Non-Abelian condensates as alternative for dark energy

Abstract

We review basic features of cosmological models with large-scale classical non-Abelian Yang-Mills (YM) condensates. There exists a unique SU(2) YM configuration (generalizable to larger gauge groups) compatible with homogeneity and isotropy of the three-space which is parameterized by a single scalar field. In the past various aspects of Einstein-Yang-Mills (EYM) cosmology were discussed in the context of the Early Universe. Due to conformal invariance, solvable EYM FRW models exist both on the classical and quantum levels. To develop the YM model for dark energy one has to find mechanisms of the conformal symmetry breaking. We discuss the Born-Infeld generalization and some phenomenological models motivated by quantum corrections exploring possibility of transient DE and phantom regimes.

Extended version of the talk given at 43-rd Rencontres de Moriond, La Thuile, March 15-22, 2008. 16 pages, moriond.tex

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• Gauge-flation Vs Chromo-Natural Inflation
• Slow-roll trajectories in Chromo-Natural and Gauge-flation Models, an exhaustive analysis
• Dynamics of inflation with mutually orthogonal vector fields in a closed universe
• Quantum Yang--Mills Dark Energy
• Modified Friedmann Equations from Maxwell-Weyl Gauge Theory
• Cosmology with non-minimally coupled Yang--Mills field