Dynamical nonlinear excitations induced by interaction quench in a two-dimensional box-trapped Bose-Einstein condensate

作     者：牛真霞 高超 Zhen-Xia Niu;Chao Gao

作者机构：Department of PhysicsZhejiang Normal UniversityJinhua 321004China Key Laboratory of Optical Information Detection and Display Technology of ZhejiangZhejiang Normal UniversityJinhua 321004China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2024年第33卷第2期

页      面：209-215页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：Project supported by the Natural Science Foundation of Zhejiang Province of China(Grant Nos.LQ22A040006,LY21A040004,LR22A040001,and LZ21A040001) the National Natural Science Foundation of China(Grant Nos.11835011 and 12074342) 

主　　题：Bose-Einstein condensate quench interaction soliton vortex 

摘      要：Manipulating nonlinear excitations,including solitons and vortices,is an essential topic in quantum many-body physics.A new progress in this direction is a protocol proposed in[***.2043256(2020)]to produce dark solitons in a one-dimensional atomic Bose–Einstein condensate(BEC)by quenching inter-atomic *** by this work,we generalize the protocol to a two-dimensional BEC and investigate the generic scenario of its post-quench *** an isotropic disk trap with a hard-wall boundary,we find that successive inward-moving ring dark solitons(RDSs)can be induced from the edge,and the number of RDSs can be controlled by tuning the ratio of the after-and before-quench interaction strength across different critical *** role of the quench played on the profiles of the density,phase,and sound velocity is also *** to the snake instability,the RDSs then become vortex–antivortex pairs with peculiar dynamics managed by the initial density and the after-quench *** tuning the geometry of the box traps,demonstrated as polygonal ones,more subtle dynamics of solitons and vortices are *** proposed protocol and the discovered rich dynamical effects on nonlinear excitations can be realized in near future cold-atom experiments.