散射长度周期变化下三势阱中玻色-爱因斯坦凝聚体的稳定性和隧穿特性研究  

Study on Sta b ility and the Tunneling Characteristics a b out Bose Einstein Condensates in Triple-Potential Well Traped under a Periodically Varying Scattering Length

作　　者：穆爱霞[1] 

机构地区：[1]平凉医学高等专科学校

出　　处：《物理通报》2013年第11期98-101,共4页Physics Bulletin

摘　　要：本文着重研究受到非弹性碰撞相互作用,即考虑有三体复合耗散和原子填充时,散射长度周期变化下三势阱中玻色-爱因斯坦凝聚体的稳定性和隧穿特性研究.首先运用三模近似,得到三个耦合的GP方程,用数值的方法得到散射长度周期变化的数值结果.研究表明该体系的隧穿动力学和自俘获可以被周期变化的散射长度有效地调节,即在高、中、低频调制时,系统会在自俘获和周期运动间转化.In this thesis, We investigate the characteristics of tunneling and stability in triple-well trapped Bose-Einstein condensates with atoms feeding and loss effects, a periodically time-varying atomic scattering length problem in triple-well trapped Bose- Einstein condensates are investigated. Using three - mode approximation, three coupled Gross - Pitaevskii equations（GPEs） are modified to describe the dynamics of the system. The corresponding numerical results show that this system of the tunneling dynamics can be adjusted by scattering length, and the numerical results show in the high frequency.low frequency and intermediate frequency modulation, the system can be changed between the self- trapping and macroscopic tunnelling states.

关 键 词：玻色-爱因斯坦凝聚体 三体复合相互作用 自俘获 量子隧穿 

分 类 号：O469[理学—凝聚态物理]