期刊
NUCLEAR PHYSICS B
卷 807, 期 1-2, 页码 251-264出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysb.2008.08.030
关键词
Nonperturbative quantum gravity; Causal dynamical triangulations; Gravity-matter systems; Monte Carlo numerical calculations
资金
- National Technical University [PEBE2008]
- ENRAGE (European Network on Random Geometry)
- Marie Curie Research Training Network in the European Community's Sixth Framework Programme [MRTN-CT-2004-005616]
- Netherlands Organisation for Scientific Research (NWO)
We investigate the critical behaviour of both matter and geometry of the three-state Potts model coupled to two-dimensional Lorentzian quantum gravity in the framework of causal dynamical triangulations. Contrary to what general arguments on the effects of disorder suggest, we find strong numerical evidence that the critical exponents of the matter are not changed under the influence of quantum fluctuations in the geometry, compared to their values on fixed, regular lattices. This lends further support to previous findings that quantum gravity models based on causal dynamical triangulations are in many ways better behaved than their Euclidean counterparts. (C) 2008 Elsevier B.V. All rights reserved.
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