Avoiding the Big-Rip Jeopardy in a Quintom Dark Energy Model with Higher Derivatives

Xiao-fei Zhang; Taotao Qiu

doi:10.1016/j.physletb.2006.09.038

Avoiding the Big-Rip Jeopardy in a Quintom Dark Energy Model with Higher Derivatives

Astrophysics 2011-05-24 v2 General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory

Authors: Xiao-fei Zhang , Taotao Qiu

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Abstract

In the framework of a single scalar field quintom model with higher derivative, we construct in this paper a dark energy model of which the equation of state (EOS) $w$ crosses over the cosmological constant boundary. Interestingly during the evolution of the universe $w<-1$ happens just for a period of time with a distinguished feature that $w$ starts with a value above -1, transits into $w<-1$ , then comes back to $w>-1$ . This avoids the Big Rip jeopardy induced by $w<-1$ .

Keywords

dark energy quintom model equation of state cosmology Big Rip higher derivatives scalar field

Cite

@article{arxiv.astro-ph/0603824,
  title  = {Avoiding the Big-Rip Jeopardy in a Quintom Dark Energy Model with Higher Derivatives},
  author = {Xiao-fei Zhang and Taotao Qiu},
  journal= {arXiv preprint arXiv:astro-ph/0603824},
  year   = {2011}
}

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7 pages, 3 figures

Avoiding the Big-Rip Jeopardy in a Quintom Dark Energy Model with Higher Derivatives

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