title: Fluctuations and Correlations of Pure Quantum Turbulence in Superfluid 3He-B.
abstract: We describe the first measurements of line-density fluctuations and spatial correlations of quantum turbulence in superfluid 3He-B. 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.
authors.affiliation: Department of Physics, Lancaster University, Lancaster, LA1 4YB, United Kingdom.
authors.forename: D I
authors.initials: DI
authors.lastname: Bradley
authors.forename: S N
authors.initials: SN
authors.lastname: Fisher
authors.forename: A M
authors.initials: AM
authors.lastname: Guénault
authors.forename: R P
authors.initials: RP
authors.lastname: Haley
authors.forename: S
authors.initials: S
authors.lastname: O'Sullivan
authors.forename: G R
authors.initials: GR
authors.lastname: Pickett
authors.forename: V
authors.initials: V
authors.lastname: Tsepelin