Quantization of Lorentzian 3d Gravity by Partial Gauge Fixing

Details Quantization of Lorentzian 3d Gravity by Partial Gauge Fixing Quantization of Lorentzian 3d Gravity by Partial Gauge Fixing

2012-04-24

arxiv.org/abs/1204.5455v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

19 pqges, Latex

Scientific paper

D = 2+1 gravity with a cosmological constant has been shown by Bonzom and Livine to present a Barbero-Immirzi like ambiguity depending on a parameter. We make use of this fact to show that, for positive cosmological constant, the Lorentzian theory can be partially gauge fixed and reduced to an SU(2) Chern-Simons theory. We then review the already known quantization of the latter in the framework of Loop Quantization for the case of space being topogically a cylinder. We finally construct, in the same setting, a quantum observable which, although non-trivial at the quantum level, corresponds to a null classical quantity.

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