Studies in Random Geometries: Hypercubic Random Surfaces and Simplicial Quantum Gravity

Details Studies in Random Geometries: Hypercubic Random Surfaces and Simplicial Quantum Gravity Studies in Random Geometries: Hypercubic Random Surfaces and Simplicial Quantum Gravity

1998-05-08

arxiv.org/abs/hep-lat/9805006v1

Physics

High Energy Physics

High Energy Physics - Lattice

PHD-Thesis, slightly modified version

Scientific paper

We analyze two models of random geometries~: planar hyper-cubic random surfaces and four dimensional simplicial quantum gravity. We show for the hyper-cubic random surface model that a geometrical constraint does not change the critical properties of the model compared to the model without this constraint. We analyze the phase diagram for the model with extrinsic curvature. For four dimensional simplicial quantum gravity we find that in the large volume limit the leading contribution to the entropy does not depend on the underlying topology. We find for the first time a strong back-reaction of the geometric sector for matter coupled to gravity.

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