Ground-state phase diagrams in spin–orbit coupled spin-3 Bose–Einstein condensates

Ground-state phase diagrams in spin–orbit coupled spin-3 Bose–Einstein condensates
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自旋轨道耦合自旋 3 玻色爱因斯坦凝聚体中的基态相图

DOI:
10.1016/j.physa.2022.127244
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发表时间:
2022-03
期刊:
Physica A: Statistical Mechanics and its Applications
影响因子:
--
通讯作者:
Shi-Jie Yang
Shi-Jie Yang
中科院分区:
其他
文献类型:
--
作者:
Ji-Guo Wang;Yue-Qing Li;Shi-Jie Yang

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研究了自旋轨道耦合的自旋3玻色-爱因斯坦凝聚在自旋单重态相互作用下的基态相。相互作用和自旋轨道耦合之间的竞争产生了丰富的基态相。对于具有吸引自旋单重态相互作用的系统,发现了具有弱自旋轨道耦合强度的条纹相。较大的自旋-轨道耦合驱动条纹弯曲,这增强了具有吸引力的自旋-五重态相互作用的环相的产生。结合自旋轨道耦合和排斥自旋五重态相互作用,形成两种晶格相,即矩形晶格相和八边形晶格相。具有排斥性自旋单重态相互作用的系统比具有吸引性自旋单重态相互作用的系统具有更丰富的基态相。识别出六个不同的基态相位,即,条纹相、环形相、过渡相、三角形晶格相、矩形晶格相和八边形晶格相。这些基态相显示出丰富的相图。我们比较了基态能量突变点和相变边界,发现它们在定量上是一致的。
We study the ground-state phases of spin–orbit coupled spin-3 Bose–Einstein condensates with the attractive and repulsive spin–singlet interactions, respectively. The competition between the interactions and spin–orbit coupling gives rise to abundant ground-state phases. For the system with the attractive spin–singlet interaction, a stripe phase is found with the weak spin–orbit coupling strength. The larger spin–orbit coupling drives the stripes to bend, which enhances the creation of the ring phase with the attractive spin–quintet interaction. Combining spin–orbit coupling and the repulsive spin–quintet interaction, two kinds of lattice phases are formed, namely the rectangular lattice and octagonal lattice phases. The system with the repulsive spin–singlet interaction possesses richer ground-state phases than the system dominated by the attractive spin–singlet interaction. Six distinct ground-state phases are identified, i.e., the stripe phase, the ring phase, the transition phase, the triangular lattice phase, the rectangular lattice phase and the octagonal lattice phase. These ground-state phase display a rich phase diagram. We compare the ground-state energies mutation point with the phase transition boundaries, and find that they are in good quantitative agreement.
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