Stability of the curvature perturbation in dark sectors' mutual interacting models

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dc.creatorHe, Jian-Hua
dc.creatorWang, Bin
dc.creatorAbdalla, Elcio
dc.date2008-07-22
dc.date2008-11-26
dc.date.accessioned2026-07-07T12:30:13Z
dc.date.available2026-07-07T12:30:13Z
dc.descriptionWe consider perturbations in a cosmological model with a small coupling between dark energy and dark matter. We prove that the stability of the curvature perturbation depends on the type of coupling between dark sectors. When the dark energy is of quintessence type, if the coupling is proportional to the dark matter energy density, it will drive the instability in the curvature perturbations; however if the coupling is proportional to the energy density of dark energy, there is room for the stability in the curvature perturbations. When the dark energy is of phantom type, the perturbations are always stable, no matter whether the coupling is proportional to the one or the other energy density.
dc.description9 page, 4 figures, revised version, accepted for publication in PLB
dc.identifierhttps://arxiv.org/abs/0807.3471
dc.identifierhttp://arxiv.org/abs/0807.3471
dc.identifierPhys.Lett.B671:139-145,2009
dc.identifierdoi:10.1016/j.physletb.2008.11.062
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/216067
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Theory
dc.titleStability of the curvature perturbation in dark sectors' mutual interacting models
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