Two-scalar-field model for the interaction of dark energy and dark matter

Abstract

In this paper, we study the effects of an interaction between dark matter and dark energy through a two scalar field model with a potential $V(\varphi ,\chi )=e^{-\lambda \varphi }P(\varphi ,\chi )$, where $P(\varphi ,\chi )$ 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.

Version to match the one published in Physical Review D, 8 pages, 11 figures

References in corpus (3)

• Dynamics of dark energy
• Dark Energy-Dark Matter Interaction and putative violation of the Equivalence Principle from the Abell Cluster A586
• A Field Theory Model for Dark Matter and Dark Energy in Interaction