期刊
SIXTH INTERNATIONAL SCHOOL ON FIELD THEORY AND GRAVITATION-2012
卷 1483, 期 -, 页码 455-460出版社
AMER INST PHYSICS
DOI: 10.1063/1.4756993
关键词
Causal dynamical triangulations (CDT); spectral dimension; random walks on graphs
We review a recently introduced effective graph approximation of causal dynamical triangulations (CDT), the multigraph ensemble. We argue that it is well suited for analytical computations and that it captures the physical degrees of freedom which are important for the reduction of the spectral dimension as observed in numerical simulations of CDT. In addition multigraph models allow us to study the relationship between the spectral dimension and the Hausdorff dimension, thus establishing a link to other approaches to quantum gravity.
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