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Collective Excitations and Nonlinear Dynamics of 1D BEC with Two-and Three-body Interactions in Anharmonic Traps
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作者 LI Guan-Qiang PENG Ping +1 位作者 LIU Jian-Ke XUE Ju-Kui 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第11期1129-1136,共8页
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... 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. 展开更多
关键词 collective excitations Gross-Pitaevskii-Ginzburg equation anharmouic trapping potentials frequency shift of low-energy excitations non-resonant mode coupling
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