2021/03/31 by Giovanni Cabass
Mathematics · Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Cosmology and Gravitation Theories #De Sitter universe #Galaxies: Formation, Evolution, Phenomena #Geometry #Gravitation #Graviton #Inflation (cosmology) #Mathematics #Particle physics #Physics #Quantum mechanics #Spontaneous symmetry breaking #Symmetry (geometry) #Symmetry breaking #Theoretical physics #Universe #astro-ph.CO #hep-th
paper · pdf · doi:10.1088/1475-7516/2021/12/001
14 pages, 1 table, matches JCAP version
arxiv created 2021/11/17 · openalex publication_date 2021/12/01 · arxiv updated 2021/12/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
Abstract We characterize graviton non-Gaussianities in models of inflation where de Sitter boosts are spontaneously broken. We discuss which of the symmetry breaking patterns studied in Nicolis et al., 2015 [1] can sustain a period of quasi de Sitter expansion, and show that the symmetry breaking pattern of Solid Inflation allows the most freedom for graviton interactions. We comment on the phenomenological consequences of some of these interactions. As a byproduct of this analysis we construct the “EFT of Solid Inflation”, which has all the useful features of the EFT of Inflation but for the case of broken spatial diffeomorphisms.