Maximally symmetric D-branes in gauged WZW models

TL;DR

This paper introduces gluing conditions to define D-branes in gauged WZW models, deriving boundary conditions and constructing a consistent open string action that aligns with previous formulations.

Contribution

It provides a new set of gluing conditions for D-branes in gauged WZW models and derives the associated boundary conditions and action.

Findings

Gluing conditions effectively characterize D-branes in gauged WZW models.

Derived boundary conditions for group-valued and subgroup-valued fields.

Constructed a gauged WZW action for open strings consistent with prior models.

Abstract

Gluing conditions are proposed to characterize the D-branes in gauged WZW models. From them the boundary conditions for the group-valued and the subgroup-valued fields are determined. We construct a gauged WZW action for open strings that coincides classically with those written previously, when the gluing conditions are imposed.