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Lookup NU author(s): Professor Yuri Sergeev,
Professor Carlo Barenghi,
Dr Nugzar Suramlishvili
This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Physical Society, 2015.
For re-use rights please refer to the publisher's terms and conditions.
Andreev reflection of thermal quasiparticles from quantized vortices is an important technique to visualize quantum turbulence in low temperature 3He-B. We revisit a problem of Andreev reflection from the isolated, rectilinear vortex line. For quasiparticle excitations whose impact parameters, defined as distances of the closest approach to the vortex core, do not exceed some arbitrary value b, we calculate exactly the reflected fraction of the total flux of excitations incident upon the vortex in the direction orthogonal to the vortex line.We then define and calculate exactly, as a function of b, the scattering length, that is the scattering cross section per unit length of the vortex line. We also define and calculate the scattering lengths for the flux of energy carried by thermal excitations, and for the net energy flux resulting from a (small) temperature gradient, and analyze the dependence of these scattering lengths on temperature.
Author(s): Sergeev YA, Barenghi CF, Fisher SN, Tsepelin V, Suramlishvili N
Publication type: Article
Publication status: Published
Journal: Physical Review B
Print publication date: 01/04/2015
Online publication date: 16/04/2015
Acceptance date: 02/04/2015
Date deposited: 01/05/2015
ISSN (print): 1098-0121
ISSN (electronic): 1550-235X
Publisher: American Physical Society
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