Effect of a barrier potential on soliton dynamical characteristics in condensates

doi:10.1088/1674-1056/19/4/040502

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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