Quantum Yang-Mills dark energy

Summary, in English

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.

• Author: Roman Pasechnik
• Department/s: Theoretical Particle Physics - Has been reorganised
• Publishing year: 2016-01-01
• Language: English
• Publication/Series: Universe
• Volume: 2
• Issue: 1
• Links: http://dx.doi.org/10.3390/universe2010004
• Document type: Journal article review
• Publisher: MDPI AG
• Topic: Subatomic Physics
• Keywords: Classical Yang-Mills fields; Dark energy; Effective Yang-Mills action; Einstein-Yang-Mills theory; Gauge-flation; Gluon condensate
• Status: Published
• ISBN/ISSN/Other: ISSN: 2218-1997