Quasilocal conservation laws in cosmology: a first look
General Relativity and Quantum Cosmology
2021-02-03 v1 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
Quasilocal definitions of stress-energy-momentum---that is, in the form of boundary densities (in lieu of local volume densities)---have proven generally very useful in formulating and applying conservation laws in general relativity. In this essay, we take a first basic look into applying these to cosmology, specifically using the Brown-York quasilocal stress-energy-momentum tensor for matter and gravity combined. We compute this tensor and present some simple results for a flat FLRW spacetime with a perfect fluid matter source.
Keywords
Cite
@article{arxiv.2006.06001,
title = {Quasilocal conservation laws in cosmology: a first look},
author = {Marius Oltean and Hossein Bazrafshan Moghaddam and Richard J. Epp},
journal= {arXiv preprint arXiv:2006.06001},
year = {2021}
}
Comments
8 pages, 3 figures. Essay awarded Honorable Mention in the Gravity Research Foundation 2020 Awards for Essays on Gravitation