Non-local dilaton coupling to dark matter: cosmic acceleration and pressure backreaction

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dc.creatorAmendola, L.
dc.creatorGasperini, M.
dc.creatorUngarelli, C.
dc.date2007-11-30
dc.date.accessioned2026-07-07T11:39:04Z
dc.date.available2026-07-07T11:39:04Z
dc.descriptionA model of non-local dilaton interactions, motivated by string duality symmetries, is applied to a scenario of "coupled quintessence" in which the dilaton dark energy is non-locally coupled to the dark-matter sources. It is shown that the non-local effects tend to generate a backreaction which -- for strong enough coupling -- can automatically compensate the acceleration due to the negative pressure of the dilaton potential, thus asymptotically restoring the standard (dust-dominated) decelerated regime. This result is illustrated by analytical computations and numerical examples.
dc.description11 pages, 1 figure eps
dc.identifierhttps://arxiv.org/abs/0711.5022
dc.identifierhttp://arxiv.org/abs/0711.5022
dc.identifierPhys.Rev.D77:123526,2008
dc.identifierdoi:10.1103/PhysRevD.77.123526
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/199784
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleNon-local dilaton coupling to dark matter: cosmic acceleration and pressure backreaction
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