Holographic dark energy in a cyclic universe

Details Holographic dark energy in a cyclic universe Holographic dark energy in a cyclic universe

2007-08-23

arxiv.org/abs/0708.3121v2

Eur.Phys.J.C52:693-699,2007

Physics

High Energy Physics

High Energy Physics - Theory

13 pages; typos corrected, version to appear in Eur. Phys. J. C

Scientific paper

10.1140/epjc/s10052-007-0408-2

In this paper we study the cosmological evolution of the holographic dark energy in a cyclic universe, generalizing the model of holographic dark energy proposed by Li. The holographic dark energy with $c<1$ can realize a quintom behavior; namely, it evolves from a quintessence-like component to a phantom-like one. The holographic phantom energy density grows rapidly and dominates the late-time expanding phase, helping realize a cyclic universe scenario in which the high energy regime is modified by the effects of quantum gravity, causing a turnaround (and a bounce) of the universe. The dynamical evolution of holographic dark energy in the regimes of low energy and high energy is governed by two differential equations, respectively. It is of importance to link the two regimes for this scenario. We propose a link condition giving rise to a complete picture of holographic evolution of a cyclic universe.

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