Non-Minimal Inflation on the Warped DGP Brane

TL;DR

This paper develops a non-minimal inflation model on a warped DGP brane, demonstrating spontaneous exit from inflation and analyzing observational constraints on model parameters.

Contribution

It introduces a non-minimally coupled inflaton on a warped DGP brane with an exponential potential, showing spontaneous exit from inflation without additional mechanisms.

Findings

Spontaneous exit from inflation is possible with suitable non-minimal coupling.

The model's predictions align with recent observational data.

Parameter space constraints are derived for the non-minimal coupling.

Abstract

We construct an inflation model with inflaton non-minimally coupled to gravity on a warped DGP brane. Using an exponential potential, we calculate scalar power spectrum, spectral index and the running of the spectral index. We show that for a suitable range of non-minimal coupling it is possible to exit the inflationary phase spontaneously and without any mechanism, even in the case that minimal inflation can not exit spontaneously. By a detailed analysis of parameter space, we study the constraints imposed on the non-minimal coupling from recent observational data.