Divergences and Orientation in Spinfoams
General Relativity and Quantum Cosmology
2013-02-07 v1
Abstract
We suggest that large radiative corrections appearing in the spinfoam framework might be tied to the implicit sum over orientations. Specifically, we show that in a suitably simplified context the characteristic "spike" divergence of the Ponzano-Regge model disappears when restricting the theory to just one of the two orientations appearing in the asymptotic limit of the vertex amplitude.
Keywords
Cite
@article{arxiv.1207.5156,
title = {Divergences and Orientation in Spinfoams},
author = {Marios Christodoulou and Miklos Långvik and Aldo Riello and Christian Röken and Carlo Rovelli},
journal= {arXiv preprint arXiv:1207.5156},
year = {2013}
}
Comments
10 pages, 5 figures