2-loop Quantum Yang-Mills Condensate as Dark Energy

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dc.creatorXia, T. Y.
dc.creatorZhang, Y.
dc.date2007-09-29
dc.date.accessioned2026-07-07T11:37:39Z
dc.date.available2026-07-07T11:37:39Z
dc.descriptionIn seeking a model solving the coincidence problem, the effective Yang-Mills condensate (YMC) is an alternative candidate for dark energy. A study is made for the model up to the 2-loop order of quantum corrections. It is found that, like in the 1-loop model, for generic initial conditions during the radiation era, there is always a desired tracking solution, yielding the current status $Ω_Λ\simeq 0.73$ and $Ω_m \simeq 0.27$. As the time $t\to \infty$ the dynamics is a stable attractor. Thus the model naturally solves the coincidence problem of dark energy. Moreover, if YMC decays into matter, its equation of state (EoS) crosses -1 and takes $w\sim -1.1$, as indicated by the recent observations.
dc.description9 pages, 4 figures. Phys. Lett. B accepted
dc.identifierhttps://arxiv.org/abs/0710.0077
dc.identifierhttp://arxiv.org/abs/0710.0077
dc.identifierPhys.Lett.B656:19-24,2007
dc.identifierdoi:10.1016/j.physletb.2007.09.046
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/199277
dc.subjectAstrophysics
dc.title2-loop Quantum Yang-Mills Condensate as Dark Energy
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