Three-dimensional solitons in two-component Bose–Einstein condensates  

作　　者：刘永恺 杨师杰 

机构地区：[1]Department of Physics, Beijing Normal University [2]State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics B》2014年第11期198-201,共4页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.11374036);the National Basic Research Program of China(Grant No.2012CB821403)

摘　　要：We investigate a kind of solitons in the two-component Bose-Einstein condensates with axisymmetric configurations in the R2 × S1 space. The corresponding topological structure is referred to as Hopfion. The spin texture differs from the conventional three-dimensional （3D） skyrmion and knot, which is characterized by two homotopy invariants. The stability of the Hopfion is verified numerically by evolving the Gross-Pitaevskii equations in imaginary time.We investigate a kind of solitons in the two-component Bose-Einstein condensates with axisymmetric configurations in the R2 × S1 space. The corresponding topological structure is referred to as Hopfion. The spin texture differs from the conventional three-dimensional （3D） skyrmion and knot, which is characterized by two homotopy invariants. The stability of the Hopfion is verified numerically by evolving the Gross-Pitaevskii equations in imaginary time.

关 键 词：two-component Bose-Einstein condensates three-dimensional （3D） soliton coupled Gross-Pitaevskii equations Hopfion 

分 类 号：O413[理学—理论物理]