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- W2004249503 abstract "Spatially homogeneous models with a scalar field non-minimally coupled to the spacetime curvature or to the ordinary matter content are analysed with respect to late-time asymptotic behaviour, in particular to accelerated expansion and isotropization. It is found that a direct coupling to the curvature leads to asymptotic de Sitter expansion in arbitrary exponential potentials, thus yielding a positive cosmological constant although none is apparent in the potential. This holds true regardless of the steepness of the potential or the smallness of the coupling constant. For matter-coupled scalar fields, the asymptotics are obtained for a large class of positive potentials, generalizing the well-known cosmic no-hair theorems for minimal coupling. In this case it is observed that the direct coupling to matter does not impact the late-time dynamics essentially." @default.
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- W2004249503 date "2006-09-20" @default.
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- W2004249503 title "Coupled quintessence and curvature-assisted acceleration" @default.
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