Two-scalar-field model for the interaction of dark energy and dark matter
2012; American Physical Society; Volume: 86; Issue: 10 Linguagem: Inglês
10.1103/physrevd.86.103522
ISSN1550-7998
AutoresOrfeu Bertolami, P. Carrilho, Jorge Páramos,
Tópico(s)Solar and Space Plasma Dynamics
ResumoIn this paper, 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 the cosmic expansion dynamics of the Universe is reproduced for a large range of the bare mass of the dark matter field and that there exist solutions with transient accelerated expansion. A modification in the exponential behavior of the potential is studied, with important physical implications, including the possibility of more realistic transient acceleration solutions.
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