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Local Scale-Dependent Non-Gaussian Curvature Perturbations at Cubic Order
E ective Field Theory Cosmology In ation Non-Gaussianity
2011/10/17
We calculate non-Gaussianities in the bispectrum and trispectrum arising from the cubic term in the local expansion of the scalar curvature perturbation. We compute to three-loop order and for general...
Full nonlinear growing and decaying modes of superhorizon curvature perturbations
Full nonlinear growing decaying modes superhorizon curvature perturbations
2010/12/21
We clarify the behavior of curvature perturbations in a nonlinear theory in case the inflaton tem-porarily stops during inflation. We focus on the evolution of curvature perturbation on superhorizon s...
Curvature Perturbations and non-Gaussianities from Waterfall Phase Transition during Inflation
Curvature Perturbations non-Gaussianities
2011/1/13
We consider a variant of hybrid inflation where the waterfall phase transition happens during inflation. By adjusting the parameters associated with the mass of the waterfall field, we arrange that t...
Full nonlinear growing and decaying modes of superhorizon curvature perturbations
Full nonlinear growing decaying modes
2010/12/27
We clarify the behavior of curvature perturbations in a nonlinear theory in case the inflaton temporarily stops during inflation. We focus on the evolution of curvature perturbation on superhorizon sc...