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 μ_{5}, leads to an electric current along the magnetic field. This causes a chiral dynamo instability for a uniform μ_{5}, but our simulations reveal a dynamo even for fluctuating μ_{5} with zero mean. It produces magnetically dominated turbulence and generates mean magnetic fields via the magnetic α effect. Eventually, a universal scaleinvariant k^{1} spectrum of μ_{5} and a k^{3} magnetic spectrum are formed independently of the initial condition.
 Publication:

Physical Review Letters
 Pub Date:
 February 2022
 DOI:
 10.1103/PhysRevLett.128.065002
 arXiv:
 arXiv:2107.12945
 Bibcode:
 2022PhRvL.128f5002S
 Keywords:

 Physics  Plasma Physics;
 Astrophysics  Cosmology and Nongalactic Astrophysics;
 Astrophysics  High Energy Astrophysical Phenomena;
 Physics  Fluid Dynamics
 EPrint:
 6 pages, 4 figures, published in Phys. Rev. Lett