Critcal velocity of superfluid flow past large obstacles in Bose-Einstein condensates

被引：46
|
作者：
Stiessberger, JS [1 ]
Zwerger, W [1 ]
机构：
[1] Univ Munich, Sekt Phys, D-80333 Munich, Germany
来源：
PHYSICAL REVIEW A | 2000年 / 62卷 / 06期
关键词：
D O I：
10.1103/PhysRevA.62.061601
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
By considering the stability of potential how of a superfluid around large obstacles of size R, we derive an analytical result for the critical velocity that is of order v(c)similar to(h) over bar /mR, scaling inversely with obstacle size, in contrast to what is obtained from a Landau criterion. Our results are compared with nutnerical solutions of the aross-Pitaevskii equation and with recent measurements of the critical velocity in Bose-Einstein condensates of dilute atomic gases.
引用
收藏
页码：61601 / 61601
页数：4
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