Properties of singularities in the (phantom) dark energy universe

Shin'ichi Nojiri, Sergei D. Odintsov, Shinji Tsujikawa

Research output: Contribution to journalArticle

856 Citations (Scopus)

Abstract

The properties of future singularities are investigated in the universe dominated by dark energy including the phantom-type fluid. We classify the finite-time singularities into four classes and explicitly present the models which give rise to these singularities by assuming the form of the equation of state of dark energy. We show the existence of a stable fixed point with an equation of state w < -1 and numerically confirm that this is actually a late-time attractor in the phantom-dominated universe. We also construct a phantom dark energy scenario coupled to dark matter that reproduces singular behaviors of the Big Rip type for the energy density and the curvature of the universe. The effect of quantum corrections coming from conformal anomaly can be important when the curvature grows large, which typically moderates the finite-time singularities.

Original languageEnglish
Article number063004
Pages (from-to)1-16
Number of pages16
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume71
Issue number6
DOIs
Publication statusPublished - 2005 Mar 15
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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