Continuum spin foam model for 3d gravity

Details Continuum spin foam model for 3d gravity Continuum spin foam model for 3d gravity

2002-05-09

arxiv.org/abs/gr-qc/0205037v1

J.Math.Phys. 43 (2002) 5612-5623

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, 3 figures

Scientific paper

10.1063/1.1509850

An example illustrating a continuum spin foam framework is presented. This covariant framework induces the kinematics of canonical loop quantization, and its dynamics is generated by a {\em renormalized} sum over colored polyhedra. Physically the example corresponds to 3d gravity with cosmological constant. Starting from a kinematical structure that accommodates local degrees of freedom and does not involve the choice of any background structure (e. g. triangulation), the dynamics reduces the field theory to have only global degrees of freedom. The result is {\em projectively} equivalent to the Turaev-Viro model.

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