Stable knots in the trapped Bose-Einstein condensates

被引：7
|
作者：
Liu, Yong-Kai [1 ]
Feng, Shiping [1 ]
Yang, Shi-Jie [1 ,2 ]
机构：
[1] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
[2] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China
来源：
EPL | 2014年 / 106卷 / 05期
基金：
美国国家科学基金会;
关键词：
DYNAMICS;
D O I：
10.1209/0295-5075/106/50005
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The knot of the spin-texture is studied within the two-component Bose-Einstein condensates which are described by the nonlinear Gross-Pitaevskii equations. We start from the noninteracting equations including an axisymmetric harmonic trap to obtain an exact solution, which exhibits a nontrivial topological structure. The spin-texture is a knot with an integral Hopf invariant. The stability of the knot is verified by numerically evolving the nonlinear Gross-Pitaevskii equations along imaginary time. Copyright (C) EPLA, 2014
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页数：11
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