4.8 Article

Chiral Instabilities and the Onset of Chiral Turbulence in QED Plasmas

期刊

PHYSICAL REVIEW LETTERS
卷 124, 期 19, 页码 -

出版社

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.191604

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资金

  1. HEP Center for Computational Excellence for Computational Excellence [KA24001022]
  2. Office of Science of the U.S. Department of Energy [DE-SC0012704]
  3. European Research Council [ERC-2015-CoG-681707]
  4. U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-SC0012704]
  5. Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [404640738]
  6. Department of Science and Technology, Government of India
  7. Institute of Mathematical Sciences
  8. National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility [DE-AC02-05CH11231]
  9. SOLLVE Exascale Computing Project [17-SC-20-SC]

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We present a first principles study of chiral plasma instabilities and the onset of chiral turbulence in QED plasmas with strong gauge matter interaction (e(2)N(f) = 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 kappa = 10.2 +/- 0.5 and dynamical scaling exponents alpha = 1.14 +/- 0.50 and beta = 0.37 +/- 0.13.

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