Collective Excitations and Nonlinear Dynamics of 1D BEC with Two-and Three-body Interactions in Anharmonic Traps  

作　　者：LI Guan-Qiang PENG Ping LIU Jian-Ke XUE Ju-Kui 

机构地区：[1]Faculty of Science, Shaanxi University of Science and Technology, Xi＇an 710021, China [2]physics and Electronics Engineering College, Northwest Normal University, Lanzhou 730070, China

出　　处：《Communications in Theoretical Physics》2008年第11期1129-1136,共8页理论物理通讯（英文版）

基　　金：supported by the Natural Science Foundation of Shaanxi University of Science and Technology under Grant No.SUST-ZX07-32;partly by National Natural Science Foundation of China under Grant No.10774120

摘　　要：The collective excitations of low-dimensional Bose-Einstein condensates with two- and three-body interactions in anharmonic potentials are investigated. Using the standard variational approach, the governing equations of motions for the low-energy excitations are obtained by solving time-dependent Gross-Pitaevskii-Ginzburg equation, and the excitation spectrums are calculated in small amplitude limit. The frequency shift and nonlinear mode coupling induced by the anharmonic distortion （adding cubic, quartic, or quintic terra to a harmonic trap） are studied.

关 键 词：collective excitations Gross-Pitaevskii-Ginzburg equation anharmouic trapping potentials frequency shift of low-energy excitations non-resonant mode coupling 

分 类 号：O4[理学—物理]