Production of a chiral magnetic anomaly with emerging turbulence and meanfield dynamo action
Abstract
In relativistic magnetized plasmas, asymmetry in the number densities of left and righthanded fermions, i.e., a nonzero chiral chemical potential mu_5, leads to an electric current along the magnetic field. This causes a chiral dynamo instability for a uniform mu_5, but our simulations reveal dynamos even for fluctuating mu_5 with zero mean. This generates smallscale magnetic helicity and turbulence. A largescale mu_5 emerges due to chirality conservation. These effects amplify a mean magnetic field via the magnetic alpha effect and produce a universal scaleinvariant mu_5 spectrum.
 Publication:

arXiv eprints
 Pub Date:
 July 2021
 arXiv:
 arXiv:2107.12945
 Bibcode:
 2021arXiv210712945S
 Keywords:

 Physics  Plasma Physics;
 Astrophysics  Cosmology and Nongalactic Astrophysics;
 Astrophysics  High Energy Astrophysical Phenomena;
 Physics  Fluid Dynamics
 EPrint:
 6 pages, 4 figures