Primordial curvature perturbation during and at the end of multi-field inflation
arXiv:1202.0089 · doi:10.1016/j.nuclphysb.2012.04.004
Abstract
We study the generation of the primordial curvature perturbation in multi-field inflation. Considering both the evolution of the perturbation during inflation and the effects generated at the end of inflation, we present a general formula for the curvature perturbation. We provide the analytic expressions of the power spectrum, spectral tilt and non-Gaussianity for the separable potentials of two inflaton scalars, and apply them to some specific models.
20 pages
References in corpus (18)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Non-Gaussianities in two-field inflation
- Non-Gaussianity in the modulated reheating scenario
- Primordial Curvature Fluctuation and Its Non-Gaussianity in Models with Modulated Reheating
- Multi-brid inflation and non-Gaussianity
- Non-Gaussianity from Preheating
- Multiple field inflation
- A numerical study of non-gaussianity in the curvaton scenario
- Large non-Gaussianity from multi-brid inflation
- Hybrid inflation along waterfall trajectories
- Generating the Curvature Perturbation at the End of Inflation in String Theory
- Non-gaussianity for a Two Component Hybrid Model of Inflation
- Non-Gaussianities in Multifield Inflation: Superhorizon Evolution, Adiabaticity, and the Fate of fnl
- The Trispectrum in the Multi-brid Inflation
- Note on Non-Gaussianities in Two-field Inflation
- Evolution of the curvature perturbation during and after multi-field inflation
- Non-Gaussianity and gravitational wave background in curvaton with a double well potential
- Natural Hybrid Inflation Model with Large Non-Gaussianity
Cited by in corpus (15)
- Reheating, Multifield Inflation and the Fate of the Primordial Observables
- Separable and non-separable multi-field inflation and large non-Gaussianity
- Large trispectrum in two-field slow-roll inflation
- Local non-Gaussianity from rapidly varying sound speeds
- Hubble multi-scalar inflation
- Influence of Reheating on the Trispectrum and its Scale Dependence
- New conservation laws and exact cosmological solutions in Brans-Dicke cosmology with an extra scalar field
- Modulated reheating by curvaton
- Mixed non-Gaussianity in multiple-DBI inflation
- What Planck does not tell us about inflation
- Large tensor spectrum of BICEP2 in the natural SUSY hybrid model
- Primordial gravitational wave of BICEP2 from dynamical double hybrid inflation
- Covariant second-order perturbations in generalized two-field inflation
- Observable predictions of generalised inflationary scenarios
- Anisotropic Spacetimes in Chiral Scalar Field Cosmology