2011/12/08 by Adam Bzowski, Paul McFadden, Kostas Skenderis · 1 citation
Physics and Astronomy · #hep-th #astro-ph.CO #gr-qc
paper · pdf · doi:10.1007/jhep03(2012)091
published as JHEP 03(2012)091 · 51pp; 4 figs
arxiv created 2011/12/08 · arxiv updated 2012/04/11
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.