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Non-linear isocurvature perturbations and non-Gaussianities

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, no. 12 (2008): 004

Cited: 75|Views22

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cosmological perturbation theoryinflationphysics of the early universe

Abstract

We study non-linear primordial adiabatic and isocurvature perturbations and their non-Gaussianity. After giving a general formulation in the context of an extended delta N formalism, we analyse in detail two illustrative examples. The first is a mixed curvaton-inflaton scenario in which fluctuations of both the inflaton and a curvaton (a ...More

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David Langlois

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Filippo Vernizzi

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David Wands

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