Nonlinear Landau-Zener Tunnelling with Two and Three-Body Interactions  

作　　者：魏秀芳 唐荣安 雍文梅 薛具奎 

机构地区：[1]College of Physics and Electronics Engineering, Northwest Normal University, Lanzhou 730070 [2]Department of Physics, Lanzhou City University, Lanzhou 730070

出　　处：《Chinese Physics Letters》2008年第5期1564-1567,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10774120, the Natural Science Foundation of Gansu Province under Grant No 3ZS051-A25-013, and the Creation of Science and Technology of Northwest Normal University under Grant No NWNU-KJCXGC-03-17.

摘　　要：We investigate the nonlinear Landau-Zener tunnelling of Bose-Einstein condensate （BEC） in an accelerating optical lattice with two- and three-body interactions between the particles. The influence of the three-body interaction on the eigenstates and the transition probability are discussed both anaJytically and numerically. The analytical eigenstates and the tunnelling probability are obtained, which are verified by numerical methods. It is shown that the eigenstates and the tunnelling probability are modified dramatically by three-body interaction.We investigate the nonlinear Landau-Zener tunnelling of Bose-Einstein condensate （BEC） in an accelerating optical lattice with two- and three-body interactions between the particles. The influence of the three-body interaction on the eigenstates and the transition probability are discussed both anaJytically and numerically. The analytical eigenstates and the tunnelling probability are obtained, which are verified by numerical methods. It is shown that the eigenstates and the tunnelling probability are modified dramatically by three-body interaction.

关 键 词：SCHRODINGER-EQUATION OPTICAL LATTICES EINSTEIN DYNAMICS 

分 类 号：O413[理学—理论物理]