Two-field quintom models in thew−w′plane

2006/08/31 by Zong-Kuan Guo, Zong‐Kuan Guo, Yun-Song Piao +3 · 2 citations
Mathematics · Physics and Astronomy · #Algorithm #Artificial intelligence #Black Holes and Theoretical Physics #Computer science #Cosmology and Gravitation Theories #Field (mathematics) #Galaxies: Formation, Evolution, Phenomena #Logarithm #Mathematical analysis #Mathematics #Physics #Pure mathematics #astro-ph

paper · pdf · doi:10.1103/physrevd.74.127304

published as Phys.Rev.D74:127304,2006 · 5 pages, 2 figures, RevTeX, Accepted for publication as a Brief Report in Physical Review D

arxiv created 2006/12/06 · openalex publication_date 2006/12/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The w\ensuremath-w^\ensuremath' plane, defined by the equation of state parameter for the dark energy and its derivative with respect to the logarithm of the scale factor, is useful to the study of classifying the dynamical dark energy models. In this note, we examine the evolving behavior of the two-field quintom models with w crossing the w=\ensuremath-1 barrier in the w\ensuremath-w^\ensuremath' plane. We find that these models can be divided into two categories, type A quintom in which w changes from >\ensuremath-1 to <\ensuremath-1 and type B quintom in which w changes from <\ensuremath-1 to >\ensuremath-1 as the universe expands.

Citations

• Superacceleration as the signature of a dark sector interaction
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Cited by

• CYCLIC UNIVERSE WITH QUINTOM MATTER IN LOOP QUANTUM COSMOLOGY
• The three-loop Yang–Mills condensate dark energy model and its cosmological constraints