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NCUEIR > College of Science > Department of Physics > Periodical Articles > Item 987654321/14840

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/14840

Title:	Bending-wave Instability of a Vortex Ring in a Trapped Bose-Einstein Condensate
Authors:	Horng, T. L.;Gou, Shih-Chuan;Lin, T. C.
Contributors:	物理學系
Date:	2006-10
Issue Date:	2012-12-10T02:27:23Z
Publisher:	The American Physical Society
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.
Relation:	Physical Review A, 74(4): 041603(R)
Appears in Collections:	[Department of Physics] Periodical Articles

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