Collective oscillations of vortex lattices in rotating Bose-Einstein condensates

被引：47

作者：

Mizushima, T ^{[1
]}

Kawaguchi, Y

Machida, K

Ohmi, T

Isoshima, T

Salomaa, MM

机构：

[1] Okayama Univ, Dept Phys, Okayama 7008530, Japan

[2] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan

[3] Helsinki Univ Technol, Phys Mat Lab, FIN-02015 Espoo, Finland

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.92.060407

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The complete low-energy collective-excitation spectrum of vortex lattices is discussed for rotating Bose-Einstein condensates by solving the Bogoliubov-de Gennes equation, yielding, e.g., the Tkachenko mode recently observed at JILA. The totally symmetric subset of these modes includes the transverse shear, common longitudinal, and differential longitudinal modes. We also solve the time-dependent Gross-Pitaevskii equation to simulate the actual JILA experiment, obtaining the Tkachenko mode and identifying a pair of breathing modes. Combining both approaches allows one to unambiguously identify every observed mode.

引用

页数：4

共 22 条

[1] TKACHENKO WAVES [J].