Crossing $w=-1$ by a single scalar on a Dvali-Gabadadze-Porrati brane

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dc.creatorZhang, Hongsheng
dc.creatorZhu, Zong-Hong
dc.date2006-11-28
dc.date2007-01-10
dc.date.accessioned2026-07-07T10:36:38Z
dc.date.available2026-07-07T10:36:38Z
dc.descriptionRecent type Ia supernovae data seem to favor a dark energy model whose equation of state $w(z)$ crosses -1, which is a much more amazing problem than the acceleration of the universe. Either the case that $w(z)$ evolves from above -1 to below -1 or the case that $w(z)$ runs from below -1 to above -1, is consistent with present data. In this paper we show that it is possible to realize the crossing behaviours of both of the two cases by only a single scalar field in frame of Dvali-Gabadadze-Porrati braneworld. At the same time we prove that there does not exist scaling solution in a universe with dust.
dc.description8 pages, 4 figs, several references added, minor correction
dc.identifierhttps://arxiv.org/abs/astro-ph/0611834
dc.identifierhttp://arxiv.org/abs/astro-ph/0611834
dc.identifierPhys.Rev.D75:023510,2007
dc.identifierdoi:10.1103/PhysRevD.75.023510
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180123
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.titleCrossing $w=-1$ by a single scalar on a Dvali-Gabadadze-Porrati brane
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