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

页码：61601 / 61601

页数：4

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