Journal
PHYSICAL REVIEW D
Volume 90, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.90.063506
Keywords
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Funding
- NASA [NNX10AH14G]
- Department of Energy [DE-FG02-11ER41743, DE-FG02-92ER40699]
- National Science Foundation
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The recently proposed model of solid inflation features a peculiar three-point function for scalar perturbations with an anisotropic, purely quadrupolar, squeezed limit. We confirm this result as well as the overall amplitude of the three-point function via an extremely simple computation, where we focus on the squeezed limit from the start and follow the standard logic adopted in deriving the consistency relations. Our system violates the consistency relations, but in the squeezed limit the three-point function can still be traded for a background-dependent two-point function, which is immediate to compute. Additionally, we use these simple methods to derive some new results-namely, certain squeezed limits of the three-point correlators involving vector and tensor perturbations as well.
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