环形阱中偶极玻色凝聚体的拓扑激发  

Topological Excitation of Dipolar Dresselhaus Spin-orbit Coupled Bose-Einstein Condensates in Annular Trap

作　　者：杨慧[1] 菅在河[1] YANG Hui;JIAN Zai-he(Physics Department,Xinzhou Teachers University,Xinzhou 034000,China)

机构地区：[1]忻州师范学院物理系,忻州山西034000

出　　处：《长春师范大学学报》2023年第2期31-34,共4页Journal of Changchun Normal University

基　　金：忻州师范学院教学改革创新项目“理论力学课程项目化教学改革研究”(JGYB202201)。

摘　　要：基于Peaceman-Rachford算法的虚时传播法,利用平均场理论并结合数值计算求解耦合Gross-Pitaevskii方程组得到系统基态波函数,研究了囚禁于环形阱中具有偶极-偶极相互作用的玻色-爱因斯坦凝聚体的拓扑激发,探索了偶极相互作用对系统具有固定Dresselhaus自旋轨道耦合凝聚体拓扑激发的影响。研究发现,调控偶极-偶极相互作用可以得到体系不同的拓扑激发态,同时实现不同基态相间的转化。在偶极-偶极相互作用和Dresselhaus自旋轨道耦合作用下体系表现出丰富而奇异的拓扑激发,包括半量子涡旋、涡旋串和涡旋对等。We consider the topological excitation of Bose-Einstein condensates in a annular trap.We study the effect of dipole-dipole interaction on the ground-state structures with the fixed Dresselhaus spin-orbit coupling.Results show that the dipole-dipole interaction can be used to obtain the desired ground state phases,and to control the phase transition between different ground states.Meanwhile,with dipole interaction and Dresselhaus spin-orbit coupling,the system exhibits rich and strange topological excitations,such as half quantum vortex,vortex string,vortex pair,and so on.

关 键 词：玻色-爱因斯坦凝聚体 环形阱 偶极-偶极相互作用 涡旋 

分 类 号：O562[理学—原子与分子物理]