The Semiclassical Limit of Causal Dynamical Triangulations

Details The Semiclassical Limit of Causal Dynamical Triangulations The Semiclassical Limit of Causal Dynamical Triangulations

2011-02-18

arxiv.org/abs/1102.3929v1

Nucl.Phys.B849:144-165,2011

Physics

High Energy Physics

High Energy Physics - Theory

30 pages, 10 figures

Scientific paper

10.1016/j.nuclphysb.2011.03.019

Previous work has shown that the macroscopic structure of the theory of quantum gravity defined by causal dynamical triangulations (CDT) is compatible with that of a de Sitter universe. After emphasizing the strictly nonperturbative nature of this semiclassical limit we present a detailed study of the three-volume data, which allows us to re-confirm the de Sitter structure, exhibit short-distance discretization effects, and make a first detailed investigation of the presence of higher-order curvature terms in the effective action for the scale factor. Technically, we make use of a novel way of fixing the total four-volume in the simulations.

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