Holography and Phenomenology

Abstract

We examine various aspects of the conjectured duality between warped AdS5 geometries with boundary branes and strongly coupled (broken) conformal field theories coupled to dynamical gravity. We also examine compactifications with 5-d gauge fields, in which case the holographic dual is a broken CFT weakly coupled to dynamical gauge fields in addition to gravity. The holographic picture is used to clarify a number of important phenomenological issues in these and related models, including the questions of black hole production, radius stabilization, early universe The lesson from the AdS/CFT correspondence [1, 2, 3] is that a gravity theory on AdS5 is equivalent to a strongly coupled 4D CFT. However, when all the symmetries are fully realized, the physical equivalence between the theories is slightly obscure. Normally, we think of two theories as being equivalent if they make identical predictions for all physical