Particle vs. future event horizon in interacting holographic dark energy model

Details Particle vs. future event horizon in interacting holographic dark energy model Particle vs. future event horizon in interacting holographic dark energy model

2007-01-14

arxiv.org/abs/gr-qc/0701074v3

JCAP 0702:026,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

12 pages, 2 figures, references added, abstract changed, typos corrected. To be published in JCAP

Scientific paper

10.1088/1475-7516/2007/02/026

By choosing the future event horizon as the horizon of the flat FLRW universe, we show that although the interacting holographic dark energy model is able to explain the phantom divide line crossing, but the thermodynamics second law is not respected in this model. We show that if one takes the particle event horizon as the horizon of the universe, besides describing $\omega=-1$ crossing in a consistent way with thermodynamics second law, he is able to determine appropriately the ratio of dark matter to dark energy density at transition time. In this approach, after the first transition from quintessence to phantom, there is another transition from phantom to quintessence phase which avoids the big rip singularity.

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