Quantum gravity, dynamical triangulations and higher-derivative regularization
Research output: Contribution to journal › Journal article › Research › peer-review
We consider a discrete model of euclidean quantum gravity in four dimensions based on a summation over random simplicial manifolds. The action used is the Einstein-Hilbert action plus an R2 term. The phase diagram as a function of the bare coupling constants is studied in the search for a sensible continuum limit. For small values of the coupling constant of the R2 term the model seems to belong to the same universality class as the model with pure Einstein-Hilbert action and exhibits the same phase transition. The order of the transition may be second or higher. The average curvature is positive at the phase transition, which makes it difficult to understand the possible scaling relations of the model.
Original language | English |
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Journal | Nuclear Physics B |
Volume | 393 |
Issue number | 3 |
Pages (from-to) | 601-629 |
ISSN | 0550-3213 |
DOIs | |
Publication status | Published - 29 Mar 1993 |
ID: 281247