Correlation functions in lattice formulations of quantum gravity
  We compare different models of a quantum theory of four-dimensional lattice gravity based on Regge's original proposal. From Monte Carlo simulations we calculate two-point functions between geometrical quantities and estimate the masses of the corresponding interaction particles. 
W. Beirl, A. Hauke, P. Homolka, H. Markum and J. Riedler (Institut f.   Kernphysik, Vienna University of Technology)