期刊
MULTIVERSE AND FUNDAMENTAL COSMOLOGY: MULTICOSMOFUN '12
卷 1514, 期 -, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4791726
关键词
quantum gravity; nonperturbative quantization; causal dynamical triangulations; dynamical triangulations; lattice gravity
资金
- EU [291092]
- Dutch Foundation for Fundamental Research on Matter ( FOM)
- International PhD Projects Programme of the Foundation for Polish Science within the European Regional Development Fund of the European Union [MPD/ 2009/ 6]
We argue that theories of quantum gravity constructed with the help of (Causal) Dynamical Triangulations have given us the most informative, quantitative models to date of quantum spacetime. Most importantly, these are derived dynamically from nonperturbative and background-independent quantum theories of geometry. In the physically relevant case of four spacetime dimensions, the ansatz of Causal Dynamical Triangulations produces - from a fairly minimal set of quantum field-theoretic inputs - an emergent spacetime which macroscopically looks like a de Sitter universe, and on Planckian scales possesses unexpected quantum properties. Important in deriving these results are a regularized version of the theory, in which the quantum dynamics is well defined, can be studied with the help of numerical Monte Carlo methods and extrapolated to infinite lattice volumes.
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