,Phonon Spectrum and Modulational Instability in a Bose-Einstein Condensate Array

• 作 者: 杨晓雪 吴颖
• 机 构: State Key Laboratory for Laser Technique and Department of Physics, Huazhong University of Science a
• 出 处: 中国物理快报（英文版）
• 发表日期: 2002年10期

We derive the phonon spectrum and the corresponding modulational instability conditions of an array of trapscontaining Bose-Einstein condensates with each trap linked to adjacent traps by tunnelling. It is shown thatmodulational instability regimes always exist regardless of the sign of the two-body interaction.