Dynamics of interacting dark energy

Computer Science – Numerical Analysis

Scientific paper

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Dark Matter, Cosmology, Numerical Analysis, Dark Energy, Origin And Formation Of The Universe, Ordinary And Partial Differential Equations, Boundary Value Problems

Scientific paper

It is possible that there is an exchange of energy within the dark sector of Cosmology. We consider two broad classes of interacting models where the energy exchange is a linear combination of the dark sector densities. We give general conditions on the parameters in both classes to avoid unphysical behavior, such as negative energy densities and the appearance of instabilities in their linear perturbations.

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