Chiral Instabilities and the Onset of Chiral Turbulence in QED Plasmas
Mace, M., Mueller, N., Schlichting, S., & Sharma, S. (2020). Chiral Instabilities and the Onset of Chiral Turbulence in QED Plasmas. Physical Review Letters, 124(19), Article 191604. https://doi.org/10.1103/PhysRevLett.124.191604
Julkaistu sarjassa
Physical Review LettersPäivämäärä
2020Tekijänoikeudet
© Authors, 2020
We present a first principles study of chiral plasma instabilities and the onset of chiral turbulence in QED plasmas with strong gauge matter interaction (e2Nf=64), far from equilibrium. By performing classical-statistical lattice simulations of the microscopic theory, we show that the generation of strong helical magnetic fields from a helicity imbalance in the fermion sector proceeds via three distinct phases. During the initial linear instability regime the helicity imbalance of the fermion sector causes an exponential growth (damping) of magnetic field modes with right- (left-) handed polarization, for which we extract the characteristic growth (damping) rates. Secondary growth of unstable modes accelerates the helicity transfer from fermions to gauge fields and ultimately leads to the emergence of a self-similar scaling regime characteristic of a decaying turbulence, where magnetic helicity is efficiently transferred to macroscopic length scales. Within this turbulent regime, the evolution of magnetic helicity spectrum can be described by an infrared power spectrum with spectral exponent κ=10.2±0.5 and dynamical scaling exponents α=1.14±0.50 and β=0.37±0.13.
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American Physical SocietyISSN Hae Julkaisufoorumista
0031-9007Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/35900978
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Lisätietoja rahoituksesta
M. M. was supported by the EuropeanResearch Council Grant No. ERC-2015-CoG-681707.Lisenssi
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