Gluonic vacuum, q-theory, and the cosmological constant

F.R. Klinkhamer, Grigory Volovik

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    In previous work, q-theory was introduced to describe the gravitating macroscopic behavior of a conserved microscopic variable q. In this article, the gluon condensate of quantum chromodynamics is considered in terms of q-theory. The remnant vacuum energy density (i.e., cosmological constant) of an expanding universe is estimated as K3QCD/E2Planck, with string tension KQCD≈(102MeV)2 and gravitational scale EPlanck≈1019GeV. The only input for this estimate is general relativity, quantum chromodynamics, and the Hubble expansion of the present Universe.
    Original languageEnglish
    Article number063527
    Pages (from-to)1-8
    JournalPhysical Review D
    Issue number6
    Publication statusPublished - 2009
    MoE publication typeA1 Journal article-refereed


    • cosmological constant
    • gluonic vacuum
    • q-theory


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