4D simplicial quantum gravity with a nontrivial measure

Bernd Brügmann, Enzo Marinari
1993 Physical Review Letters  
We study 4d simplicial quantum gravity in the dynamical triangulation approach with a non-trivial class of measures. We find that the measure contribution plays an important role, influencing the phase diagram and the nature of the (possible) critical theory. We discuss how the lattice theory could be used to fix the quantum measure in a non-ambiguous way.
doi:10.1103/physrevlett.70.1908 pmid:10053417 fatcat:cdcu2cwjg5f4jjviggi45tol2q