Dark soliton in one-dimensional Bose–Einstein condensate under a periodic perturbation of trap

doi:10.1088/1674-1056/20/1/010309

Abstract The perturbation of a confining trap leads to the collective oscillation of a Bose–Einstein condensate, thereby the propagation of a dark soliton in the condensate is affected. In this study, periodic perturbation is employed to match the soliton oscillation. We find that the soliton dynamics depends sensitively on the coupling between the moving direction of the trap and that of the soliton. The soliton energy/depth evolves periodically, and a relevant shift in the soliton trajectory occurs as compared with the unperturbed case. Overall, the soliton oscillation frequency changes little even if the perturbation amplitude and frequency vary.

Keywords: Bose–Einstein condensate dark soliton

Received: 07 March 2010
Revised: 20 April 2010
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)

Fund: Project supported by the General Project of Hunan Provincial Educational Department of China (Grant No. 07C754), and the National Natural Science Foundation of China (Grant No. 30570432).

Cite this article:

Liu Chao-Fei(刘超飞),Hu Ke(胡柯),Hu Tao(胡涛),and Tang Yi(唐翌) Dark soliton in one-dimensional Bose–Einstein condensate under a periodic perturbation of trap 2011 Chin. Phys. B 20 010309

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Dark soliton in one-dimensional Bose–Einstein condensate under a periodic perturbation of trap

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