D-branes and SQCD in Non-Critical Superstring Theory

TL;DR

This paper uses conformal field theory to analyze D-brane physics in a specific non-critical superstring background, revealing insights into D-brane dynamics relevant for supersymmetric QCD and holography.

Contribution

It provides a detailed analysis of D-brane configurations in a non-critical superstring theory, connecting to SQCD and holographic dualities with novel exact methods.

Findings

Identification of D-brane configurations realizing N=1 SQCD

Analysis of the massless spectrum and moduli space

Implications for non-critical AdS/CFT correspondence

Abstract

Using exact boundary conformal field theory methods we analyze the D-brane physics of a specific four-dimensional non-critical superstring theory which involves the N=2 SL(2)/U(1) Kazama-Suzuki model at level 1. Via the holographic duality of hep-th/9907178 our results are relevant for D-brane dynamics in the background of NS5-branes and D-brane dynamics near a conifold singularity. We pay special attention to a configuration of D3- and D5-branes that realizes N=1 supersymmetric QCD and discuss the massless spectrum and classical moduli of this setup in detail. We also comment briefly on the implications of this construction for the recently proposed generalization of the AdS/CFT correspondence by Klebanov and Maldacena within the setting of non-critical superstrings.