The Nonperturbative Quantum de Sitter Universe

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dc.creatorAmbjorn, J.
dc.creatorGoerlich, A.
dc.creatorJurkiewicz, J.
dc.creatorLoll, R.
dc.date2008-07-28
dc.date2009-01-08
dc.date.accessioned2026-07-07T12:26:57Z
dc.date.available2026-07-07T12:26:57Z
dc.descriptionThe dynamical generation of a four-dimensional classical universe from nothing but fundamental quantum excitations at the Planck scale is a long-standing challenge to theoretical physicists. A candidate theory of quantum gravity which achieves this goal without invoking exotic ingredients or excessive fine-tuning is based on the nonperturbative and background-independent technique of Causal Dynamical Triangulations. We demonstrate in detail how in this approach a macroscopic de Sitter universe, accompanied by small quantum fluctuations, emerges from the full gravitational path integral, and how the effective action determining its dynamics can be reconstructed uniquely from Monte Carlo data. We also provide evidence that it may be possible to penetrate to the sub-Planckian regime, where the Planck length is large compared to the lattice spacing of the underlying regularization of geometry.
dc.descriptionArticle unchanged. Line added in acknowledgment
dc.identifierhttps://arxiv.org/abs/0807.4481
dc.identifierhttp://arxiv.org/abs/0807.4481
dc.identifierPhys.Rev.D78:063544,2008
dc.identifierdoi:10.1103/PhysRevD.78.063544
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215047
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.titleThe Nonperturbative Quantum de Sitter Universe
dc.typetext

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