Spin Foam Models of Yang-Mills Theory Coupled to Gravity

Abstract

We construct a spin foam model of Yang-Mills theory coupled to gravity by using a discretized path integral of the BF theory with polynomial interactions and the Barret-Crane ansatz. In the Euclidian gravity case we obtain a vertex amplitude which is determined by a vertex operator acting on a simple spin network function. The Euclidian gravity results can be straightforwardly extended to the Lorentzian case, so that we propose a Lorentzian spin foam model of Yang-Mills theory coupled to gravity.

arXiv comment10 pages

References in corpus (7)

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• Topological Lattice Models in Four Dimensions
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