Quantum Yang--Mills Dark Energy

Abstract

In this short review, I discuss basic qualitative characteristics of quantum non-Abelian gauge dynamics in the non-stationary background of the expanding Universe in the framework of the standard Einstein--Yang--Mills formulation. A brief outlook of existing studies of cosmological Yang--Mills fields and their properties will be given. Quantum effects have a profound impact on the gauge field-driven cosmological evolution. In particular, a dynamical formation of the spatially-homogeneous and isotropic gauge field condensate may be responsible for both early and late-time acceleration, as well as for dynamical compensation of non-perturbative quantum vacua contributions to the ground state of the Universe. The main properties of such a condensate in the effective QCD theory at the flat Friedmann--Lemaítre--Robertson--Walker (FLRW) background will be discussed within and beyond perturbation theory. Finally, a phenomenologically consistent dark energy can be induced dynamically as a remnant of the QCD vacua compensation arising from leading-order graviton-mediated corrections to the QCD ground state.

24 pages; invited review for the Special Issue "Modified Gravity Cosmology: From Inflation to Dark Energy", in Universe 2 (2016) 4

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• Phenomenological Review on Quark-Gluon Plasma: Concepts vs. Observations
• Different faces of confinement
• Mirror Symmetry of quantum Yang-Mills vacua and cosmological implications
• Whether Lyra's Manifold Itself is a Hidden Source of Dark Energy
• Mirror QCD and Cosmological Constant
• Maximally Chaotic Dynamical Systems and Fundamental Interactions
• A scalar potential from gauge condensation and its implications
• Cosmology from Strong Interactions
• Non-perturbative Origin of the Electroweak Scale: RGE in Strongly-coupled Dark Gauge Theories via Dyson-Schwinger