A new look at loop quantum gravity
General Relativity and Quantum Cosmology
2011-05-25 v4 High Energy Physics - Theory
Abstract
I describe a possible perspective on the current state of loop quantum gravity, at the light of the developments of the last years. I point out that a theory is now available, having a well-defined background-independent kinematics and a dynamics allowing transition amplitudes to be computed explicitly in different regimes. I underline the fact that the dynamics can be given in terms of a simple vertex function, largely determined by locality, diffeomorphism invariance and local Lorentz invariance. I emphasize the importance of approximations. I list open problems.
Cite
@article{arxiv.1004.1780,
title = {A new look at loop quantum gravity},
author = {Carlo Rovelli},
journal= {arXiv preprint arXiv:1004.1780},
year = {2011}
}
Comments
15 pages, 5 figures