Multi-Stream Inflation in a Landscape
arXiv:1201.0029 · doi:10.1088/1475-7516/2012/04/012
Abstract
There are hidden observables for inflation, such as features localized in position space, which do not manifest themselves when only one inflation trajectory is considered. To address this issue, we investigate inflation dynamics in a landscape mimicked by a random potential. We calculate the probability for bifurcation of the inflation trajectory in multi-stream inflation. Depending on the shape of the random bumps and the distance between bumps in the potential, there is a phase transition: on one side of the critical curve in parameter space isocurvature fluctuation are exponentially amplified and bifurcation becomes very probable. On the other side bifurcation is dominated by a random walk where bifurcations are less likely to happen.
Reference added to match published version in JCAP
References in corpus (9)
- Reheating in Inflationary Cosmology: Theory and Applications
- String Cosmology: A Review
- Effects of particle production during inflation
- On Features and Nongaussianity from Inflationary Particle Production
- Challenges for String Cosmology
- Multi-field inflation with random potentials: field dimension, feature scale and non-Gaussianity
- Slow nucleation rates in Chain Inflation with QCD Axions or Monodromy
- Simplified Chain Inflation
- A Terminal Velocity on the Landscape: Particle Production near Extra Species Loci in Higher Dimensions
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- Artificial Neural Network in Cosmic Landscape
- Local random potentials of high differentiability to model the Landscape
- Position Space CMB Anomalies from Multi-Stream Inflation
- 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
- Lattice Simulation of Multi-Stream Inflation
- Cosmological Standard Timers from Unstable Primordial Relics