Korteweg de Vries description of dark solitons in Bose-Einstein condensates

被引：17

作者：

Huang, GX ^{[1
]}

机构：

[1] E China Normal Univ, Key Lab Opt & Magnet Resonance Spect, Shanghai 200062, Peoples R China

[2] E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2001年 / 18卷 / 05期

关键词：

D O I：

10.1088/0256-307X/18/5/302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the dynamics of pulses in a cigar-shaped Bose-Einstein condensate with repulsive atom-atom interactions without using Thomas-Fermi approximation. In the linear level our results give the Bogoliubov excitation spectrum for sound propagation with speed c = c(0)/root2, where co is the speed for the case without a trap. We develop a Korteweg de Vries (KdV) description for dark soliton propagation in the system and show that it is the quantum pressure that contributes the dispersion necessary for the formation of the dark solitons.

引用

页码：628 / 630

页数：3

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