4.3 Article

Entropic force, running gravitational coupling and future singularities

Journal

GENERAL RELATIVITY AND GRAVITATION
Volume 46, Issue 1, Pages -

Publisher

SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10714-013-1617-7

Keywords

Cosmology; Asymptotically safe running gravitational coupling; Entropic force; Future singularities

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The effects of a running gravitational coupling and the entropic force on future singularities are considered. Although it is expected that the quantum corrections remove the future singularities or change the singularity type, treating the running gravitational coupling as a function of energy density is found to cause no change in the type of singularity but causes a delay in the time that a singularity occurs. The entropic force is found to replaces the singularity type II by (III) over bar (a = const., H = const., (H) over circle -> infinity, p -> infinity, rho -> infinity) which differs from previously known type III and to remove the w- singularity. We also consider an effective cosmological model and show that the types I and I I are replaced by the singularity type I I I.

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