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arXiv · 1012.5944

Strong versus weak wave-turbulence in relativistic field theory

J. Berges·D. Sexty
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Abstract

Nonthermal scaling phenomena can exhibit a characteristic dependence on the dimensionality d of space. For d=3 and 4 we simulate a relativistic scalar field theory on a lattice and compute turbulent scaling exponents. We recover Kolmogorov or weak wave-turbulence in the perturbative high-momentum regime, where it exhibits the scaling exponent kappa_w = d - 3/2. In the nonperturbative infrared regime, we find a different scaling exponent kappa_s = 4 (5) for d=3 (4), which is in agreement with the recently predicted anomalously large values kappa_s = d + 1 of strong turbulence. We show how the latter can be seen to characterize stationary transport of a conserved effective particle number.

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J. Berges, D. Sexty. 2010-12-29. Strong versus weak wave-turbulence in relativistic field theory. https://doi.org/10.1103/physrevd.83.085004

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