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3d Lorentzian, Dynamically Triangulated Quantum Gravity

J. Ambjorn, J. Jurkiewicz, R. Loll

hep-latarXiv:hep-lat/0201013

Abstract

The model of Lorentzian three-dimensional dynamical triangulations provides a non-perturbative definition of three-dimensional quantum gravity. The theory has two phases: a weak-coupling phase with quantum fluctuations around a ``semiclassical'' background geometry which is generated dynamically despite the fact that the formulation is explicitly background-independent, and a strong-coupling phase where ``classical'' space disintegrates into a foam of baby universes.

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