] performed a numerical investigation of the phase structure of
Smolin's model. Using the compact group
SO
(5) and its associated Haar measure, their findings confirmed the
two-phase structure: a strong-coupling phase with a confining
property and presence of exponential clustering, and a
weak-coupling phase dominated by a class of topological
configurations, with vanishing vierbein. However, their Monte
Carlo data (on
and
-lattices with periodic boundary conditions) indicated strongly
that the transition was first-order, even if the measure was
generalized by a factor of
,
[67].
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Discrete Approaches to Quantum Gravity in Four Dimensions
Renate Loll http://www.livingreviews.org/lrr-1998-13 © Max-Planck-Gesellschaft. ISSN 1433-8351 Problems/Comments to livrev@aei-potsdam.mpg.de |