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Session: Superfluids 1
Session starts: Wednesday 26 August, 10:30
Presentation starts: 10:30
Room: Room E

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Yuri A. Sergeev (Joint Quantum Centre Durham-Newcastle and School of Mechanical and Systems Engineering, Newcastle University, Newcastle upon Tyne, United Kingdom)
Carlo F. Barenghi (Joint Quantum Centre Durham-Newcastle and School of Mathematics and Statistics, Newcastle University, Newcastle upon Tyne, United Kingdom)
Viktor Tsepelin (Department of Physics, Lancaster University, Lancaster, United Kingdom)
Andrew W. Baggaley (Joint Quantum Centre Durham-Newcastle and School of Mathematics and Statistics, Newcastle University, Newcastle upon Tyne, United Kingdom)
Shaun N. Fisher (Department of Physics, Lancaster University, Lancaster, United Kingdom)
George R. Pickett (Department of Physics, Lancaster University, Lancaster, United Kingdom)

Abstract:
One of the experimental techniques developed to measure quantum turbulence at low temperatures in 3He-B utilizes the Andreev reflection of thermal quasiparticle excitations from quantized vortices and vortex structures. We present the results of theoretical, numerical, and experimental study of Andreev scattering from quantum turbulence in 3He-B. We analyze the spectral properties of the Andreev reflection and compare these with the spectral properties of superfluid turbulence, and discuss the physical mechanisms responsible for the scaling of spectral densities. Finally, we discuss the relation between our findings and related observables in ordinary turbulence.