Lorentzian 3d Gravity with Wormholes via Matrix Models

Details Lorentzian 3d Gravity with Wormholes via Matrix Models Lorentzian 3d Gravity with Wormholes via Matrix Models

2001-06-11

arxiv.org/abs/hep-th/0106082v1

JHEP 0109:022,2001

Physics

High Energy Physics

High Energy Physics - Theory

35 pages, 9 figures

Scientific paper

10.1088/1126-6708/2001/09/022

We uncover a surprising correspondence between a non-perturbative formulation of three-dimensional Lorentzian quantum gravity and a hermitian two-matrix model with ABAB-interaction. The gravitational transfer matrix can be expressed as the logarithm of a two-matrix integral, and we deduce from the known structure of the latter that the model has two phases. In the phase of weak gravity, well-defined two-dimensional universes propagate in proper time, whereas in the strong-coupling phase the spatial hypersurfaces disintegrate into many components connected by wormholes.

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