Heal the world: Avoiding the cosmic doomsday in the holographic dark energy model

Abstract

The current observational data imply that the universe would end with a cosmic doomsday in the holographic dark energy model. However, unfortunately, the big-rip singularity will ruin the theoretical foundation of the holographic dark energy scenario. To rescue the holographic scenario of dark energy, we employ the braneworld cosmology and incorporate the extra-dimension effects into the holographic theory of dark energy. We find that such a mend could erase the big-rip singularity and leads to a de Sitter finale for the holographic cosmos. Therefore, in the holographic dark energy model, the extra-dimension recipe could heal the world.

Comments: 8 pages, 3 figures; v2: references and discussions added, new section added to describe the whole expansion history; v3: version for publication in Phys.Lett.B