Cosmological perturbations from an inhomogeneous phase transition
arXiv:0902.4283 · doi:10.1088/0264-9381/26/14/145011
Abstract
A mechanism for generating metric perturbations in inflationary models is considered. Long-wavelength inhomogeneities of light scalar fields in a decoupled sector may give rise to superhorizon fluctuations of couplings and masses in the low-energy effective action. Cosmological phase transitions may then occur that are not simultaneous in space, but occur with time lags in different Hubble patches that arise from the long-wavelength inhomogeneities. Here an interesting model in which cosmological perturbations may be created at the electroweak phase transition is considered. The results show that phase transitions may be a generic source of non-Gaussianity.
18 pages, 3 figures, minor changes, accepted for publication in CQG
References in corpus (29)
- Reheating after Inflation
- Non-Gaussianity from Inflation: Theory and Observations
- Toward Realistic Intersecting D-Brane Models
- A new mechanism for generating density perturbations from inflation
- Detection of primordial non-Gaussianity (fNL) in the WMAP 3-year data at above 99.5% confidence
- Beauty is Attractive: Moduli Trapping at Enhanced Symmetry Points
- Generating the curvature perturbation at the end of inflation
- Cosmological Perturbations From Inhomogeneous Reheating, Freeze-Out, and Mass Domination
- Non-gaussianity from the second-order cosmological perturbation
- Modulated fluctuations from hybrid inflation
- Non-gaussianity and cosmic uncertainty in curvaton-type models
- Generating the Curvature Perturbation at the End of Inflation in String Theory
- Curvature Perturbations from Broken Symmetries
- Non-tachyonic brane inflation
- Non-Gaussianity from Symmetry
- F-term, D-term and hybrid brane inflation
- Modulated Inflation
- Weak Scale Inflation and Unstable Domain Walls
- On the cosmological domain wall problem in supersymmetric models
- Cosmological perturbations from inhomogeneous preheating and multi-field trapping
- Activated Sphalerons and Large Extra Dimensions
- Elliptic Inflation: Generating the curvature perturbation without slow-roll
- Brane inflation without slow-roll
- Generating curvature perturbations with or without MSSM flat directions
- Evolution of the curvature perturbations during warm inflation
- Hybrid Curvatons from Broken Symmetry
- Non-standard kinetic term as a natural source of non-Gaussianity
- Modulated inflation from kinetic term
- Curvatons and inhomogeneous scenarios with deviation from slow-roll
Cited by in corpus (19)
- Primordial Black Holes from the inflating curvaton
- On Classification of Models of Large Local-Type Non-Gaussianity
- The hybrid inflation waterfall and the primordial curvature perturbation
- Preheating and the non-gaussianity of the curvature perturbation
- Density Fluctuations in Thermal Inflation and Non-Gaussianity
- Primordial Trispectrum from Isocurvature Fluctuations
- The hybrid curvaton
- Scale-dependent CMB asymmetry from primordial configuration
- Non-Gaussianity in the inflating curvaton
- Spotted Inflation
- Delta-N formalism for the evolution of the curvature perturbations in generalized multi-field inflation
- Modulated decay in the multi-component Universe
- Affleck-Dine baryogenesis with modulated reheating
- A new perspective on supersymmetric inflation
- Delta-N Formalism for Curvaton with Modulated Decay
- Entropy production and curvature perturbation from dissipative curvatons
- Aspects of warm-flat directions
- Curvature perturbation from velocity modulation
- Thermal Inflation with a Thermal Waterfall Scalar Field Coupled to a Light Spectator Scalar Field