Holographic predictions for cosmological 3-point functions
Abstract
We present the holographic predictions for cosmological 3-point correlators, involving both scalar and tensor modes, for a universe which started in a non-geometric holographic phase. Holographic formulae relate the cosmological 3-point functions to stress tensor correlation functions of a holographically dual three-dimensional non-gravitational QFT. We compute these correlators at 1-loop order for a theory containing massless scalars, fermions and gauge fields, and present an extensive analysis of the constraints due to Ward identities showing that they uniquely determine the correlators up to a few constants. We define shapes for all cosmological bispectra and compare the holographic shapes to the slow-roll ones, finding that some are distinguishable while others, perhaps surprisingly, are not.
Cite
@article{arxiv.1112.1967,
title = {Holographic predictions for cosmological 3-point functions},
author = {Adam Bzowski and Paul McFadden and Kostas Skenderis},
journal= {arXiv preprint arXiv:1112.1967},
year = {2012}
}
Comments
51pp; 4 figs