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

• 来源期刊: 中国物理B（英文版）
• 关键词: bright solitons spin–orbit interaction spin polarization
• 年，卷（期）: 2018,（1）
• 页码范围: 472-477
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/27/1/016702

摘要

We study two types of bright solitons in an attractive Bose–Einstein condensate with a spin–orbit interaction. By solving the coupled nonlinear Schr?dinger 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.