Entropic Corrections to Friedmann Equations

Details Entropic Corrections to Friedmann Equations Entropic Corrections to Friedmann Equations

2010-03-30

arxiv.org/abs/1004.0627v4

Phys.Rev.D81:104011,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, the version appears in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.81.104011

Recently, Verlinde discussed that gravity can be understood as an entropic force caused by changes in the information associated with the positions of material bodies. In the Verlinde's argument, the area law of the black hole entropy plays a crucial role. However, the entropy-area relation can be modified from the inclusion of quantum effects, motivated from the loop quantum gravity. In this note, by employing this modified entropy-area relation, we derive corrections to Newton's law of gravitation as well as modified Friedman equations by adopting the viewpoint that gravity can be emerged as an entropic force. Our study further supports the universality of the log correction and provides a strong consistency check on Verlinde's model.

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