On the absence of ghosts in quadratic bigravity
General Relativity and Quantum Cosmology
2025-01-23 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
An extension of the bimetric theory of gravity is considered that includes quadratic Ricci curvature terms associated with each metric. The issue of the Boulware-Deser ghost is analyzed. The Hamiltonian constraint is derived and the existence of a secondary constraint is shown, proving that the theory is ghost-free.
Keywords
Cite
@article{arxiv.2311.14799,
title = {On the absence of ghosts in quadratic bigravity},
author = {Ioannis D. Gialamas and Kyriakos Tamvakis},
journal= {arXiv preprint arXiv:2311.14799},
year = {2025}
}
Comments
13 pages, matches published version