The hybrid curvaton

TL;DR

This paper explores hybrid curvaton models where inhomogeneous phase transitions generate curvature perturbations, highlighting potential natural conditions for non-Gaussianity within supergravity-motivated frameworks.

Contribution

It introduces a hybrid potential-based curvaton mechanism involving inhomogeneous phase transitions, expanding the understanding of curvature perturbation generation.

Findings

Inhomogeneous phase transitions modulate the onset of oscillation.

Supergravity-motivated models can naturally produce the required energy density.

Potential for significant non-Gaussianity in hybrid curvaton scenarios.

Abstract

We study both oscillating and inflating curvaton scenarios when the curvaton mechanism is caused by a hybrid potential. The source of the curvature perturbation is the inhomogeneous phase transition that causes the modulation of the onset of the oscillation. For the supergravity-motivated curvaton there is a possibility of finding natural coincidence of the energy density that is needed to affect non-Gaussianity in the curvaton scenario.