Fluctuations and Correlations of Pure Quantum Turbulence in Superfluid He3B

D. I. Bradley, S. N. Fisher, A. M. Guénault, R. P. Haley, S. O’Sullivan, G. R. Pickett, and V. Tsepelin
Phys. Rev. Lett. 101, 065302 – Published 8 August 2008

Abstract

We describe the first measurements of line-density fluctuations and spatial correlations of quantum turbulence in superfluid He3B. All of the measurements are performed in the low-temperature regime, where the normal-fluid density is negligible. The quantum turbulence is generated by a vibrating grid. The vortex-line density is found to have large length-scale correlations, indicating large-scale collective motion of vortices. Furthermore, we find that the power spectrum of fluctuations versus frequency obeys a 5/3 power law which verifies recent speculations that this behavior is a generic feature of fully developed quantum turbulence, reminiscent of the Kolmogorov spectrum for velocity fluctuations in classical turbulence.

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  • Received 3 June 2008

DOI:https://doi.org/10.1103/PhysRevLett.101.065302

©2008 American Physical Society

Authors & Affiliations

D. I. Bradley, S. N. Fisher*, A. M. Guénault, R. P. Haley, S. O’Sullivan, G. R. Pickett, and V. Tsepelin

  • Department of Physics, Lancaster University, Lancaster, LA1 4YB, United Kingdom

  • *s.fisher@lancaster.ac.uk

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Vol. 101, Iss. 6 — 8 August 2008

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