周期莫尔晶格中里德伯缀饰玻色气体的基态结构

Ground state of Rydberg-dressed Bose gas confined in periodic moirélattices

里德伯缀饰和自旋轨道耦合的实验实现极大地拓宽了冷原子作为量子模拟平台的研究视野.本文研究了莫尔晶格中里德伯缀饰自旋轨道耦合玻色气体的基态结构,探索了非局域里德伯相互作用和自旋轨道耦合强度对该系统基态的影响.研究发现,当出现非局域里德伯相互作用时,系统不再具有平移对称性,倾向于形成更多更规则的周期性结构;当存在自旋轨道耦合相互作用时,系统的基态在此周期性结构的基础上,将呈现出更加丰富的内部结构.

The experimental realization of Rydberg dressing and spin-orbit coupling greatly broadens the research field of ultracold atoms as a quantum simulation platform.Very recently,moirélattices have attracted intensive study,ranging from condensed matter to ultracold physics.In this paper,the ground-state structure of Rydberg-dressed Bose gas with spin-orbit coupling and confined in moirélattices is studied,and the effects of nonlocal Rydberg interaction and spin-orbit coupling on the ground state of the system are explored.Our results show that the system has no translational symmetry due to the presence of nonlocal Rydberg interaction,and more and more regular periodic structures present with the increases of the strength of nonlocal Rydberg interaction.In the presence of spin-orbit coupling,the Hamiltonian of the system has an imaginary part,and the phase of the system is not uniformly distributed.It is found that the ground state of the system with spin-orbit coupling present more abundant internal structure base on these periodic structures.The results pave the way for future study of moiréphysics in ultracold atom system.