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arXiv · 1112.1967

Holographic predictions for cosmological 3-point functions

Adam Bzowski·Paul McFadden·Kostas Skenderis
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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.

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Adam Bzowski, Paul McFadden, Kostas Skenderis. 2011-12-08. Holographic predictions for cosmological 3-point functions. https://doi.org/10.1007/jhep03(2012)091

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