Quantum turbulent velocity statistics and quasiclassical limit
arXiv:1110.5767 · doi:10.1103/PhysRevE.84.067301
Abstract
Two research groups have measured turbulent velocity statistics in superfluid helium using different techniques. The results were in conflict: one experiment revealed Gaussian distributions(as observed in ordinary turbulence), the other experiment determined power-laws. To solve the apparent puzzle, we numerically model quantum turbulence as a tangle of vortex filaments, and conclude that there is no contradiction between the two experiments. The transition from Gaussian to power-law arises from the different length scales which are probed using the two techniques. We find that the average distance between the quantum vortices marks the separation between quantum and quasi-classical length scales.
4 pages, 3 figures
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- Statistics of Lagrangian quantum turbulence
- Grid superfluid turbulence and intermittency at very low temperature
- Homogeneous Isotropic Superfluid Turbulence in Two Dimensions: Inverse and Forward Cascades in the Hall-Vinen-Bekharevich-Khalatnikov model
- Isotropic vortex tangles in trapped atomic Bose-Einstein condensates via laser stirring
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- Inviscid diffusion of vorticity in low temperature superfluid helium
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- Topological stirring of two-dimensional atomic Bose-Einstein condensates
- Conformal-invariance of 2D quantum turbulence in an exciton-polariton fluid of light
- Simulating Quantum Turbulence with Matrix Product States
- Regimes of turbulence without an energy cascade
- A quantum storm in a teacup