The Emergence of Spacetime, or, Quantum Gravity on Your Desktop

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dc.creatorLoll, R.
dc.date2007-11-02
dc.date2008-04-16
dc.date.accessioned2026-07-07T11:53:57Z
dc.date.available2026-07-07T11:53:57Z
dc.descriptionIs there an approach to quantum gravity which is conceptually simple, relies on very few fundamental physical principles and ingredients, emphasizes geometric (as opposed to algebraic) properties, comes with a definite numerical approximation scheme, and produces robust results, which go beyond showing mere internal consistency of the formalism? The answer is a resounding yes: it is the attempt to construct a nonperturbative theory of quantum gravity, valid on all scales, with the technique of so-called Causal Dynamical Triangulations. Despite its conceptual simplicity, the results obtained up to now are far from trivial. Most remarkable at this stage is perhaps the fully dynamical emergence of a classical background (and solution to the Einstein equations) from a nonperturbative sum over geometries, without putting in any preferred geometric background at the outset. In addition, there is concrete evidence for the presence of a fractal spacetime foam on Planckian distance scales. The availability of a computational framework provides built-in reality checks of the approach, whose importance can hardly be overestimated.
dc.description22 pages, 11 figures, final version includes small clarifications/amendments in response to referee comments, to appear in CQG
dc.identifierhttps://arxiv.org/abs/0711.0273
dc.identifierhttp://arxiv.org/abs/0711.0273
dc.identifierClass.Quant.Grav.25:114006,2008
dc.identifierdoi:10.1088/0264-9381/25/11/114006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204726
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Theory
dc.titleThe Emergence of Spacetime, or, Quantum Gravity on Your Desktop
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