2008/08/31 by M. S. Paoletti, Michael E. Fisher, K. R. Sreenivasan +1 · 3 citations
Physics and Astronomy · #cond-mat.stat-mech
paper · pdf · doi:10.1103/physrevlett.101.154501
published as Physical Review Letters 101, 154501 (2008) · 4 pages, 4 figures
arxiv created 2008/10/10 · arxiv updated 2009/12/01
By analyzing trajectories of solid hydrogen tracers, we find that the distributions of velocity in decaying quantum turbulence in superfluid 4He are strongly non-Gaussian with 1/v3 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.