Analytical Study of Mode Coupling in Hybrid Inflation
arXiv:1004.1425 · doi:10.1103/PhysRevD.82.123524
Abstract
We provide an analytical study of the coupling of short and long wavelength fluctuation modes during the initial phase of reheating in two field models like hybrid inflation. In these models, there is - at linear order in perturbation theory - an instability in the entropy modes of cosmological perturbations which, if not cut off, could lead to curvature fluctuations which exceed the current observational values. Here, we demonstrate that the back-reaction of short wavelength fluctuations is too weak to lead to a truncation of the instability for the long wavelength modes on time scales comparable to the typical instability time scale of the long wavelength entropy modes. Hence, unless there are other mechanisms which truncate the instability, then in models such as hybrid inflation the curvature perturbations produced during reheating on scales of current observational interest may be very important.
17 pages, 6 figures, analysis now done for random phases, a couple of references added
References in corpus (46)
- Towards the Theory of Reheating After Inflation
- Reheating after Inflation
- Cosmic strings
- Hybrid Inflation
- Towards Inflation in String Theory
- Brane Inflation
- Universe Reheating after Inflation
- Dynamics of Symmetry Breaking and Tachyonic Preheating
- How generic is cosmic string formation in SUSY GUTs
- String Cosmology: A Review
- Tachyonic Instability and Dynamics of Spontaneous Symmetry Breaking
- On the Back Reaction Problem for Gravitational Perturbations
- The Energy-Momentum Tensor for Cosmological Perturbations
- D3/D7 Inflationary Model and M-theory
- Topological Defects and Structure Formation
- Parametric Amplification of Gravitational Fluctuations During Reheating
- Parametric Amplification of Metric Fluctuations During Reheating in Two Field Models
- General Relativistic effects in preheating
- Inflaton Decay and Heavy Particle Production with Negative Coupling
- Non-Gaussianity from Preheating
- Preheating in Hybrid Inflation
- Nongaussian and nonscale-invariant perturbations from tachyonic preheating in hybrid inflation
- Massless Metric Preheating
- Back Reaction Of Perturbations In Two Scalar Field Inflationary Models
- Non-Gaussianity from Instant and Tachyonic Preheating
- Nongaussianity from Tachyonic Preheating in Hybrid Inflation
- Lectures on Cosmic Inflation and its Potential Stringy Realizations
- Cosmological perturbation with two scalar fields in reheating after inflation
- Very Large Primordial Non-Gaussianity from multi-field: Application to Massless Preheating
- Non-Gaussian perturbations in hybrid inflation
- Evolution of cosmological perturbations in a stage dominated by an oscillatory scalar field
- Evolution of Cosmological Perturbation in Reheating Phase of the Universe
- Super-Hubble Nonlinear Perturbations During Inflation
- A Supersymmetric SO(10) Model with Inflation and Cosmic Strings
- Detecting Cosmic Strings in the CMB with the Canny Algorithm
- Canny Algorithm, Cosmic Strings and the Cosmic Microwave Background
- Back Reaction of Cosmological Perturbations and the Cosmological Constant Problem
- The Effects of Gravitational Back-Reaction on Cosmological Perturbations
- Inflation and String Cosmology
- Edge Detection, Cosmic Strings and the South Pole Telescope
- Dynamics of coupled bosonic systems with applications to preheating
- A Study of Structure Formation and Reheating in the D3/D7 Brane Inflation Model
- Searching for Signatures of Cosmic Superstrings in the CMB
- Non-Gaussianity in KKLMMT model
- Entropy Fluctuations in Brane Inflation Models
- Preheating the universe in hybrid inflation
Cited by in corpus (13)
- Nonperturbative Dynamics Of Reheating After Inflation: A Review
- Geometrical Destabilization of Inflation
- Stochastic Effects in Hybrid Inflation
- Backreaction and Stochastic Effects in Single Field Inflation
- Issues on Generating Primordial Anisotropies at the End of Inflation
- Primordial Anisotropies in Gauged Hybrid Inflation
- Large-scale Perturbations from the Waterfall Field in Hybrid Inflation
- Curvature Perturbations and non-Gaussianities from Waterfall Phase Transition during Inflation
- Lagrangian Formulation of Stochastic Inflation: A Recursive Approach
- No Large Scale Curvature Perturbations during Waterfall of Hybrid Inflation
- Recursive Stochastic Effects in Valley Hybrid Inflation
- Curvature perturbation and waterfall dynamics in hybrid inflation
- Local Features with Large Spiky non-Gaussianities during Inflation