Karlsruhe 2011 – wissenschaftliches Programm
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GR: Fachverband Gravitation und Relativitätstheorie
GR 7: Hauptvorträge Mittwoch: Quantengravitation und Quantengravitationsphänomenologie (gemeinsam mit MP)
GR 7.2: Hauptvortrag
Mittwoch, 30. März 2011, 17:30–18:15, 20.40: 101
Causal Dynamical Triangulation - A Gateway to Quantum Gravity — •Renate Loll1, Jan Ambjorn2, and Jerzy Jurkiewicz3 — 1Institute for Theoretical Physics, Utrecht University, Utrecht, The Netherlands — 2Niels Bohr Institute, Copenhagen University, Copenhagen, Denmark — 3Jagiellonian University, Krakow, Poland
The nonperturbative theory of Quantum Gravity constructed using the method of Causal Dynamical Triangulation (CDT) has made considerable progress in explaining the macroscopic structure of spacetime from first (quantum) principles. This includes the ``postdictions" that spacetime on large scales is four-dimensional and - in the absence of matter - looks like a de Sitter universe. By contrast, near the Planck scale, spacetime behaves highly non-classically and exhibits two-dimensional features, for which corroborating evidence has meanwhile been found in several other approaches. After summarizing the rationale behind CDT and its main achievements, I will highlight some new results and insights, including CDT's phase structure, which may provide a blueprint for models of dynamical, higher-dimensional geometry, as well as short- and large-scale geometric properties of the dynamically generated quantum universe and their potential implications for quantum cosmology.