Cosmic acceleration in Regge-Teitelboim gravity

TL;DR

This paper demonstrates that in Regge-Teitelboim gravity, certain embeddings of the Robertson-Walker metric naturally produce source terms that lead to cosmic acceleration, offering an alternative explanation to dark energy.

Contribution

It introduces a new perspective on cosmic acceleration through embedding-induced source terms in Regge-Teitelboim gravity, distinct from standard energy-momentum sources.

Findings

Embedding source terms can generate cosmic acceleration

Regge-Teitelboim gravity provides an alternative to dark energy

Simple embeddings of Robertson-Walker metric suffice

Abstract

The Regge-Teitelboim formulation of gravity, which utilizes dynamical embeddings in a background space, effectively introduces source terms in the standard Einstein equations that are not attributable to the energy-momentum tensor. We show that for a simple class of embeddings of the Robertson-Walker metric, these source terms naturally generate cosmic acceleration.