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25 September 2022
 
  » arxiv » hep-th/0401076

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Ponzano-Regge model revisited I: Gauge fixing, observables and interacting spinning particles
Laurent Freidel ; David Louapre ;
Date 12 Dec 2003
Journal Class.Quant.Grav. 21 (2004) 5685-5726
Subject hep-th gr-qc
AbstractWe show how to properly gauge fix all the symmetries of the Ponzano-Regge model for 3D quantum gravity. This amounts to do explicit finite computations for transition amplitudes. We give the construction of the transition amplitudes in the presence of interacting quantum spinning particles. We introduce a notion of operators whose expectation value gives rise to either gauge fixing, introduction of time, or insertion of particles, according to the choice. We give the link between the spin foam quantization and the hamiltonian quantization. We finally show the link between Ponzano-Regge model and the quantization of Chern-Simons theory based on the double quantum group of SU(2)
Source arXiv, hep-th/0401076
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