2005/05/31 by Diego Pavon, Winfried Zimdahl · 2 citations
Physics and Astronomy · #gr-qc #astro-ph #hep-th
paper · pdf · doi:10.1016/j.physletb.2005.08.134
published as Phys.Lett.B628:206-210,2005 · 9 pages, no figures, references updated, typos eliminated. To be published in Physics Letters B
arxiv created 2005/09/26 · arxiv updated 2009/12/01
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.