Extended Open Inflation

TL;DR

This paper introduces a novel one-field open inflation model using a nonminimally coupled scalar field with polynomial potentials, enabling Coleman-de Luccia instantons and subsequent slow-roll inflation after bubble nucleation.

Contribution

It proposes a new class of open inflation models with nonminimal coupling, expanding the theoretical framework for early universe cosmology.

Findings

Existence of Coleman-de Luccia instantons in the model

Successful realization of slow-roll inflation post-bubble nucleation

Potential for explaining open universe scenarios

Abstract

We present a new type of one-field models for open inflation utilizing a nonminimally coupled scalar field with polynomial potentials in which the Coleman-de Luccia instanton does exist and slow-roll inflation after the bubble nucleation is realized.