| Dark Lump Excitations in Bose—Einstein Condensates |
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| 引用本文： | 黄国翔,朱善华.Dark Lump Excitations in Bose—Einstein Condensates[J].中国物理快报,2002,19(1):17-19. |
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| 作者姓名： | 黄国翔 朱善华 |
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| 作者单位： | [1]KeyLaboratoryforOpticalandMagneticResonanceSpectroscopyandDepartmentofPhysics,EastChinaNormalUniversity,Shanghai200062 [2]KeyLaboratoryforOpticalandMagneticResonanceSpectroscopyandDepartmentofPhysics,Eas |
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| 摘 要： | We investigate the dynamics of two-dimensional matter-wave pulses in a Bose-Einstein condensate with diskshaped traps.For the case of repulsive atom-atom interactions,a Kadomtsev-Petviashvili equation with positive dipersion is derived using the method of multiple scales.The results show that it is possible to excite dark lump-like two-dimensional nonlinear excitations in the Bose-Einstein condensate.
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| 关 键 词： | 原子气体 玻色－爱因斯坦凝聚态 弱作用原子 |
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