Boundary terms in the Barrett-Crane spin foam model and consistent gluing
General Relativity and Quantum Cosmology
2009-11-07 v2 High Energy Physics - Theory
Abstract
We extend the lattice gauge theory-type derivation of the Barrett-Crane spin foam model for quantum gravity to other choices of boundary conditions, resulting in different boundary terms, and re-analyze the gluing of 4-simplices in this context. This provides a consistency check of the previous derivation. Moreover we study and discuss some possible alternatives and variations that can be made to it and the resulting models.
Keywords
Cite
@article{arxiv.gr-qc/0201077,
title = {Boundary terms in the Barrett-Crane spin foam model and consistent gluing},
author = {Daniele Oriti},
journal= {arXiv preprint arXiv:gr-qc/0201077},
year = {2009}
}
Comments
10 pages, 2 figures, revtex; v2: typos in some formulas corrected, version appeared in journal