta-functions and the Born-Infeld action in the case of a string coupled to a D-brane.