Trapped bright matter-wave solitons in the presence of localized inhomogeneities

被引：22
作者：
Herring, G
Kevrekidis, PG
Carretero-González, R
Malomed, BA
Frantzeskakis, DJ
Bishop, AR
机构：
[1] Univ Athens, Dept Phys, Athens 15784, Greece
[2] Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA
[3] San Diego State Univ, Dept Math & Stat, Nonlinear Dynam Syst Grp, San Diego, CA 92182 USA
[4] Tel Aviv Univ, Dept Interdisciplinary Studies, IL-69978 Tel Aviv, Israel
[5] Los Alamos Natl Lab, Ctr Nonlinear Studies, Los Alamos, NM 87545 USA
[6] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA
来源：
PHYSICS LETTERS A | 2005年 / 345卷 / 1-3期
关键词：
D O I：
10.1016/j.physleta.2005.07.008
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We examine the dynamics of a bright solitary wave in the presence of a repulsive or attractive localized "impurity" in Bose-Einstein condensates (BECs). We study the generation and stability of a pair of steady states in the vicinity of the impurity as the impurity strength is varied. These two new steady states, one stable and one unstable, disappear through a saddle-node bifurcation as the strength of the impurity is decreased. Soliton dynamics is also studied, including cases where the soliton is offset from one of the relevant fixed points. The numerical results are corroborated by theoretical calculations which are in very good agreement with the numerical findings. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：144 / 153
页数：10
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