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- W3103269414 abstract "In Brans-Dicke theory a non-linear self interaction of a scalar field allows a possibility of realizing the late-time cosmic acceleration, while recovering the General Relativistic behavior at early cosmological epochs. We extend this to more general modified gravitational theories in which a de Sitter solution for dark energy exists without using a field potential. We derive a condition for the stability of the de Sitter point and study the background cosmological dynamics of such theories. We also restrict the allowed region of model parameters from the demand for the avoidance of ghosts and instabilities. A peculiar evolution of the field propagation speed allows us to distinguish those theories from the LCDM model." @default.
- W3103269414 created "2020-11-23" @default.
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- W3103269414 date "2010-07-23" @default.
- W3103269414 modified "2023-10-18" @default.
- W3103269414 title "Generalized Brans-Dicke theories" @default.
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- W3103269414 doi "https://doi.org/10.1088/1475-7516/2010/07/024" @default.
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