Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2009-07-15
Phys.Rev.D81:084048,2010
Physics
High Energy Physics
High Energy Physics - Theory
39 pages, 10 figures
Scientific paper
10.1103/PhysRevD.81.084048
Results for the gravitational Wilson loop, in particular the area law for large loops in the strong coupling region, and the argument for an effective positive cosmological constant discussed in a previous paper, are extended to other proposed theories of discrete quantum gravity in the strong coupling limit. We argue that the area law is a generic feature of almost all non-perturbative lattice formulations, for sufficiently strong gravitational coupling. The effects on gravitational Wilson loops of the inclusion of various types of light matter coupled to lattice quantum gravity are discussed as well. One finds that significant modifications to the area law can only arise from extremely light matter particles. The paper ends with some general comments on possible physically observable consequences.
Hamber Herbert W.
Williams Ruth M.
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