Generalizations of the AdS/CFT correspondence

Details Generalizations of the AdS/CFT correspondence Generalizations of the AdS/CFT correspondence

2004-06-30

arxiv.org/abs/hep-th/0406274v1

Fortsch.Phys. 52 (2004) 727-826

Physics

High Energy Physics

High Energy Physics - Theory

Ph.D. Thesis, Humboldt University, Berlin, 130 pages, 38 figures, accepted for publication in Fortschritte der Physik

Scientific paper

10.1002/prop.200410169

We consider generalizations of the AdS/CFT correspondence in which probe branes are embedded in gravity backgrounds dual to either conformal or confining gauge theories. These correspond to defect conformal field theories (dCFT) or QCD-like theories with fundamental matter, respectively. Computing the quark condensate and the meson spectrum for a non-supersymmetric QCD-like theory from supergravity, we find spontaneous U(1) chiral symmetry breaking as well as the associated Goldstone boson. For another example at finite temperature, we observe a phase transition corresponding to a geometrical transition of the brane embedding. Moreover, starting from the dCFT we discuss the deconstruction of intersecting M5-branes. The resulting theory corresponds to two six-dimensional (2,0) superconformal field theories which we show to have tensionless strings on their four-dimensional intersection. Finally, we comment on the deconstruction of M-theory from a non-supersymmetric quiver gauge theory.

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