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Chin. Phys. B, 2008, Vol. 17(4): 1189-1195    DOI: 10.1088/1674-1056/17/4/007
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Effect of interaction strength on gap solitons of Bose--Einstein condensates in optical lattices

Yang Ru-Shu(杨如曙) and Yang Jiang-He(杨江河)
Department of Electric Engineering, Hunan University of Arts and Science, Changde 415000, China
Abstract  We have developed a systematic analytical approach to the study on the dynamic properties of the linear and the nonlinear excitations for quasi-one-dimensional Bose--Einstein condensate trapped in optical lattices. A novel linear dispersion relation and an algebraic soliton solution of the condensate are derived analytically under consideration of Bose--Einstein condensate with a periodic potential. By analysing the soliton solution, we find that the interatomic interaction strength has an important effect on soliton dynamic properties of Bose--Einstein condensate.
Keywords:  Bose--Einstein condensates      solitons      optical lattices  
Received:  08 August 2007      Revised:  29 October 2007      Accepted manuscript online: 
PACS:  03.75.Lm (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)  
  05.45.Yv (Solitons)  

Cite this article: 

Yang Ru-Shu(杨如曙) and Yang Jiang-He(杨江河) Effect of interaction strength on gap solitons of Bose--Einstein condensates in optical lattices 2008 Chin. Phys. B 17 1189

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