The holographic dilaton

Understand

We study a set of examples of holographic duals to theories with spontaneous breaking of conformal invariance in different dimensions.

• The geometries are domain walls interpolating between two AdS spaces, with a non-trivial background scalar field dual to a relevant operator.
• We comment on a subtlety in the low momentum expansion pointed out in arXiv:1304.3051 for the case of background gravity and revise the dynamical gravity results of arXiv:1207.0006, where the dilaton pole was missing in the scalar-scalar and tensor-tensor two-point functions.
• We compute the energy-momentum tensor and scalar two-point functions and show that there is indeed a massless dilaton pole.