2006/11/30 by Hongsheng Zhang, Israel Quiros, Zong-Hong Zhu +3 · 8 citations
Mathematics · Physics and Astronomy · #Advanced Differential Geometry Research #Artificial intelligence #Computer science #Mathematical Dynamics and Fractals #advanced mathematical theories #astro-ph #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.75.023510
published as Phys.Rev.D75:023510,2007 · 5 pages, 8 eps figures
openalex publication_date 2007/01/09 · arxiv created 2008/12/09 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Recent type Ia supernovae data seem to favor a dark energy model whose equation of state w(z) crosses \ensuremath-1, which is a much more amazing problem than the acceleration of the universe. Either the case that w(z) evolves from above \ensuremath-1 to below \ensuremath-1 or the case that w(z) runs from below \ensuremath-1 to above \ensuremath-1, is consistent with present data. In this paper we show that it is possible to realize the crossing behaviors 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.