2005/10/31 by Shin'ichi Nojiri, Sergei D. Odintsov, O. G. Gorbunova · 1 citation
Physics and Astronomy · #hep-th #astro-ph #gr-qc
paper · pdf · doi:10.1088/0305-4470/39/21/s62
published as J.Phys.A39:6627-6634,2006 · LaTeX 8 pages, prepared for the Proceedings of QFEXT'05, minor correctons, references added
arxiv created 2005/11/22 · arxiv updated 2009/12/01
The solution of dark energy problem in the models without scalars is presented. It is shown that late-time accelerating cosmology may be generated by the ideal fluid with some implicit equation of state. The universe evolution within modified Gauss-Bonnet gravity is considered. It is demonstrated that such gravitational approach may predict the (quintessential, cosmological constant or transient phantom) acceleration of the late-time universe with natural transiton from deceleration to acceleration (or from non-phantom to phantom era in the last case).