Controllable Persistent Atom Current of Bose-Einstein Condensates in an Optical Lattice Ring  

作　　者：ZHENGGong-Ping LIANGJiu-Qing 

机构地区：[1]InstituteofTheoreticalPhysicsandDepartmentofPhysics,ShanxiUniversity,Taiyuan030006,China

出　　处：《Communications in Theoretical Physics》2005年第5期819-822,共4页理论物理通讯（英文版）

基　　金：国家自然科学基金

摘　　要：In this paper the macroscopic quantum state of Bose-Einstein condensates in optical lattices is studied by solving the periodic Gross-Pitaevskii equation in one-dimensional geometry. It is shown that an exact solution seen to be a travelling wave of excited macroscopic quantum states resultes in a persistent atom current, which can be controlled by adjusting of the barrier height of the optical periodic potential. A critical condition to generate the travelling wave is demonstrated and we moreover propose a practical experiment to realize the persistent atom current in a toroidal atom waveguide.

关 键 词：Bose-Einstein condensate persistent atom current 

分 类 号：O431.2[机械工程—光学工程]