D-branes in Unoriented Non-critical Strings and Duality in SO(N) and Sp(N) Gauge Theories

Abstract

We exhibit exact conformal field theory descriptions of SO(N) and Sp(N) pairs of Seiberg-dual gauge theories within string theory. The N=1 gauge theories with flavour are realized as low energy limits of the worldvolume theories on D-branes in unoriented non-critical superstring backgrounds. These unoriented backgrounds are obtained by constructing exact crosscap states in the SL(2,R)/U(1) coset conformal field theory using the modular bootstrap method. Seiberg duality is understood by studying the behaviour of the boundary and crosscap states under monodromy in the closed string parameter space.

arXiv comment23 pages, 2 figures

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• On supersymmetry breaking in string theory from gauge theory in a throat
• Spectral function and quark diffusion constant in non-critical holographic QCD
• A Note on Seiberg Duality and Chiral Symmetry Breaking