Adjustable half-skyrmion chains induced by SU(3) spin-orbit coupling in rotating Bose-Einstein condensates

doi:10.1088/1674-1056/abfcc8

中国物理B ›› 2021, Vol. 30 ›› Issue (11): 110312-110312.doi: 10.1088/1674-1056/abfcc8

Adjustable half-skyrmion chains induced by SU(3) spin-orbit coupling in rotating Bose-Einstein condensates

Li Wang(王力)¹, Ji Li(李吉)^2,†, Xiao-Lin Zhou(周晓林)³, Xiang-Rong Chen(陈向荣)¹, and Wu-Ming Liu(刘伍明)^4,5,6,‡

1 College of Physics, Sichuan University, Chengdu 610065, China;
2 College of Physics, Taiyuan Normal University, Jinzhong 030619, China;
3 School of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China;
4 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
5 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
6 Songshan Lake Materials Laboratory, Dongguan 523808, China

收稿日期:2021-03-24 修回日期:2021-04-28 接受日期:2021-04-29 出版日期:2021-10-13 发布日期:2021-11-03
通讯作者: Ji Li, Wu-Ming Liu E-mail:liji163love@163.com;wmliu@iphy.ac.cn
基金资助:
Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0301500), the National Natural Science Foundation of China (Grant Nos. 61835013 and 11971067), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Nos. XDB01020300 and XDB21030300), the Beijing Natural Science Foundation, China (Grant No. 1182009), and the Beijing Great Wall Talents Cultivation Program (Grant No. CIT&TCD20180325).

Adjustable half-skyrmion chains induced by SU(3) spin-orbit coupling in rotating Bose-Einstein condensates

Li Wang(王力)¹, Ji Li(李吉)^2,†, Xiao-Lin Zhou(周晓林)³, Xiang-Rong Chen(陈向荣)¹, and Wu-Ming Liu(刘伍明)^4,5,6,‡

1 College of Physics, Sichuan University, Chengdu 610065, China;
2 College of Physics, Taiyuan Normal University, Jinzhong 030619, China;
3 School of Physics and Electronic Engineering, Sichuan Normal University, Chengdu 610101, China;
4 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
5 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
6 Songshan Lake Materials Laboratory, Dongguan 523808, China

Received:2021-03-24 Revised:2021-04-28 Accepted:2021-04-29 Online:2021-10-13 Published:2021-11-03
Contact: Ji Li, Wu-Ming Liu E-mail:liji163love@163.com;wmliu@iphy.ac.cn
Supported by:
Project supported by the National Key Research and Development Program of China (Grant No. 2016YFA0301500), the National Natural Science Foundation of China (Grant Nos. 61835013 and 11971067), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Nos. XDB01020300 and XDB21030300), the Beijing Natural Science Foundation, China (Grant No. 1182009), and the Beijing Great Wall Talents Cultivation Program (Grant No. CIT&TCD20180325).

摘要/Abstract

摘要： The ground state properties of the rotating Bose-Einstein condensates (BECs) with SU(3) spin-orbit coupling (SOC) in a two-dimensional harmonic trap are studied. The results show that the ferromagnetic and antiferromagnetic systems present three half-skyrmion chains at an angle of 120° to each other along the coupling directions. With the enhancement of isotropic SU(3) SOC strength, the position of the three chains remains unchanged, in which the number of half-skyrmions increases gradually. With the increase of rotation frequency and atomic density-density interaction, the number of half-skyrmions on the three chains and in the regions between two chains increases gradually. The relationships of the total number of half-skyrmions on the three chains with the increase of SU(3) SOC strength, rotation frequency and atomic density-density interaction are also given. In addition, changing the anisotropic SU(3) SOC strength can regulate the number and morphology of the half-skyrmion chains.

关键词: Bose-Einstein condensates, SU(3) spin-orbit coupling, rotation, half-skyrmion chains

Abstract: The ground state properties of the rotating Bose-Einstein condensates (BECs) with SU(3) spin-orbit coupling (SOC) in a two-dimensional harmonic trap are studied. The results show that the ferromagnetic and antiferromagnetic systems present three half-skyrmion chains at an angle of 120° to each other along the coupling directions. With the enhancement of isotropic SU(3) SOC strength, the position of the three chains remains unchanged, in which the number of half-skyrmions increases gradually. With the increase of rotation frequency and atomic density-density interaction, the number of half-skyrmions on the three chains and in the regions between two chains increases gradually. The relationships of the total number of half-skyrmions on the three chains with the increase of SU(3) SOC strength, rotation frequency and atomic density-density interaction are also given. In addition, changing the anisotropic SU(3) SOC strength can regulate the number and morphology of the half-skyrmion chains.

Key words: Bose-Einstein condensates, SU(3) spin-orbit coupling, rotation, half-skyrmion chains

中图分类号: (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

03.75.Lm

03.75.Hh (Static properties of condensates; thermodynamical, statistical, and structural properties) 03.75.Nt (Other Bose-Einstein condensation phenomena) 05.30.Jp (Boson systems)

Li Wang(王力), Ji Li(李吉), Xiao-Lin Zhou(周晓林), Xiang-Rong Chen(陈向荣), and Wu-Ming Liu(刘伍明). Adjustable half-skyrmion chains induced by SU(3) spin-orbit coupling in rotating Bose-Einstein condensates[J]. 中国物理B, 2021, 30(11): 110312-110312.

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Adjustable half-skyrmion chains induced by SU(3) spin-orbit coupling in rotating Bose-Einstein condensates

Adjustable half-skyrmion chains induced by SU(3) spin-orbit coupling in rotating Bose-Einstein condensates

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