Spontaneous emergence of angular momentum Josephson oscillations in coupled annular Bose-Einstein condensates

被引：31
|
作者：
Lesanovsky, I. [1 ]
von Klitzing, W. [1 ]
机构：
[1] Fdn Res & Technol Hellas, Inst Elect Struct & Laser, GR-71110 Iraklion, Greece
来源：
PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 05期
关键词：
D O I：
10.1103/PhysRevLett.98.050401
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the nonlinear dynamics of two coupled annular Bose-Einstein condensates (BECs). For certain values of the coupling strength the nonrotating state with uniform density is unstable with respect to fluctuations in the higher angular momentum modes. The Bogoliubov spectrum possesses two branches, one of which exhibits distinct regions of instability enabling one to selectively occupy certain angular momentum modes. For sufficiently long evolution times, angular momentum Josephson oscillations spontaneously appear, breaking the initial chiral symmetry of the BECs.
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页数：4
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