Holographic predictions for cosmological 3-point functions

Details Holographic predictions for cosmological 3-point functions Holographic predictions for cosmological 3-point functions

2011-12-08

arxiv.org/abs/1112.1967v1

JHEP 03(2012)091

Physics

High Energy Physics

High Energy Physics - Theory

51pp; 4 figs

Scientific paper

10.1007/JHEP03(2012)091

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.

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