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Chin. Phys. B, 2010, Vol. 19(4): 040502    DOI: 10.1088/1674-1056/19/4/040502
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Effect of a barrier potential on soliton dynamical characteristics in condensates

Li Jin-Hui(李锦茴)
Mathematics and Science Department, Hunan First Normal University, Changsha 410205, China
Abstract  By using the multiple-scale method, this paper analytically studies the effect of a barrier potential on the dynamical characteristics of the soliton in Bose--Einstein condensates. It is shown that a stable soliton is exhibited at the top of the barrier potential and the region of the absence of the barrier potential. Meanwhile, it is found that the height of the barrier potential has an important effect on the dark soliton dynamical characteristics in the condensates. With the increase of height of the barrier potential, the amplitude of the dark soliton becomes smaller, its width is narrower, and the soliton propagates more slowly.
Keywords:  Bose--Einstein condensates      solitons      barrier potential  
Received:  16 August 2009      Revised:  03 September 2009      Accepted manuscript online: 
PACS:  03.75.Lm (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)  
  03.75.Kk (Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)  

Cite this article: 

Li Jin-Hui(李锦茴) Effect of a barrier potential on soliton dynamical characteristics in condensates 2010 Chin. Phys. B 19 040502

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