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Ground-state vortex structures of a rotating binary dipolar Bose-Einstein condensate confined in harmonic plus quartic potential |
| Guang-Ping Chen(陈光平)1, Chang-Bing Qiao(乔昌兵)2, Hui Guo(郭慧)3,4, Lin-Xue Wang(王林雪)3,4, Ya-Jun Wang(王雅君)3,4, Ren-Bing Tan(谭仁兵)5 |
1 School of Intelligent Manufacturing, Sichuan Art and Science University, Dazhou 635000, China;
2 School of Chemistry and Chemical Engineering, Sichuan Art and Science University, Dazhou 635000, China;
3 Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences, Xi'an 710600, China;
4 School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China;
5 College of Mathematics and Physics, Chongqing University of Science and Technology, Chongqing 401331, China |
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Abstract We consider a binary dipolar Bose-Einstein condensate confined in a rotating harmonic plus quartic potential trap. The ground-state vortex structures are numerically obtained as a function of the contact interactions and the dipole-dipole interaction in both slow and rapid rotation cases. The results show that the vortex configurations depend strongly on the strength of the contact interactions, the relative strength between dipolar and contact interactions, as well as on the orientation of the dipoles. A variety of exotic ground-state vortex structures, such as pentagonal and hexagon vortex lattice, square vortex lattice with a central vortex, annular vortex lines, and straight vortex lines, are observed by turning such controllable parameters. Our results deepen the understanding of effects of dipole-dipole interaction on the topological defects.
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Received: 26 June 2018
Revised: 08 November 2018
Accepted manuscript online:
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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.Mn
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(Multicomponent condensates; spinor condensates)
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05.30.Jp
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(Boson systems)
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| Fund: Project supported by the Sichuan Province Education Department Key Natural Science Fund, China (Grant No. 17ZA339), the Chongqing Research Program of Basic Research and Frontier Technology, China (Grant No. cstc2014jcyjA50016), and the National Natural Science Foundation of China (Grant No. 61504016). |
Corresponding Authors:
Guang-Ping Chen
E-mail: chengp205@126.com
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Cite this article:
Guang-Ping Chen(陈光平), Chang-Bing Qiao(乔昌兵), Hui Guo(郭慧), Lin-Xue Wang(王林雪), Ya-Jun Wang(王雅君), Ren-Bing Tan(谭仁兵) Ground-state vortex structures of a rotating binary dipolar Bose-Einstein condensate confined in harmonic plus quartic potential 2019 Chin. Phys. B 28 010308
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