Background independence in a nutshell
General Relativity and Quantum Cosmology
2009-11-10 v1
Abstract
We study how physical information can be extracted from a background independent quantum system. We use an extremely simple `minimalist' system that models a finite region of 3d euclidean quantum spacetime with a single equilateral tetrahedron. We show that the physical information can be expressed as a boundary amplitude. We illustrate how the notions of "evolution" in a boundary proper-time and "vacuum" can be extracted from the background independent dynamics.
Cite
@article{arxiv.gr-qc/0408079,
title = {Background independence in a nutshell},
author = {Carlo Rovelli and Daniele Colosi and Luisa Doplicher and Winston Fairbairn and Leonardo Modesto and Karim Noui},
journal= {arXiv preprint arXiv:gr-qc/0408079},
year = {2009}
}
Comments
19 pages, 19 figures