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Résumé |
We explore the possibilities of breaking conformal symmetry spontaneously by introducing flavour branes
into conformal holographic backgrounds in the probe limit. A prototype model of such a mechanism is
based on placing D7 - anti-D7 configuration in the Klebanov-Witten conifold based model. In this paper
we generalize this model. We conjecture on the required topology of the backgrounds and the
corresponding probe brane embeddings. We identify several models that obey these requirements and
admit spontaneous breaking of conformal invariance. These include type IIB conifold based examples, dual
to defect field theories based on the conifold, and type IIA constructions based on the ABJM model. We
identify the dilaton, the corresponding Goldstone boson, discuss its effective action and address the "a-
term". We briefly discuss the relevance of these models to the pseudo dilaton. |
