Gravity Degrees of Freedom on a Null Surface
General Relativity and Quantum Cosmology
2017-05-17 v2 High Energy Physics - Theory
Abstract
A canonical analysis for general relativity is performed on a null surface without fixing the diffeomorphism gauge, and the canonical pairs of configuration and momentum variables are derived. Next to the well-known spin-2 pair, also spin-1 and spin-0 pairs are identified. The boundary action for a null boundary segment of spacetime is obtained, including terms on codimension two corners.
Cite
@article{arxiv.1611.03096,
title = {Gravity Degrees of Freedom on a Null Surface},
author = {Florian Hopfmüller and Laurent Freidel},
journal= {arXiv preprint arXiv:1611.03096},
year = {2017}
}
Comments
28 pages, 3 figures. Second version with minor edits