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Manipulating vortices in F=2 Bose-Einstein condensates through magnetic field and spin-orbit coupling |
| Hao Zhu(朱浩)1, Shou-Gen Yin(印寿根)1,†, and Wu-Ming Liu(刘伍明)2,3,4,‡ |
1 Key Laboratory of Display Materials and Photoelectric Devices(Ministry of Education), Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;
2 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3 School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China;
4 Songshan Lake Materials Laboratory, Dongguan 523808, China |
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Abstract We investigate the vortex structures excited by Ioffe-Pritchard magnetic field and Dresselhaus-type spin-orbit coupling in F=2 ferromagnetic Bose-Einstein condensates. In the weakly interatomic interacting regime, an external magnetic field can generate a polar-core vortex in which the canonical particle current is zero. With the combined effect of spin-orbit coupling and magnetic field, the ground state experiences a transition from polar-core vortex to Mermin-Ho vortex, in which the canonical particle current is anticlockwise. For fixed spin-orbit coupling strengths, the evolution of phase winding, magnetization, and degree of phase separation with magnetic field are studied. Additionally, with further increasing spin-orbit coupling strength, the condensate exhibits symmetrical density domains separated by radial vortex arrays. Our work paves the way to explore exotic topological excitations in high-spin systems.
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Received: 20 October 2021
Revised: 11 November 2021
Accepted manuscript online: 15 November 2021
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PACS:
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03.75.Lm
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(Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)
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03.75.Hh
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(Static properties of condensates; thermodynamical, statistical, and structural properties)
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03.75.Nt
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(Other Bose-Einstein condensation phenomena)
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05.30.Jp
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(Boson systems)
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| Fund: 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), Beijing Natural Science Foundation, China (Grant No. 1182009), and Beijing Great Wall Talents Cultivation Program, China (Grant No. CIT&TCD20180325). |
Corresponding Authors:
Shou-Gen Yin, Wu-Ming Liu
E-mail: sgyin@tjut.edu.cn;wmliu@iphy.ac.cn
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Cite this article:
Hao Zhu(朱浩), Shou-Gen Yin(印寿根), and Wu-Ming Liu(刘伍明) Manipulating vortices in F=2 Bose-Einstein condensates through magnetic field and spin-orbit coupling 2022 Chin. Phys. B 31 040306
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