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• W2080961659 abstract "Features in the inflaton potential that are traversed in much less than an $e$-fold of the expansion can produce observably large non-Gaussianity. In these models first-order corrections to the curvature mode function evolution induce effects at second order in the slow-roll parameters that are generically greater than $ensuremath{sim}10%$ and can reach order unity for order unity power spectrum features. From a complete first-order expression in generalized slow roll, we devise a computationally efficient method that is as simple to evaluate as the leading-order one and implements consistency relations in a controlled fashion. This expression matches direct numerical computation for step potential models of the dominant bispectrum configurations to better than 1% when features are small and 10% when features are order unity." @default.
• W2080961659 created "2016-06-24" @default.
• W2080961659 creator A5032638535 @default.
• W2080961659 creator A5044131605 @default.
• W2080961659 date "2012-05-29" @default.
• W2080961659 modified "2023-09-27" @default.
• W2080961659 title "Fast computation of first-order feature-bispectrum corrections" @default.
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• W2080961659 doi "https://doi.org/10.1103/physrevd.85.103531" @default.
• W2080961659 hasPublicationYear "2012" @default.
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