Gauge invariant averages for the cosmological backreaction
General Relativity and Quantum Cosmology
2009-03-24 v3 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We show how to provide suitable gauge invariant prescriptions for the classical spatial averages (resp. quantum expectation values) that are needed in the evaluation of classical (resp. quantum) backreaction effects. We also present examples illustrating how the use of gauge invariant prescriptions can avoid interpretation problems and prevent misleading conclusions.
Keywords
Cite
@article{arxiv.0901.1303,
title = {Gauge invariant averages for the cosmological backreaction},
author = {M. Gasperini and G. Marozzi and G. Veneziano},
journal= {arXiv preprint arXiv:0901.1303},
year = {2009}
}
Comments
21 pages, no figures. Comments and references added, typos corrected. Small corrections and reference added, matches version published in JCAP