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

Abstract

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.

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

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• Interacting HDE and NADE in Brans-Dicke Chameleon Cosmology
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• Generalized second law in modified theory of gravity
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• The dynamical behavior of the Extended Holographic Dark Energy with Hubble Horizon
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• Non-existence of Extended Holographic Dark Energy with Hubble Horizon
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• Study of Thermodynamics in Generalized Holographic and Ricci Dark Energy Models
• Holographic Dark Energy with Curvature
• Geometric and thermodynamic properties in Gauss-Bonnet gravity