Scalar Fields Coupled to FourDimensional Lattice Gravity
Abstract
I discuss some results we have obtained recently in a lattice model for quantized gravity coupled to scalar matter in four dimensions. We have looked at how the continuous phase transition separating the smooth from the rough phase of gravity is influenced by the presence of the scalar field. We find that close to the critical point, where the average curvature approaches zero, the effects of the scalar field are small and the coupling of matter to gravity seems to be weak. The nature of the phase diagram and the values for the critical exponents would suggest that gravitational interactions increase with distance.
 Publication:

arXiv eprints
 Pub Date:
 October 1993
 arXiv:
 arXiv:hepth/9310152
 Bibcode:
 1993hep.th...10152H
 Keywords:

 High Energy Physics  Theory
 EPrint:
 (Talk presented at the Europhysics Conference on High Energy Physics, Marseille, France, July 2228, 1993) (3 pages)