Coincidence Problem in YM Field Dark Energy Model

Details Coincidence Problem in YM Field Dark Energy Model Coincidence Problem in YM Field Dark Energy Model

2006-04-21

arxiv.org/abs/astro-ph/0604457v4

Phys.Lett.B640:69-73,2006

Astronomy and Astrophysics

Astrophysics

10 pages including 4 figures. Only style is revised

Scientific paper

10.1016/j.physletb.2006.07.052

The coincidence problem is studied in the effective Yang-Mills condensate dark energy model. As the effective YM Lagrangian is completely determined by quantum field theory, there is no adjustable parameter in this model except the energy scale, and the cosmic evolution only depends on the initial conditions. For generic initial conditions with the YM condensate subdominant to the radiation and matter, the model always has a tracking solution, the Universe transits from matter-dominated into the dark energy dominated stage only recently $z\sim 0. 3$, and evolve to the present state with $\Omega_{y}\sim 0.73$ and $\Omega_m\sim 0.27$.

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