A new look at loop quantum gravity

Details A new look at loop quantum gravity A new look at loop quantum gravity

2010-04-11

arxiv.org/abs/1004.1780v4

Class.Quant.Grav.28:114005,2011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, 5 figures

Scientific paper

10.1088/0264-9381/28/11/114005

I describe a possible perspective on the current state of loop quantum gravity, at the light of the developments of the last years. I point out that a theory is now available, having a well-defined background-independent kinematics and a dynamics allowing transition amplitudes to be computed explicitly in different regimes. I underline the fact that the dynamics can be given in terms of a simple vertex function, largely determined by locality, diffeomorphism invariance and local Lorentz invariance. I emphasize the importance of approximations. I list open problems.

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