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Apparently some lattice gauge theories can be formulated as spin foams. Conrady even says "The concept of spin foams is both new and old. It is old in the sense that it is just another name for the plaquette diagrams that appear in the strong coupling expansion of lattice gauge theories". Do these lattice gauge theories have any gravity dual in the AdS/CFT sense?
Reisenberger, http://arxiv.org/abs/gr-qc/9412035
Oeckl and Pfeiffer, http://arxiv.org/abs/hep-th/0008095
Conrady, http://arxiv.org/abs/gr-qc/0504059v2
Reisenberger, http://arxiv.org/abs/gr-qc/9412035
Oeckl and Pfeiffer, http://arxiv.org/abs/hep-th/0008095
Conrady, http://arxiv.org/abs/gr-qc/0504059v2