  It has recently been suggested that a strongly coupled phase of inflation may
be described holographically in terms of a weakly coupled quantum field theory
(QFT). Here, we explore the possibility that the wave function of an
inflationary universe may be given by the partition function of a boundary QFT.
We consider the case when the field theory is a small deformation of a
conformal field theory (CFT), by the addition of a relevant operator O, and
calculate the primordial spectrum predicted in the corresponding holographic
inflation scenario. Using the Ward-Takahashi identity associated with Weyl
rescalings, we derive a simple relation between correlators of the curvature
perturbation and correlators of the deformation operator O at the boundary.
This is done without specifying the bulk theory of gravitation, so that the
result would also apply to cases where the bulk dynamics is strongly coupled.
We comment on the validity of the Suyama-Yamaguchi inequality, relating the
bi-spectrum and tri-spectrum of the curvature perturbation.
