Bending-wave instability of a vortex ring in a trapped Bose-Einstein condensate

T. L. Horng, S. C. Gou, T. C. Lin

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

Using a velocity formula derived by matched asymptotic expansion, we study the dynamics of a vortex ring in an axisymmetric Bose-Einstein condensate in the Thomas-Fermi limit. The trajectory for an axisymmetrically placed and oriented vortex ring shows that it generally precesses in a condensate. The linear instability due to bending waves is investigated both numerically and analytically. General stability boundaries for various perturbed wave numbers are computed. Our analysis suggests that a slightly oblate trap is needed to prevent the vortex ring from becoming unstable.

Original languageEnglish
Article number041603
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume74
Issue number4
DOIs
Publication statusPublished - 2006 Oct 25

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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