Open and Closed String Interpretation of SUSY CFT's on Branes with Boundaries

TL;DR

This paper explores the duality between open and closed string descriptions of supersymmetric brane configurations with boundaries, revealing how conformal field theories on branes relate to gravity in AdS spaces with defects.

Contribution

It provides a detailed analysis of open/closed string duality in brane setups with boundaries, including probe calculations and the structure of dual AdS geometries with defects.

Findings

Dual closed string description involves AdS spaces with defects.

Analysis of intersecting branes with boundaries and their CFT duals.

Insights into back-reaction effects in these configurations.

Abstract

We consider certain supersymmetric configurations of intersecting branes and branes ending on branes and analyze the duality between their open and closed string interpretation. The examples we study are chosen such that we have the lower dimensional brane realizing an n+1 dimensional conformal field theory on its worldvolume and the higher dimensional one introducing a conformal boundary. We also consider two CFTs, possibly with different central charges, interacting along a common conformal boundary. We show with a probe calculation that the dual closed string description is in terms of gravity in an AdS_{n+2} bulk with an AdS_{n+1} defect or two different AdS_{n+2} spaces joined along a defect. We also comment briefly on the expected back-reaction.