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

Chin. Phys. Lett.

2002, Vol. 19

Issue (10): 1413-1415 DOI:

Original Articles

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

YANG Xiao-Xue¹;WU Ying^1,2

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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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.

Keywords: 03.75.Fi 42.65.-k 42.50.Ar 42.81.Dp

Published: 01 October 2002

PACS:	03.75.Fi
	42.65.-k	(Nonlinear optics)
	42.50.Ar
	42.81.Dp	(Propagation, scattering, and losses; solitons)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2002/V19/I10/01413

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