Gauss-Bonnet dark energy

By Shin'ichi Nojiri, Sergei D. Odintsov, Misao Sasaki. 2005

597 citations recorded by the source corpus.

We propose the Gauss-Bonnet dark energy model inspired by string/M-theory where standard gravity with scalar contains additional scalar-dependent coupling with a Gauss-Bonnet invariant. It is demonstrated that the effective phantom (or quintessence) phase of the late universe may occur in the presence of such a term when the scalar is phantom or for nonzero potential (for canonical scalar). However, with the increase of the curvature, the Gauss-Bonnet term may become dominant so that the phantom phase is transient and the $w=\ensuremath{-}1$ barrier may be passed. Hence, the current acceleration of the universe may be caused by a mixture of scalar phantom and/or potential or stringy effects. It is remarkable that scalar-Gauss-Bonnet coupling acts against the big rip occurrence also in phantom cosmology.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/dec9dc71f35668047bf45316537d5fd54bc629f0

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In Nuclear and High Energy Physics

Citations in the corpus

Bouncing cosmology in f(Q) symmetric teleparallel gravity (2020, background): “[12] S.”
Effective field theory of dark energy: A review (2019, unknown): “Quartic and Quintic galileon [96, 97], Fab four [313], de Sitter Horndeski [314], Gμνφ φ [315], f(φ)-Gauss-Bonnet [316].”