In this note I study preheating after multi-field inflation to assess the feasibility of parametric resonance. An intuitive argument for the suppression of resonances due to dephasing of fields in generic multi-field models is presented. This effect is absent in effective single field models, render
Exposition to Staggered Multi-Field Inflation
β Scribed by Thorsten Battefeld
- Book ID
- 103870607
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 145 KB
- Volume
- 192-193
- Category
- Article
- ISSN
- 0920-5632
No coin nor oath required. For personal study only.
β¦ Synopsis
I investigate multi-field inflationary models with fields that decay during inflation, leading to staggered inflation. This feature is natural in many models motivated by string theory, for instance if inflatons are related to interbrane distances and the branes start to annihilate during inflation. A short exposition to an analytic framework is provided, enabling the computation of leading order corrections to observables, i.e. the scalar spectral index.
π SIMILAR VOLUMES
Second order accurate (first order at extrema) cell averaged based approximations extending the Lax-Friedrichs central scheme, using component-wise rather than field-by-field limiting, have been found to give surprisingly good results for a wide class of problems involving shocks (see H. Nessyahu an