Dynamical behavior of the Universe: an entropic force scenario

Abstract

Entropic force originates in the assumption that there is a horizon for the universe. This horizon gives rise to additional terms in the equations of motion. Using dynamical system calculations, our results show that in the presence of dark energy for certain conditions, the last attractor of this theory will be dark energy epoch, but in the absence of dark energy, entropic force energy portion will have the lead role in the late time universe and is responsible for accelerated expansion of that. Interestingly, assuming both entropic force terms and dark energy to have their share of energy density of the universe, we have found that, in certain conditions entropic force dominated epoch is a stable fixed point while the dark energy epoch is a saddle point.

8 pages, 5 figures

References in corpus (6)

• f(R,T) gravity
• Dark Energy and the Accelerating Universe
• Matter density perturbations and effective gravitational constant in modified gravity models of dark energy
• Entropic Accelerating Universe
• Cosmological Constraints on the Modified Entropic Force Model
• CMB acoustic scale in the entropic-like accelerating universe