Interacting Dark Energy in Hořava-Lifshitz Cosmology

Details Interacting Dark Energy in Hořava-Lifshitz Cosmology Interacting Dark Energy in Hořava-Lifshitz Cosmology

2009-09-02

arxiv.org/abs/0909.0456v2

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, no figure

Scientific paper

In the usual Ho\v{r}ava-Lifshitz cosmological models, the scalar field is responsible for dark matter. Using an additional scalar field, Saridakis \cite{sari} has formulated Ho\v{r}ava-Lifshitz cosmology with an effective dark energy sector. In the paper \cite{sari} the scalar fields do not interact with each other, here we extend this work to the interacting case, where matter scalar field $\phi$ interact with dark energy scalar field $\sigma$. We will show that in contrast with \cite{sari}, where $\sigma$-filed is absent, we can obtain $w_d ^{\rm eff}<-1$, that is we result to an effective dark energy presenting phantom behaviour. This behaviour is pure effect of the interaction.

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