Inter-brane Interactions in Compact Spaces and Brane Inflation

TL;DR

This paper explores the viability of brane inflation models in compact spaces, showing that certain configurations like small-angle branes can still produce inflation, and discusses methods for analyzing potentials in these settings.

Contribution

It demonstrates the viability of brane inflation with small-angle branes and proposes a new approach to treat potentials in compact spaces for realistic models.

Findings

Brane-anti-brane inflation without warped geometry can be viable with small-angle configurations.

Inflationary scenarios may still work under specific conditions.

A new method to analyze potentials in compact spaces is introduced.

Abstract

It was pointed out that brane-anti-brane inflation without warped geometry is not viable due to compactification effects (in the simplified scenario where the inflaton is decoupled from the compactification moduli). We show that the inflationary scenario with branes at a small angle in this simplified scenario remains viable. We also point out that brane-anti-brane inflation may still be viable under some special conditions. We also discuss a way to treat potentials in compact spaces that should be useful in the analysis of more realistic brane inflationary scenarios.