On the possibility of finite quantum Regge calculus

Details On the possibility of finite quantum Regge calculus On the possibility of finite quantum Regge calculus

2006-12-22

arxiv.org/abs/gr-qc/0612143v3

Phys.Lett.B651:388-393,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, plain LaTeX, readability improved, matches version to be published

Scientific paper

10.1016/j.physletb.2007.06.039

The arguments were given in a number of our papers that the discrete quantum gravity based on the Regge calculus possesses nonzero vacuum expectation values of the triangulation lengths of the order of Plank scale $10^{-33}cm$. These results are considered paying attention to the form of the path integral measure showing that probability distribution for these linklengths is concentrated at certain nonzero finite values of the order of Plank scale. That is, the theory resembles an ordinary lattice field theory with fixed spacings for which correlators (Green functions) are finite, UV cut off being defined by lattice spacings. The difference with an ordinary lattice theory is that now lattice spacings (linklengths) are themselves dynamical variables, and are concentrated around certain Plank scale values due to {\it dynamical} reasons.

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