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Abstract: In this paper we study the cosmological evolution of the holographic darkenergy in a cyclic universe, generalizing the model of holographic dark energyproposed by Li. The holographic dark energy with $c<1$ can realize a quintombehavior; namely, it evolves from a quintessence-like component to aphantom-like one. The holographic phantom energy density grows rapidly anddominates the late-time expanding phase, helping realize a cyclic universescenario in which the high energy regime is modified by the effects of quantumgravity, causing a turnaround and a bounce of the universe. The dynamicalevolution of holographic dark energy in the regimes of low energy and highenergy is governed by two differential equations, respectively. It is ofimportance to link the two regimes for this scenario. We propose a linkcondition giving rise to a complete picture of holographic evolution of acyclic universe.



Autor: Jingfei Zhang, Xin Zhang, Hongya Liu

Fuente: https://arxiv.org/







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