Interaction of ballistic quasiparticles and vortex configurations in superfluid 3He-B

  1. Lookup NU author(s)
  2. Professor Carlo Barenghi
  3. Professor Yuri Sergeev
  4. Dr Nugzar Suramlishvili
  5. Dr Peter Van Dijk
Author(s)Barenghi CF, Sergeev YA, Suramlishvili N, van Dijk PJ
Publication type Article
JournalPhysical Review B
Year2009
Volume79
Issue2
Pages
ISSN (print)1098-0121
ISSN (electronic)1550-235X
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The vortex line density of turbulent superfluid 3He-B at very low temperature is deduced by detecting the shadow of ballistic quasiparticles, which are Andreev reflected by quantized vortices. Until now the measured total shadow has been interpreted as the sum of shadows arising from interactions of a single quasiparticle with a single vortex. By integrating numerically the quasiclassical Hamiltonian equations of motion of ballistic quasiparticles in the presence of nontrivial but relatively simple vortex systems (such as vortex-vortex and vortex-antivortex pairs and small clusters of vortices), we show that partial screening can take place, and the total shadow is not necessarily the sum of the shadows. We have also found that it is possible that, upon impinging on complex vortex configurations, quasiparticles experience multiple reflections, which can be classical, Andreev, or both.
PublisherThe American Physical Society
URLhttp://dx.doi.org/10.1103/PhysRevB.79.024508
DOI10.1103/PhysRevB.79.024508
NotesArticle number 024508 11 pages
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