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http://ir.ncue.edu.tw/ir/handle/987654321/14840
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| 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
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| Issue Date: | 2012-12-10T02:27:23Z
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| 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: | [物理學系] 期刊論文
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