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The Semiclassical Limit of Causal Dynamical Triangulations

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.

preprint2011arXivOpen access
J. AmbjornA. GorlichJ. JurkiewiczR. LollJ. Gizbert-StudnickiT. Trzesniewski
gr-qchep-lathep-th
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J. AmbjornA. GorlichJ. JurkiewiczR. LollJ. Gizbert-StudnickiT. Trzesniewski

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