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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 |
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Cite this article: |
YANG Xiao-Xue, WU Ying 2002 Chin. Phys. Lett. 19 1413-1415 |
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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.
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Keywords:
03.75.Fi
42.65.-k
42.50.Ar
42.81.Dp
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Published: 01 October 2002
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