Cosmological shapes of higher-spin gravity

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 calcul...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2019-04, Vol.2019 (4), p.45-45
Main Authors: Anninos, D., Luca, V. De, Franciolini, G., Kehagias, A., Riotto, A.
Format: Article
Language:English
Subjects:
Gravitation theory
Gravitons
Mathematical analysis
Tensors
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Summary: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.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2019/04/045