Non-flat universe and interacting dark energy model
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For non-flat universe of $k\not=0$, we investigate a model of the interacting holographic dark energy with cold dark matter (CDM). There exists a mixture of two components arisen from decaying of the holographic dark energy into CDM. In this case we use the effective equations of state ($ω^{\rm eff}_{\rm Λ}, ω^{\rm eff}_{\rm m}$) instead of the native equations of state ($ω_{\rm Λ},ω_{\rm m})$.
Consequently, we show that interacting holographic energy models in non-flat universe cannot accommodate a transition from the dark energy to the phantom regime.
12 pages, 4 figures, version to appear in PLB
12 pages, 4 figures, version to appear in PLB