Causality in spin foam models for quantum gravity

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We describe how the Barrett-Crane spin foam model defines transition amplitudes for quantum gravity states and how causality can be consistently implemented in it.
6 pages; uses IOP conference macros; to appear in the Proceedings of the 15th SIGRAV Conference on General Relativity and Gravitational Physics

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General Relativity and Quantum Cosmology

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http://salesiana.dossiersoluciones.com/handle/123456789/34500

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/gr-qc/0302018
 http://arxiv.org/abs/gr-qc/0302018

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arXiv