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- W2141564053 abstract "We propose the Gauss-Bonnet dark energy model inspired by string/M-theory where standard gravity with scalar contains additional scalar-dependent coupling with Gauss-Bonnet invariant. It is demonstrated that effective phantom (or quintessence) phase of late universe may occur in the presence of such term when the scalar is phantom or for non-zero potential (for canonical scalar). However, with the increase of the curvature the GB term may become dominant so that phantom phase is transient and $w=-1$ barrier may be passed. Hence, the current acceleration of the universe may be caused by mixture of scalar phantom and (or) potential/stringy effects. It is remarkable that scalar-Gauss-Bonnet coupling acts against the Big Rip occurence in phantom cosmology." @default.
- W2141564053 created "2016-06-24" @default.
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- W2141564053 date "2005-06-07" @default.
- W2141564053 modified "2023-10-18" @default.
- W2141564053 title "Gauss-Bonnet dark energy" @default.
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- W2141564053 doi "https://doi.org/10.1103/physrevd.71.123509" @default.
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