Stationary and moving solitons in spin-orbit-coupled spin-1 Bose-Einstein condensates  

作　　者：Yu-E Li Ju-Kui Xue 

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

出　　处：《Frontiers of physics》2018年第2期31-37,共7页物理学前沿（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China under Grant Nos. 11475027, 11764039, 11274255, and 11305132, the Natural Science Founda- tion of Gansu Province under Grant No. 17JR5RA076, and the Sci- entific Research Project of Gansu Higher Education under Crant No. 2016A-005.

摘　　要：We investigate the matter-wave sohtons in a spin-orbit-coupled spin-1 Bose-Einstein condensate us- ing a multiscale perturbation method. Beginning with the one-dimensional spin-orbit-coupled three- component Gross-Pitaevskii equations, we derive a single nonlinear SehrSdinger equation, which allows determination of the analytical soliton solutions of the system. Stationary and moving solitons in the system are derived. In particular, a parameter space for different existing soliton types is provided. It is shown that there exist only dark or bright sohtons when the spin-orbit coupling is weak, with the solitons depending onthe atomic interactions. However, when the spin-orbit coupling is strong, both dark and bright solitons exist, being determined by the Raman coupling. Our analytical solutions are confirmed by direct numerical simulations.We investigate the matter-wave sohtons in a spin-orbit-coupled spin-1 Bose-Einstein condensate us- ing a multiscale perturbation method. Beginning with the one-dimensional spin-orbit-coupled three- component Gross-Pitaevskii equations, we derive a single nonlinear SehrSdinger equation, which allows determination of the analytical soliton solutions of the system. Stationary and moving solitons in the system are derived. In particular, a parameter space for different existing soliton types is provided. It is shown that there exist only dark or bright sohtons when the spin-orbit coupling is weak, with the solitons depending onthe atomic interactions. However, when the spin-orbit coupling is strong, both dark and bright solitons exist, being determined by the Raman coupling. Our analytical solutions are confirmed by direct numerical simulations.

关 键 词：spin-orbit coupling Bose-Einstein condensate SOLITON perturbation method 

分 类 号：O412.1[理学—理论物理] TN946.7[理学—物理]