Abstract
Considering the Barrett-Crane spin foam model for quantum gravity with a (positive) cosmological constant, we show that speeds must be quantized, and we investigate the physical implications of this effect such as the emergence of an effective deformed Poincaré symmetry.
- Received 25 November 2003
DOI:https://doi.org/10.1103/PhysRevD.69.104024
©2004 American Physical Society