2016/10/04 by É. V. Gorbar, E. V. Gorbar, I. Rudenok +3 · 30 citations
Chemistry · Physics and Astronomy · #Anomaly (physics) #Asymmetry #Black Holes and Theoretical Physics #Cascade #Chemistry #Chiral anomaly #Computational physics #Condensed matter physics #Cosmology and Gravitation Theories #Diffusion #Helicity #High-Energy Particle Collisions Research #Homogeneous #Inverse #Magnetic field #Magnetic helicity #Magnetohydrodynamics #Physics #Plasma #Quantum electrodynamics #Quantum mechanics #Statistical physics #astro-ph.CO #hep-ph
paper · pdf · doi:10.1103/physrevd.94.103528
published in Physical review. D/Physical review. D. 94(10) (American Physical Society) · 9 pages, 5 multipanel figures
arxiv created 2016/10/04 · openalex created_date 2016/10/14 · openalex publication_date 2016/11/28 · arxiv updated 2016/12/07 · openalex updated_date 2026/08/06
By making use of a simple model that captures the key features of the anomalous Maxwell equations, we study the role of inhomogeneities on the evolution of magnetic fields in a chiral plasma. We find that inhomogeneities of the chiral asymmetry by themselves do not prevent the anomaly-driven inverse cascade and, as in the homogeneous case, the magnetic helicity is transferred from shorter to longer wavelength helical modes of the magnetic field. However, we also find that the evolution appears to be sensitive to the effects of diffusion. In the case when diffusion is negligible, the inverse cascade slows down considerably compared to the homogeneous scenario. In the case of the primordial plasma, though, we find that the diffusion is substantial and efficiently suppresses chiral asymmetry inhomogeneities. As a result, the inverse cascade proceeds practically in the same way as in the chirally homogeneous model.