Velocity Statistics Distinguish Quantum Turbulence from Classical Turbulence

Details Velocity Statistics Distinguish Quantum Turbulence from Classical Turbulence Velocity Statistics Distinguish Quantum Turbulence from Classical Turbulence

2008-08-07

arxiv.org/abs/0808.1103v2

Physical Review Letters 101, 154501 (2008)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.101.154501

By analyzing trajectories of solid hydrogen tracers, we find that the distributions of velocity in decaying quantum turbulence in superfluid $^4$He are strongly non-Gaussian with $1/v^3$ power-law tails. These features differ from the near-Gaussian statistics of homogenous and isotropic turbulence of classical fluids. We examine the dynamics of many events of reconnection between quantized vortices and show by simple scaling arguments that they produce the observed power-law tails.

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