Particle spectra of gravity based on internal symmetry of quantum fields

TL;DR

This paper explores the particle spectra of a gravity theory based on internal symmetry in quantum fields, focusing on the weak-field limit and suggesting extensions for further research.

Contribution

It analyzes the weak-field, zero-coupling limit of Yang--Mills gravity as a quantum field theory and proposes directions for extending the theory.

Findings

Identifies a ghostly teleparallel vacuum in the weak-field limit.

Suggests investigating bimetric and finite-coupling extensions.

Highlights the need for further exploration of the theory's extensions.

Abstract

We examine the weak-field, zero-coupling limit of Yang--Mills gravity as recently formulated by Partanen and Tulkki, viewed as a free quantum field theory. In this approximation the theory has a ghostly teleparallel vacuum. We suggest that bimetric, vacuum expectation value, or finite-coupling extensions should be investigated.