Visualizing Pure Quantum Turbulence in Superfluid He3: Andreev Reflection and its Spectral Properties

A. W. Baggaley; V. Tsepelin; C. F. Barenghi; S. N. Fisher; G. R. Pickett; Y. A. Sergeev; N. Suramlishvili

doi:10.1103/PhysRevLett.115.015302

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Visualizing Pure Quantum Turbulence in Superfluid He3: Andreev Reflection and its Spectral Properties

A. W. Baggaley, V. Tsepelin, C. F. Barenghi, S. N. Fisher, G. R. Pickett, Y. A. Sergeev, N. Suramlishvili

DOI 10.1103/PhysRevLett.115.015302 · Physical Review Letters

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Abstract

Superfluid He3−B in the zero-temperature limit offers a unique means of studying quantum turbulence by the Andreev reflection of quasiparticle excitations by the vortex flow fields. We validate the experimental visualization of turbulence in He3−B by showing the relation between the vortex-line density and the Andreev reflectance of the vortex tangle in the first simulations of the Andreev reflectance by a realistic 3D vortex tangle, and comparing the results with the first experimental measurements able to probe quantum turbulence on length scales smaller than the intervortex separation.