Multi-field inflation and the field-space metric
arXiv:1509.06781 · doi:10.1088/1475-7516/2016/09/039
Abstract
Multi-field inflation models include a variety of scenarios for how inflation proceeds and ends. Models with the same potential but different kinetic terms are common in the literature. We compare spiral inflation and Dante's inferno-type models, which differ only in their field-space metric. We justify a single-field effective description in these models and relate the single-field description to a mass-matrix formalism. We note the effects of the nontrivial field-space metric on inflationary observables, and consequently on the viability of these models. We also note a duality between spiral inflation and Dante's inferno models with different potentials.
21 pages, 6 pdf figures
References in corpus (15)
- Monodromy in the CMB: Gravity Waves and String Inflation
- Toward an Understanding of Foreground Emission in the BICEP2 Region
- Curvature and isocurvature perturbations in two-field inflation
- A joint analysis of Planck and BICEP2 B modes including dust polarization uncertainty
- Fitting the Gamma-Ray Spectrum from Dark Matter with DMFIT: GLAST and the Galactic Center Region
- The Primordial Inflation Polarization Explorer (PIPER)
- The Primordial Inflation Polarization Explorer (PIPER)
- Testing Hybrid Natural Inflation with BICEP2
- Spiral Inflation
- Dante's Waterfall
- Spiral Inflation with Coleman-Weinberg Potential
- A Minimal Sub-Planckian Axion Inflation Model with Large Tensor-to-Scalar Ratio
- Single-Superfield Helical-Phase Inflation
- A Permutation on Hybrid Natural Inflation
- New- vs. chaotic-inflations