Journal
PHYSICAL REVIEW D
Volume 79, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.79.043511
Keywords
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Funding
- National Science Foundation of China [10525314, 10533010, 10575004]
- Chinese Academy of Sciences [KJCX3-SYW-N2]
- Ministry of Science and Technology [2007CB815401]
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Motivated by the holographic principle, it has been suggested that the dark energy density may be inversely proportional to the area of the event horizon of the Universe. However, such a model would have a causality problem. In this paper, we propose to replace the future event horizon area with the inverse of the Ricci scalar curvature. We show that this model does not only avoid the causality problem and is phenomenologically viable, but also naturally solves the coincidence problem of dark energy. Our analysis of the evolution of density perturbations show that the matter power spectra and cosmic microwave background temperature anisotropy is only slightly affected by such modification.
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