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Cosmological shapes of higher-spin gravity

Research output: Contribution to journalArticle

D. Anninos, V. De Luca, G. Franciolini, A. Kehagias, A. Riotto

Original languageEnglish
Article number045
JournalJournal of Cosmology and Astroparticle Physics
Volume2019
Issue number4
Early online date24 Apr 2019
DOIs
Publication statusPublished - Apr 2019

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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.

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