Predictability crisis in inflationary cosmology and its resolution

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dc.creatorVanchurin, Vitaly
dc.creatorVilenkin, Alexander
dc.creatorWinitzki, Serge
dc.date1999-05-25
dc.date1999-09-29
dc.date.accessioned2026-07-07T10:31:59Z
dc.date.available2026-07-07T10:31:59Z
dc.descriptionModels of inflationary cosmology can lead to variation of observable parameters ("constants of Nature") on extremely large scales. The question of making probabilistic predictions for today's observables in such models has been investigated in the literature. Because of the infinite thermalized volume resulting from eternal inflation, it has proven difficult to obtain a meaningful and unambiguous probability distribution for observables, in particular due to the gauge dependence. In the present paper, we further develop the gauge-invariant procedure proposed in a previous work for models with a continuous variation of "constants". The recipe uses an unbiased selection of a connected piece of the thermalized volume as sample for the probability distribution. To implement the procedure numerically, we develop two methods applicable to a reasonably wide class of models: one based on the Fokker-Planck equation of stochastic inflation, and the other based on direct simulation of inflationary spacetime. We present and compare results obtained using these methods.
dc.description23 pages, 13 figures
dc.identifierhttps://arxiv.org/abs/gr-qc/9905097
dc.identifierhttp://arxiv.org/abs/gr-qc/9905097
dc.identifierPhys.Rev.D61:083507,2000
dc.identifierdoi:10.1103/PhysRevD.61.083507
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178606
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titlePredictability crisis in inflationary cosmology and its resolution
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