Phonon Spectrum and Modulational Instability in a Bose-Einstein Condensate Array
YANG Xiao-Xue1, WU Ying1,2
1State Key Laboratory for Laser Technique and Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
2Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
Phonon Spectrum and Modulational Instability in a Bose-Einstein Condensate Array
YANG Xiao-Xue1;WU Ying1,2
1State Key Laboratory for Laser Technique and Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
2Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
Abstract： We derive the phonon spectrum and the corresponding modulational instability conditions of an array of traps containing Bose-Einstein mcondensates with each trap linked to adjacent traps by tunneling. It is shown that modulational instability regimes always exist regardless of the sign of the two-body interaction.
YANG Xiao-Xue;WU Ying;. Phonon Spectrum and Modulational Instability in a Bose-Einstein Condensate Array[J]. 中国物理快报, 2002, 19(10): 1413-1415.
YANG Xiao-Xue, WU Ying,. Phonon Spectrum and Modulational Instability in a Bose-Einstein Condensate Array. Chin. Phys. Lett., 2002, 19(10): 1413-1415.
2002, Vol. 19 
