Stationary dark energy: the present universe as a global attractor

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dc.creatorAmendola, Luca
dc.creatorTocchini-Valentini, Domenico
dc.date2000-11-13
dc.date2000-12-05
dc.date.accessioned2026-07-07T10:31:03Z
dc.date.available2026-07-07T10:31:03Z
dc.descriptionWe propose a cosmological model that makes a significant step toward solving the coincidence problem of the near similarity at the present of the dark energy and dark matter components. Our cosmology has the following properties: a) among flat and homogeneous spaces, the present universe is a global attractor: all the possible initial conditions lead to the observed proportion of dark energy and dark matter; once reached, it remains fixed forever; b) the expansion is accelerated at the present, as requested by the supernovae observations; c) the model is consistent with the large-scale structure and microwave background data; d) the dark energy and the dark matter densities always scale similarly after equivalence and are close to within two orders of magnitude. The model makes use of a non-linear coupling of the dark energy to the dark matter that switches on after structure formation.
dc.description5 pages, 4 figures, submitted to Phys. Rev. Lett. Minor revision (added some refs, shortened to match PRL requirements)
dc.identifierhttps://arxiv.org/abs/astro-ph/0011243
dc.identifierhttp://arxiv.org/abs/astro-ph/0011243
dc.identifierPhys.Rev.D64:043509,2001
dc.identifierdoi:10.1103/PhysRevD.64.043509
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/178286
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleStationary dark energy: the present universe as a global attractor
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