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Holographic dark energy and cosmic coincidence

Diego Pavon·Winfried Zimdahl
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Abstract

In this Letter we demonstrate that any interaction of pressureless dark matter with holographic dark energy, whose infrared cutoff is set by the Hubble scale, implies a constant ratio of the energy densities of both components thus solving the coincidence problem. The equation of state parameter is obtained as a function of the interaction strength. For a variable degree of saturation of the holographic bound the energy density ratio becomes time dependent which is compatible with a transition from decelerated to accelerated expansion.

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Diego Pavon, Winfried Zimdahl. 2005-09-26. Holographic dark energy and cosmic coincidence. https://doi.org/10.1016/j.physletb.2005.08.134

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