Dynamical diffeomorphisms
General Relativity and Quantum Cosmology
2021-05-12 v1
Abstract
We construct a general effective dynamics for diffeomorphisms of spacetime, in a fixed external metric. Though related to familiar models of scalar fields as coordinates, our models have subtly different properties, both at kinematical and dynamical level. The energy-momentum tensor consists of two independently conserved parts. The background solution is the identity diffeomorphism and the energy-momentum tensor of this solution gives rise to an effective cosmological constant.
Cite
@article{arxiv.2012.04507,
title = {Dynamical diffeomorphisms},
author = {Renata Ferrero and Roberto Percacci},
journal= {arXiv preprint arXiv:2012.04507},
year = {2021}
}