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• W1880222605 abstract "We present a new approach to build models of quintessence interacting with dark or baryonic matter. We use a variational approach for relativistic fluids to realize an effective description of matter fields at the Lagrangian level. The coupling is introduced directly in the action by considering a single function mixing the dynamical degrees of freedom of the theory. The resulting gravitational field equations are derived by variations with respect to the independent variables. New interesting phenomenology can be obtained at both small scales, where new screening mechanisms for scalar fields can be realized, and large scales, where one finds an original and rich class of interacting quintessence models. The background cosmology of two of these models is studied in detail using dynamical system techniques. We find a variety of interesting results: for instance, these models contain dark energy dominated late time attractors and scaling solutions, both with early time matter dominated epochs and a possible inflationary origin. In general this new approach provides the starting point for future in depth studies on new interacting quintessence models." @default.
• W1880222605 created "2016-06-24" @default.
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• W1880222605 date "2015-06-02" @default.
• W1880222605 modified "2023-09-25" @default.
• W1880222605 title "Interacting quintessence from a variational approach. I. Algebraic couplings" @default.
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• W1880222605 doi "https://doi.org/10.1103/physrevd.91.123002" @default.
• W1880222605 hasPublicationYear "2015" @default.
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