Breaking and restoring of diffeomorphism symmetry in discrete gravity
General Relativity and Quantum Cosmology
2015-05-14 v1 High Energy Physics - Lattice
High Energy Physics - Theory
Abstract
We discuss the fate of diffeomorphism symmetry in discrete gravity. Diffeomorphism symmetry is typically broken by the discretization. This has repercussions for the observable content and the canonical formulation of the theory. It might however be possible to construct discrete actions, so--called perfect actions, with exact symmetries and we will review first steps towards this end.
Keywords
Cite
@article{arxiv.0909.5688,
title = {Breaking and restoring of diffeomorphism symmetry in discrete gravity},
author = {B. Bahr and B. Dittrich},
journal= {arXiv preprint arXiv:0909.5688},
year = {2015}
}
Comments
to appear in the Proceedings of the XXV Max Born Symposium "The Planck Scale", Wroclaw, 29 June - 3 July, 2009