How to detect an anti-spacetime
General Relativity and Quantum Cosmology
2015-06-05 v1 High Energy Physics - Theory
Abstract
Is it possible, in principle, to measure the sign of the Lapse? We show that fermion dynamics distinguishes spacetimes having the same metric but different tetrads, for instance a Lapse with opposite sign. This sign might be a physical quantity not captured by the metric. We discuss its possible role in quantum gravity.
Keywords
Cite
@article{arxiv.1206.3903,
title = {How to detect an anti-spacetime},
author = {Marios Christodoulou and Aldo Riello and Carlo Rovelli},
journal= {arXiv preprint arXiv:1206.3903},
year = {2015}
}
Comments
Article awarded with an "Honorable Mention" from the 2012 Gravity Foundation Award. 6 pages, 8 (pretty) figures