Effect of a barrier potential on soliton dynamical characteristics in condensates

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

摘要/Abstract

摘要： 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.

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.

Key words: Bose--Einstein condensates, solitons, barrier potential

中图分类号: (Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations)

03.75.Lm

03.75.Kk (Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow)

李锦茴. Effect of a barrier potential on soliton dynamical characteristics in condensates[J]. 中国物理B, 2010, 19(4): 40502-040502.

Li Jin-Hui(李锦茴). Effect of a barrier potential on soliton dynamical characteristics in condensates[J]. Chin. Phys. B, 2010, 19(4): 40502-040502.

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