Lorentz violating inflation and the Swampland

TL;DR

This paper explores how Lorentz violating inflationary models can reconcile single-field inflation with string theory swampland conjectures, which are incompatible in standard GR-based cosmology.

Contribution

It demonstrates that Lorentz violating inflation can satisfy swampland criteria and makes some popular inflationary potentials compatible with these conjectures.

Findings

Lorentz violating inflation models can be swampland consistent

Certain inflationary potentials are compatible with swampland conjectures in this framework

Provides conditions for swampland consistency in Lorentz violating scenarios

Abstract

The swampland conjectures from String theory have had very interesting implications for cosmology and particularly for Inflation. It has been shown that the single field inflationary models in a GR based cosmology are in unavoidable tensions with these conjectures and so it becomes interesting to see whether there is a way to overcome the issues of the swampland and single field inflation in an essentially GR based cosmology. We show that this can be the case if one considers a certain type of Lorentz violating inflationary scenario. We work out the requirements for these inflationary models to be swampland consistent and then show how this scenario allows some popular inflationary potentials to be swampland consistent as well.