Multi-Stream Inflation
arXiv:0903.2123 · doi:10.1088/1475-7516/2009/07/033
Abstract
We propose a "multi-stream" inflation model, which is a double field model with spontaneous breaking and restoration of an approximate symmetry. We calculate the density perturbation and non-Gaussianity in this model. We find that this model can have large, scale dependent, and probably oscillating non-Gaussianity. We also note that our model can produce features in the CMB power spectrum and hemispherical power asymmetry.
14 pages, 2 figures; v2: references added; v3: final version to appear on JCAP
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Cited by in corpus (29)
- Quasi-Single Field Inflation and Non-Gaussianities
- Inflation, Cosmic Perturbations and Non-Gaussianities
- A Note on Calm Excited States of Inflation
- Tilted Physics: A Cosmologically Dipole-Modulated Sky
- Trans-Planckian censorship of multistage inflation and dark energy
- Inflationary power asymmetry from primordial domain walls
- Curvature Perturbations and non-Gaussianities from Waterfall Phase Transition during Inflation
- Detectability of Gravitational Waves from the Coalescence of Massive Primordial Black Holes with Initial Clustering
- A Theory of a Spot
- Classical transitions with the topological number changing in the early Universe
- Hybrid Quasi-Single Field Inflation
- Inflation in a Web
- Sudden braking and turning with a two-field potential bump: primordial black hole formation
- Multi-Stream Inflation in a Landscape
- Detectability of Primordial Black Hole Binaries at High Redshift
- Position Space CMB Anomalies from Multi-Stream Inflation
- A Terminal Velocity on the Landscape: Particle Production near Extra Species Loci in Higher Dimensions
- Quadra-Spectrum and Quint-Spectrum from Inflation and Curvaton Models
- Ultrahigh-energy Gamma Rays and Gravitational Waves from Primordial Exotic Stellar Bubbles
- Non-Gaussianity from false vacuum inflation: Old curvaton scenario
- What Planck does not tell us about inflation
- Non-Uniqueness of Classical Inflationary Trajectories on a High-Dimensional Landscape
- On mass spectra of primordial black holes
- An Inflationary Probe of Cosmic Higgs Switching
- Lattice Simulation of Multi-Stream Inflation
- Cosmological Standard Timers from Unstable Primordial Relics
- CMB statistical anisotropies of classical and quantum origins
- Populating the landscape in an inhomogeneous universe
- Reconciling cosmic dipolar tensions with a gigaparsec void