Nonlinear dynamical stability of gap solitons in Bose-Einstein condensate loaded in a deformed honeycomb optical lattice  

作　　者：Hongjuan Meng Yushan Zhou Xueping Ren Xiaohuan Wan Juan Zhang Jing Wang Xiaobei Fan Wenyuan Wang Yuren Shi 蒙红娟;周玉珊;任雪平;万晓欢;张娟;王静;樊小贝;王文元;石玉仁(College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,China;Key Laboratory of Atomic and Molecular Physics&Functional Materials of Gansu Province,Northwest Normal University,Lanzhou 730070,China)

机构地区：[1]College of Physics and Electronic Engineering,Northwest Normal University,Lanzhou 730070,China [2]Key Laboratory of Atomic and Molecular Physics&Functional Materials of Gansu Province,Northwest Normal University,Lanzhou 730070,China

出　　处：《Chinese Physics B》2021年第12期529-538,共10页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.12065022,12005173,11747018,and 11565021);the Natural Science Foundation of Gansu Province of China(Grant No.20JR10RA082);the China Postdoctoral Science Foundation(Grant No.2020M680318);the Scientific Research Foundation of NWNU(Grant No.NWNU-LKQN-16-3)。

摘　　要：We investigate the existence and dynamical stability of multipole gap solitons in Bose-Einstein condensate loaded in a deformed honeycomb optical lattice.Honeycomb lattices possess a unique band structure,the first and second bands intersect at a set of so-called Dirac points.Deformation can result in the merging and disappearance of the Dirac points,and support the gap solitons.We find that the two-dimensional honeycomb optical lattices admit multipole gap solitons.These multipoles can have their bright solitary structures being in-phase or out-of-phase.We also investigate the linear stabilities and nonlinear stabilities of these gap solitons.These results have applications of the localized structures in nonlinear optics,and may helpful for exploiting topological properties of a deformed lattice.

关 键 词：gap soliton Bose-Einstein condensate deformed honeycomb optical lattice 

分 类 号：O469[理学—凝聚态物理]