Cosmological Shapes of Higher-Spin Gravity
Abstract
We explore non-Gaussian features of a massless spin-two field in the Vasiliev theory of higher-spin gravity. The theory contains an infinite tower of interacting gauge fields with increasing spin, and admits four-dimensional asymptotically de Sitter configurations. Using a recent proposal for calculating late-time quantum correlations in Vasiliev theory, we provide an exact formula for the tensor non-Gaussianities of the massless spin-two graviton field. By general symmetry considerations, we relate our result to that produced by a tree-level calculation in a gravitational theory containing an Einstein term and a term cubic in the Weyl tensor. The relative coefficient between the two terms is calculated explicitly, exhibiting a significant contribution from the Weyl cubed term. We discuss potential cosmological implications of our results.
Keywords
Cite
@article{arxiv.1902.01251,
title = {Cosmological Shapes of Higher-Spin Gravity},
author = {D. Anninos and V. De Luca and G. Franciolini and A. Kehagias and A. Riotto},
journal= {arXiv preprint arXiv:1902.01251},
year = {2019}
}
Comments
34 pages, 3 figures