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Production of a chiral magnetic anomaly with emerging turbulence and mean-field dynamo action

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arxiv 2107.12945 v3 pith:WOFEXGVD submitted 2021-07-27 physics.plasm-ph astro-ph.COastro-ph.HEphysics.flu-dyn

classification physics.plasm-phastro-ph.COastro-ph.HEphysics.flu-dyn
keywords magneticchiraldynamomeanspectrumturbulenceactionalong
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In relativistic magnetized plasmas, asymmetry in the number densities of left- and right-handed fermions, i.e., a non-zero 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 a dynamo even for fluctuating mu_5 with zero mean. It produces magnetically-dominated turbulence and generates mean magnetic fields via the magnetic alpha effect. Eventually, a universal scale-invariant k^(-1) spectrum of mu_5 and a k^(-3) magnetic spectrum are formed independently of the initial condition.

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Cited by 1 Pith paper

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  1. Primordial magnetic field from chiral plasma instability with sourcing

    hep-ph 2025-12 conditional novelty 6.0 of 10

    Adding a chirality source allows the chiral plasma instability to generate helical magnetic fields below the 80 TeV erasure temperature, with a helicity estimate confirmed by 1024^3 simulations.

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