Regularized Hamiltonians and Spinfoams

Details Regularized Hamiltonians and Spinfoams Regularized Hamiltonians and Spinfoams

2011-10-27

arxiv.org/abs/1110.6150v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, based on a talk given at Loops '11 in Madrid, to appear in Journal of Physics: Conference Series (JPCS)

Scientific paper

We review a recent proposal for the regularization of the scalar constraint of General Relativity in the context of LQG. The resulting constraint presents strengths and weaknesses compared to Thiemann's prescription. The main improvement is that it can generate the 1-4 Pachner moves and its matrix elements contain 15j Wigner symbols, it is therefore compatible with the spinfoam formalism: the drawback is that Thiemann anomaly free proof is spoiled because the nodes that the constraint creates have volume.

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