Ground state of Rydberg-dressed Bose gas confined in a toroidal trap  

作　　者：Lin-Xue Wang Hong-Li Yang Hui Liu Si-Lin Chen Ya-Jun Wang Xiao-Fei Zhang 

机构地区：[1]Department of Physics,School of Physics and Information Science,Shaanxi University of Science and Technology,Xi'an 710021,China [2]Department of Basic Sciences,Air Force Engineering University,Xi'an 710051,China

出　　处：《Communications in Theoretical Physics》2024年第1期29-35,共7页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grants No.12005125,No.12105365,12175129;the Key Research Program of Frontier Sciences of Chinese Academy of Sciences under Grant No.ZDBS-LY-7016;Shaanxi Fundamental Science Research Project for Mathematics and Physics under Grant No.22JSY034;Scientific Research Program Funded by Shaanxi Provincial Education Department Program No.23JP020;the Youth Innovation Team of Shaanxi Universities。

摘　　要：The experimental realization of Rydberg dressing technology in ultracold atomic systems provides another superior platform for studying novel states of matter and macroscopic quantum phenomena.In this work,based on the mean-field theory,we have investigated the ground-state phases of a two-component Bose–Einstein condensate with Rydberg interaction and confined in a toroidal trap.The effects of the Rydberg interaction and external potential,especially the Rydberg blockade radius,on the ground-state structure of such a system have been investigated in full parameter space.Our results show that the Rydberg blockade radius,which can be regarded as another controllable parameter,can be used to obtain a variety of ground-state phases.More interestingly,it is found that for weak Rydberg interactions,the Rydberg blockade radius breaks the spontaneous rotational symmetry of the system,leading to the formation of a discrete unit cell structure.For strongly interacting cases,it can be used to realize different orders of discrete rotational symmetry breaking.

关 键 词：Bose-Einstein condensate Rydberg dressing toroidal trap 

分 类 号：O469[理学—凝聚态物理]