| Vortices in dipolar Bose–Einstein condensates in synthetic magnetic field |
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| 引用本文： | 赵强,顾强.Vortices in dipolar Bose–Einstein condensates in synthetic magnetic field[J].中国物理 B,2016,25(1):16702-016702. |
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| 作者姓名： | 赵强 顾强 |
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| 作者单位： | 1. Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;2. School of Science, North China University of Science and Technology, Tangshan 063009, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No. 11274039), the National Basic Research Program of China (Grant No. 2013CB922002), and the Fundamental Research Funds for the Central Universities of China. |
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| 摘 要： | We study the formation of vortices in a dipolar Bose–Einstein condensate in a synthetic magnetic field by numerically solving the Gross–Pitaevskii equation. The formation process depends on the dipole strength, the rotating frequency, the potential geometry, and the orientation of the dipoles. We make an extensive comparison with vortices created by a rotating trap, especially focusing on the issues of the critical rotating frequency and the vortex number as a function of the rotating frequency. We observe that a higher rotating frequency is needed to generate a large number of vortices and the anisotropic interaction manifests itself as a perceptible difference in the vortex formation. Furthermore, a large dipole strength or aspect ratio also can increase the number of vortices effectively. In particular, we discuss the validity of the Feynman rule.
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| 收稿时间： | 2015-10-20 |
Vortices in dipolar Bose-Einstein condensates in synthetic magnetic field |
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| Institution: | 1. Department of Physics, University of Science and Technology Beijing, Beijing 100083, China;2. School of Science, North China University of Science and Technology, Tangshan 063009, China |
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| Abstract: | We study the formation of vortices in a dipolar Bose-Einstein condensate in a synthetic magnetic field by numerically solving the Gross-Pitaevskii equation. The formation process depends on the dipole strength, the rotating frequency, the potential geometry, and the orientation of the dipoles. We make an extensive comparison with vortices created by a rotating trap, especially focusing on the issues of the critical rotating frequency and the vortex number as a function of the rotating frequency. We observe that a higher rotating frequency is needed to generate a large number of vortices and the anisotropic interaction manifests itself as a perceptible difference in the vortex formation. Furthermore, a large dipole strength or aspect ratio also can increase the number of vortices effectively. In particular, we discuss the validity of the Feynman rule. |
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| Keywords: | dipolar condensates vortex synthetic magnetic field |
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