Production of a Chiral Magnetic Anomaly with Emerging Turbulence and Mean-Field Dynamo Action
Abstract
In relativistic magnetized plasmas, asymmetry in the number densities of left- and right-handed fermions, i.e., a nonzero chiral chemical potential μ5, leads to an electric current along the magnetic field. This causes a chiral dynamo instability for a uniform μ5, but our simulations reveal a dynamo even for fluctuating μ5 with zero mean. It produces magnetically dominated turbulence and generates mean magnetic fields via the magnetic α effect. Eventually, a universal scale-invariant k-1 spectrum of μ5 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
- E-Print:
- 6 pages, 4 figures, published in Phys. Rev. Lett