中国物理B ›› 2016, Vol. 25 ›› Issue (1): 16702-016702.doi: 10.1088/1674-1056/25/1/016702

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Vortices in dipolar Bose-Einstein condensates in synthetic magnetic field

Qiang Zhao(赵强) and Qiang Gu(顾强)   

  1. 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
  • 收稿日期:2015-10-20 出版日期:2016-01-05 发布日期:2016-01-05
  • 通讯作者: Qiang Gu E-mail:qgu@ustb.edu.cn
  • 基金资助:
    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.

Vortices in dipolar Bose-Einstein condensates in synthetic magnetic field

Qiang Zhao(赵强)1,2 and Qiang Gu(顾强)1   

  1. 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
  • Received:2015-10-20 Online:2016-01-05 Published:2016-01-05
  • Contact: Qiang Gu E-mail:qgu@ustb.edu.cn
  • Supported by:
    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.

关键词: dipolar condensates, vortex, synthetic magnetic field

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.

Key words: dipolar condensates, vortex, synthetic magnetic field

中图分类号:  (Dynamic properties of condensates; excitations, and superfluid flow)

  • 67.85.De
03.75.Hh (Static properties of condensates; thermodynamical, statistical, and structural properties) 05.30.Jp (Boson systems)