Visualizing Pure Quantum Turbulence in Superfluid ${}^3$He: Andreev Reflection and its Spectral Properties

Abstract

Superfluid ${}^3$He-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 ${}^3$He-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 inter-vortex separation.

5 pages, 4 figures, and Supplemental Material (2 pages, 2 figures)

References in corpus (3)

• Interaction of ballistic quasiparticles and vortex configurations in superfluid He3-B
• Ballistic propagation of thermal excitations near a vortex in superfluid He3-B
• Scattering length of Andreev reflection from quantized vortices in ${}^3$He-$B$

Cited by in corpus (1)

• Visualization of quantum turbulence in superfluid ${}^3$He-B: Combined numerical/experimental study of Andreev reflection