Gravitational Action Versus Entropy on Simplicial Lattices in Four Dimensions

Details Gravitational Action Versus Entropy on Simplicial Lattices in Four Dimensions Gravitational Action Versus Entropy on Simplicial Lattices in Four Dimensions

1992-11-17

arxiv.org/abs/hep-lat/9211044v1

Nucl. Phys. Proc. Suppl. 30 (1993) 764

Physics

High Energy Physics

High Energy Physics - Lattice

5 pages

Scientific paper

10.1016/0920-5632(93)90320-6

We investigate quantum gravity on simplicial lattices using Regge calculus with special emphasize on the problem of the unbounded action. The role of the entropy for the path integral is discussed in detail. Our numerical results show further evidence for the existence of an entropy dominated region with well defined expectation values even for unbounded action. Analyses are performed both for the standard regular triangulation of the 4-torus and for irregularly triangulated lattices obtained by insertion of vertices using barycentric subdivision.

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