We investigate domain wall excitations in a two-component Bose–Einstein condensate with two-body interactions and pair-transition effects. It is shown that domain wall excitations can be described exactly by kink and...We investigate domain wall excitations in a two-component Bose–Einstein condensate with two-body interactions and pair-transition effects. It is shown that domain wall excitations can be described exactly by kink and anti-kink excitations in each component. The domain wall solutions are given analytically, which exist with different conditions compared with the domain wall reported before. Bubble-droplet structure can be also obtained from the fundamental domain wall, and their interactions are investigated analytically. Especially, domain wall interactions demonstrate some striking particle transition dynamics. These striking transition effects make the domain wall admit quite different collision behavior, in contrast to the collision between solitons or other nonlinear waves. The collisions between kinks induce some phase shift, which makes the domain wall change greatly. Their collisions can be elastic or inelastic with proper combination of fundamental domain walls. These characters can be used to manipulate one domain wall by interacting with other ones.展开更多
We investigate kink-dark complex solitons(KDCSs)in a three-component Bose–Einstein condensate(BEC)with repulsive interactions and pair-transition(PT)effects.Soliton profiles critically depend on the phase differences...We investigate kink-dark complex solitons(KDCSs)in a three-component Bose–Einstein condensate(BEC)with repulsive interactions and pair-transition(PT)effects.Soliton profiles critically depend on the phase differences between dark solitons excitation elements.We report a type of kink-dark soliton profile which shows a droplet-bubble-droplet with a density dip,in sharp contrast to previously studied bubble-droplets.The interaction between two KDCSs is further investigated.It demonstrates some striking particle transition behaviours during their collision processes,while soliton profiles survive after the collision.Additionally,we exhibit the state transition dynamics between a kink soliton and a dark soliton.These results suggest that PT effects can induce more abundant complex solitons dynamics in multi-component BEC.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.11775176)the Major Basic Research Program of the Natural Science Foundation of Shaanxi Province,China(Grant No.2018KJXX-094)the Key Innovative Research Team of Quantum Many-Body Theory and Quantum Control in Shaanxi Province,China(Grant No.2017KCT-12)
文摘We investigate domain wall excitations in a two-component Bose–Einstein condensate with two-body interactions and pair-transition effects. It is shown that domain wall excitations can be described exactly by kink and anti-kink excitations in each component. The domain wall solutions are given analytically, which exist with different conditions compared with the domain wall reported before. Bubble-droplet structure can be also obtained from the fundamental domain wall, and their interactions are investigated analytically. Especially, domain wall interactions demonstrate some striking particle transition dynamics. These striking transition effects make the domain wall admit quite different collision behavior, in contrast to the collision between solitons or other nonlinear waves. The collisions between kinks induce some phase shift, which makes the domain wall change greatly. Their collisions can be elastic or inelastic with proper combination of fundamental domain walls. These characters can be used to manipulate one domain wall by interacting with other ones.
基金supported by the National Natural Science Foundation of China(Contract No.12022513,11775176,11947301)the Major Basic Research Program of Natural Science of Shaanxi Province(Grant No.2018KJXX-094)the Scientific Research Program Funded by Shaanxi Provincial Education Department(Grant No.20JK0872 and 2017KCT-12)。
文摘We investigate kink-dark complex solitons(KDCSs)in a three-component Bose–Einstein condensate(BEC)with repulsive interactions and pair-transition(PT)effects.Soliton profiles critically depend on the phase differences between dark solitons excitation elements.We report a type of kink-dark soliton profile which shows a droplet-bubble-droplet with a density dip,in sharp contrast to previously studied bubble-droplets.The interaction between two KDCSs is further investigated.It demonstrates some striking particle transition behaviours during their collision processes,while soliton profiles survive after the collision.Additionally,we exhibit the state transition dynamics between a kink soliton and a dark soliton.These results suggest that PT effects can induce more abundant complex solitons dynamics in multi-component BEC.
