Orfeu Bertolami, Pedro Carrilho, Jorge Páramos
In this letter, we study the effects of an interaction between dark matter and dark energy through a two scalar field model with a potential $V(\phi,\chi)=e^{-\lambda\phi}P(\phi,\chi)$, where $P(\phi,\chi)$ is a polynomial. We show that features of the present Universe are reproduced for a large range of the bare mass of the dark matter field. Simple modifications of the potential are studied, revealing important implications of the interaction, including the possibility of transient acceleration solutions.
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http://arxiv.org/abs/1206.2589
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