Renormalization of Boundary Fermions and World-Volume Potentials on D-branes

TL;DR

This paper develops a sigma model approach to analyze boundary fermions on D-branes, performing two-loop computations of world-volume potentials and exploring NS flux couplings related to the dielectric effect.

Contribution

It introduces a sigma model formulation with boundary fermions for studying D-brane potentials and performs explicit two-loop calculations of the T-dual non-abelian Born-Infeld action.

Findings

Computed the T-dual potential at two loops.

Analyzed world-volume couplings of NS fluxes.

Connected flux couplings to Myers' dielectric effect.

Abstract

We consider a sigma model formulation of open string theory with boundary fermions carrying Chan-Paton charges at the string ends. This formalism is particularly suitable for studying world-volume potentials on D-branes. We perform explicit two-loop sigma model computations of the potential T-dual to the non-abelian Born-Infeld action. We also discuss the world-volume couplings of NS fluxes which are responsible for Myers' dielectric effect.