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題名: Bending-wave Instability of a Vortex Ring in a Trapped Bose-Einstein Condensate
作者: Horng, T. L.;Gou, Shih-Chuan;Lin, T. C.
貢獻者: 物理學系
日期: 2006-10
上傳時間: 2012-12-10T02:27:23Z
出版者: The American Physical Society
摘要: 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.
關聯: Physical Review A, 74(4): 041603(R)
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