Vortex lattices in a rotating spin-orbit coupled spin-1/2 Bose-Einstein condensates with spatially modulated nonlinear interaction

Vortex lattices in a rotating spin-orbit coupled spin-1/2 Bose-Einstein condensates with spatially modulated nonlinear interaction
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具有空间调制非线性相互作用的旋转自旋轨道耦合自旋 1/2 玻色-爱因斯坦凝聚体中的涡旋晶格

DOI:
10.1016/j.rinp.2020.103099
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发表时间:
2020-06
期刊:
影响因子:
5.3
通讯作者:
Li Yue-Qing
Li Yue-Qing
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wang Ji-Guo;Li Yue-Qing

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本文研究了二维自旋轨道耦合的自旋1/2玻色-爱因斯坦凝聚体在恒定相互作用和空间调制非线性相互作用下的基态相位。通过与具有恒定相互作用的基态相比较,空间调制非线性相互作用不仅促进了基态相的实现,而且保护了涡线结构的稳定性。在空间调制的非线性相互作用下,随着旋转频率的增加,沿沿着方向各层中的涡旋数依次增加,且涡旋在中心附近均匀分布。研究了具有空间调制非线性相互作用的基态相图,发现了多种涡旋格子相。
We study the ground-state phases of a two-dimensional rotating spin-orbit coupled spin-1/2 Bose-Einstein condensates with constant interaction and spatially modulated nonlinear interaction, respectively. By comparing with the ground-state phases with constant interaction, the spatially modulated nonlinear interaction not only promotes the realization of ground-state phase but also protects the stability of the vortex line structure. Under the action of the spatially modulated nonlinear interaction, we find that the number of vortices in the every layer along the azimuthal direction successively increases as the rotational frequency enhances, and the vortices are uniformed distributed around the center. The ground-state phase diagram with spatially modulated nonlinear interaction is also studied, a variety of the vortex lattice phases are found.
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