U(N) and holomorphic methods for LQG and Spin Foams

Details U(N) and holomorphic methods for LQG and Spin Foams U(N) and holomorphic methods for LQG and Spin Foams

2011-10-20

arxiv.org/abs/1110.4578v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

16 pages. Proceedings for the 3rd Quantum Geometry and Quantum Gravity School in Zakopane (2011)

Scientific paper

The U(N) framework and the spinor representation for loop quantum gravity are two new points of view that can help us deal with the most fundamental problems of the theory. Here, we review the detailed construction of the U(N) framework explaining how one can endow the Hilbert space of N-leg intertwiners with a Fock structure. We then give a description of the classical phase space corresponding to this system in terms of the spinors, and we will study its quantization using holomorphic techniques. We take special care in constructing the usual holonomy operators of LQG in terms of spinors, and in the description of the Hilbert space of LQG with the different polarization given by these spinors.

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