Curvaton mechanism after multi-field inflation

Abstract

The evolution of the curvature perturbation after multi-field inflation is studied in the light of the curvaton mechanism. Past numerical studies show that many-field inflation causes significant evolution of the curvature perturbation after inflation, which generates significant non-Gaussianity at the same time. We reveal the underlying mechanism of the evolution and show that the evolution is possible in a typical two-field inflation model.

10 pages, 2 figures, accepted for publication in PRD

References in corpus (4)

• Non-gaussianity and cosmic uncertainty in curvaton-type models
• Preheating after N-flation
• Elliptic Inflation: Generating the curvature perturbation without slow-roll
• Evolution of the curvature perturbation during and after multi-field inflation

Cited by in corpus (3)

• General analytic predictions of two-field inflation and perturbative reheating
• Non-Gaussianity in the inflating curvaton
• Revised $f_{\mathrm{NL}}$ parameter in Curvaton Scenario