Light-cone gravity in dS$_4$

TL;DR

This paper derives a closed-form light-cone Lagrangian for pure gravity in four-dimensional de Sitter space and provides a perturbative expansion up to cubic order, facilitating further theoretical investigations.

Contribution

It presents the first explicit closed-form light-cone Lagrangian for gravity in dS4 and a cubic order perturbative expansion, advancing the understanding of gravity in de Sitter backgrounds.

Findings

Closed-form light-cone Lagrangian for dS4 gravity

Perturbative expansion up to cubic order

Foundation for future quantum gravity studies in de Sitter space

Abstract

We derive a closed form expression for the light-cone Lagrangian describing pure gravity on a four-dimensional de Sitter background. We provide a perturbative expansion, of this Lagrangian, to cubic order in the fields.