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Chin. Phys. B, 2018, Vol. 27(1): 016702    DOI: 10.1088/1674-1056/27/1/016702

Two types of ground-state bright solitons in a coupled harmonically trapped pseudo-spin polarization Bose–Einstein condensate

T F Xu(徐天赋)
Hebei Key Laboratory of Microstructural Material Physics, School of Science, Yanshan University, Qinhuangdao 066004, China
Abstract  We study two types of bright solitons in an attractive Bose-Einstein condensate with a spin-orbit interaction. By solving the coupled nonlinear Schrödinger equations with the variational method and the imaginary time evolution method, fundamental properties of solitons are carefully investigated in different parameter regimes. It is shown that the detuning between the Raman beam and energy states of the atoms dominates the ground state type and spin polarization strength. The soliton dynamics is also studied for various moving velocities for zero and nonzero detuning cases. We find that the shape of individual component solitons can be maintained when the moving speed of solitons is low and the detuning is small in the coupled harmonically trapped pseudo-spin polarization Bose-Einstein condensate.
Keywords:  bright solitons      spin-orbit interaction      spin polarization  
Received:  07 August 2017      Published:  05 January 2018
PACS:  67.85.-d (Ultracold gases, trapped gases)  
  03.75.Lm (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11304270 and 11475144).
Corresponding Authors:  T F Xu     E-mail:

Cite this article: 

T F Xu(徐天赋) Two types of ground-state bright solitons in a coupled harmonically trapped pseudo-spin polarization Bose–Einstein condensate 2018 Chin. Phys. B 27 016702

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