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Production of a Chiral Magnetic Anomaly with Emerging Turbulence and Mean-Field Dynamo Action
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Ben-Gurion University of the Negev, Israel.ORCID iD: 0000-0001-7308-4768
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Stockholm University, Faculty of Science, Department of Astronomy. Ilia State University, Georgia; Carnegie Mellon University, USA.ORCID iD: 0000-0002-7304-021X
Number of Authors: 32022 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 128, no 6, article id 065002Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2022. Vol. 128, no 6, article id 065002
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Physical Sciences
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URN: urn:nbn:se:su:diva-202755DOI: 10.1103/PhysRevLett.128.065002ISI: 000754677600006PubMedID: 35213203OAI: oai:DiVA.org:su-202755DiVA, id: diva2:1643827
Available from: 2022-03-11 Created: 2022-03-11 Last updated: 2022-03-11Bibliographically approved

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Rogachevskii, IgorBrandenburg, Axel

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