Dynamical vacuum energy via adjustment mechanism

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dc.creatorDolgov, A. D.
dc.creatorUrban, F. R.
dc.date2008-01-20
dc.date2008-04-07
dc.date.accessioned2026-07-07T11:14:06Z
dc.date.available2026-07-07T11:14:06Z
dc.descriptionA new mechanism of adjustment of vacuum energy down to the observed value from an initially huge one is considered. The mechanism is based on a very strong variation of the gravitational coupling constant in very early universe. The model predicts that the non--compensated remnant of vacuum energy changes very slowly at late stages of the cosmological evolution and is naturally close to the observed one. Asymptotically the effective vacuum energy tends to a negative value, so the cosmological expansion should stop and turn into contraction. There remains the problem of introduction of the usual matter into the model and therefore realising realistic cosmology.
dc.description12 pages, v2 with minor grammatical changes and one reference added. Published in PRD
dc.identifierhttps://arxiv.org/abs/0801.3090
dc.identifierhttp://arxiv.org/abs/0801.3090
dc.identifierPhys.Rev.D77:083503,2008
dc.identifierdoi:10.1103/PhysRevD.77.083503
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/191950
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDynamical vacuum energy via adjustment mechanism
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