中国物理B ›› 2021, Vol. 30 ›› Issue (6): 60310-060310.doi: 10.1088/1674-1056/abf34a

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Dynamics of bright soliton in a spin-orbit coupled spin-1 Bose-Einstein condensate

Hui Guo(郭慧)1,2, Xu Qiu(邱旭)3,†, Yan Ma(马燕)1,2, Hai-Feng Jiang(姜海峰)1,2,4, and Xiao-Fei Zhang(张晓斐)1,2,‡   

  1. 1 Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences(CAS), Xi'an 710600, China;
    2 School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 School of Economics and Management, Chongqing Normal University, Chongqing 401331, China;
    4 CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China
  • 收稿日期:2020-11-28 修回日期:2020-12-31 接受日期:2021-01-07 出版日期:2021-05-18 发布日期:2021-05-25
  • 通讯作者: Xu Qiu, Xiao-Fei Zhang E-mail:aileenchur@126.com;xfzhang@ntsc.ac.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11775253) and the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. ZDBS-LY-7016).

Dynamics of bright soliton in a spin-orbit coupled spin-1 Bose-Einstein condensate

Hui Guo(郭慧)1,2, Xu Qiu(邱旭)3,†, Yan Ma(马燕)1,2, Hai-Feng Jiang(姜海峰)1,2,4, and Xiao-Fei Zhang(张晓斐)1,2,‡   

  1. 1 Key Laboratory of Time and Frequency Primary Standards, National Time Service Center, Chinese Academy of Sciences(CAS), Xi'an 710600, China;
    2 School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, China;
    3 School of Economics and Management, Chongqing Normal University, Chongqing 401331, China;
    4 CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China
  • Received:2020-11-28 Revised:2020-12-31 Accepted:2021-01-07 Online:2021-05-18 Published:2021-05-25
  • Contact: Xu Qiu, Xiao-Fei Zhang E-mail:aileenchur@126.com;xfzhang@ntsc.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11775253) and the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. ZDBS-LY-7016).

摘要: We have investigated the dynamics of bright solitons in a spin-orbit coupled spin-1 Bose-Einstein condensate analytically and numerically. By using the hyperbolic sine function as the trial function to describe a plane wave bright soliton with a single finite momentum, we have derived the motion equations of soliton's spin and center of mass, and obtained its exact analytical solutions. Our results show that the spin-orbit coupling couples the soliton's spin with its center-of-mass motion, the spin oscillations induced by the exchange of atoms between components result in the periodical oscillation of center-of-mass, and the motion of center of mass of soliton can be viewed as a superposition of periodical and linear motions. Our analytical results have also been confirmed by the direct numerical simulations of Gross-Pitaevskii equations.

关键词: Bose-Einstein condensate, spin-orbit coupling, soliton

Abstract: We have investigated the dynamics of bright solitons in a spin-orbit coupled spin-1 Bose-Einstein condensate analytically and numerically. By using the hyperbolic sine function as the trial function to describe a plane wave bright soliton with a single finite momentum, we have derived the motion equations of soliton's spin and center of mass, and obtained its exact analytical solutions. Our results show that the spin-orbit coupling couples the soliton's spin with its center-of-mass motion, the spin oscillations induced by the exchange of atoms between components result in the periodical oscillation of center-of-mass, and the motion of center of mass of soliton can be viewed as a superposition of periodical and linear motions. Our analytical results have also been confirmed by the direct numerical simulations of Gross-Pitaevskii equations.

Key words: Bose-Einstein condensate, spin-orbit coupling, soliton

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

  • 03.75.Lm
03.75.Mn (Multicomponent condensates; spinor condensates) 03.75.Kk (Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)