A Causal Alternative for c=0 Strings
| Autor: | Jan Ambjorn, Loll, R., Watabiki, Y., Westra, W., Zohren, S. |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | University of Copenhagen |
| DOI: | 10.48550/arxiv.0810.2503 |
| Popis: | We review a recently discovered continuum limit for the one-matrix model which describes "causal" two-dimensional quantum gravity. The behaviour of the quantum geometry in this limit is different from the quantum geometry of Euclidean two-dimensional quantum gravity defined by taking the "standard" continuum limit of the one-matrix model. Geodesic distance and time scale with canonical dimensions in this new limit, contrary to the situation in Euclidean two-dimensional quantum gravity. Remarkably, whenever we compare, the known results of (generalized) causal dynamical triangulations are reproduced exactly by the one-matrix model. We complement previous results by giving a geometrical interpretation of the new model in terms of a generalization of the loop equation of Euclidean dynamical triangulations. In addition, we discuss the time evolution of the quantum geometry. Comment: 10 pages, 4 figures, Presented at "The 48th Cracow School of Theoretical Physics: Aspects of Duality", June 13-22, 2008, Zakopane, Poland |
| Databáze: | OpenAIRE |
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