Cosmological Constraints on the Modified Entropic Force Model
arXiv:1005.1445 · doi:10.1016/j.physletb.2010.07.036
Abstract
Very recently, Verlinde considered a theory in which space is emergent through a holographic scenario, and proposed that gravity can be explained as an entropic force caused by changes in the information associated with the positions of material bodies. Then, motivated by the Debye model in thermodynamics which is very successful in very low temperatures, Gao modified the entropic force scenario. The modified entropic force (MEF) model is in fact a modified gravity model, and the universe can be accelerated without dark energy. In the present work, we consider the cosmological constraints on the MEF model, and successfully constrain the model parameters to a narrow range. We also discuss many other issues of the MEF model. In particular, we clearly reveal the implicit root to accelerate the universe in the MEF model.
16 pages, 7 figures, revtex4; v2: discussions added, Phys. Lett. B in press; v3: published version
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Cited by in corpus (8)
- Entropic Corrections to Einstein Equations
- Constraints on the generalized Chaplygin gas model including gamma-ray bursts via a Markov Chain Monte Carlo approach
- Constraining Entropic Cosmology
- The Friedmann equation in modified entropy-area relation from entropy force
- Dilatonic Entropic Force
- Noncommutative Geometry Inspired Entropic Inflation
- First law of thermodynamics on holographic screens in entropic force frame
- Dark Energy Cosmology with the Alternative Cosmic Microwave Background Data