4.6 Article

Cosmological shapes of higher-spin gravity

出版社

IOP PUBLISHING LTD
DOI: 10.1088/1475-7516/2019/04/045

关键词

cosmology of theories beyond the SM; quantum gravity phenomenology

资金

  1. Royal Society
  2. Swiss National Science Foundation (SNSF) [200020-178787]
  3. STFC [ST/P000258/1] Funding Source: UKRI

向作者/读者索取更多资源

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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