摘要
考虑时间相关的种间相互吸引作用,研究了局限于谐振外部势阱中的二元玻色-爱因斯坦凝聚体中亮-亮孤子的传播特性.结果表明,当种内和种间相互吸引作用都不变时,亮-亮孤子呈现出周期性的振荡;如果种内相互吸引作用仍保持不变,而种间相互吸引作用随时间指数增加时,发现凝聚体中产生振荡-局域转变行为,且这种振荡-局域的转变行为可通过调节谐振势阱的横向囚禁频率来控制.此外,还设计了实验方案来观察孤子的这种振荡-局域转变行为.
Considering the time-dependent interspecies interactions, we study the dynamic behaviors of bright-bright solitons in two species Bose-Einstein condensates in the harmonic external potentials. In the presence of unchanged attractive interspecies and intraspecies interactions, bright-bright solitons exhibit periodic oscillations. When the attractive intraspecies interactions are fixed but the attractive interspecies interactions are increased exponentially, interestingly, a transition behavior from oscillation to localization is observed. Meanwhile, this transition behavior can be controlled by tuning the transverse trapping frequency of harmonic potential. Furthermore, an experimental protocol is designed to observe the transition behavior in the current experimental conditions.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第23期122-127,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:51032002
11074212)
国家高技术研究发展计划(批准号:2011AA050526)资助的课题~~
关键词
二元玻色
爱因斯坦凝聚
亮-亮孤子
原子间相互作用
two species Bose-Einstein condensates, bright-bright solitons, atomic interactions
