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Visualizing Pure Quantum Turbulence in Superfluid ³He: Andreev Reflection and its Spectral Properties

Lookup NU author(s): Dr Andrew BaggaleyORCiD, Professor Carlo Barenghi, Emeritus Professor Yuri Sergeev, Dr Nugzar Suramlishvili

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Abstract

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

Publication metadata

Author(s): Baggaley AW, Tsepelin V, Barenghi CF, Fisher SN, Pickett GR, Sergeev YA, Suramlishvili N

Publication type: Article

Publication status: Published

Journal: Physical Review Letters

Year: 2015

Volume: 115

Issue: 1

Print publication date: 02/07/2015

Online publication date: 02/07/2015

Acceptance date: 25/05/2015

Date deposited: 16/07/2015

ISSN (print): 0031-9007

ISSN (electronic): 1079-7114

Publisher: American Physical Society

URL: http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.015302

DOI: 10.1103/PhysRevLett.115.015302

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