Slowly moving matter-wave gap soliton propagation in weak random optical lattices

被引：0
作者：
M. R. Zhang
X. Y. Jiang
Y. L. Zhang
L. Shi
J. Zi
J. Y. Zhou
机构：
[1] Surface Physics Laboratory (National Key Lab),
[2] Fudan University,undefined
[3] Institute of Microsystem and Information Technology,undefined
[4] State Key Laboratory of Optoelectronic Materials and Technologies,undefined
[5] Zhongshan University,undefined
来源：
The European Physical Journal B | 2007年 / 58卷
关键词：
03.75.Lm Tunneling, Josephson effect, Bose-Einstein condensates in periodic potentials, solitons, vortices, and topological excitations; 42.65.Tg Optical solitons; nonlinear guided waves; 05.45.Yv Solitons;
D O I：
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学科分类号：
摘要：
We systematically investigate slowly moving matter-wave gap soliton propagation in weak random optical lattices. With the weak randomness, an effective-particle theory is constructed to show that the motion of a gap soliton is similar to a particle moving in random potentials. Based on the effective-particle theory, the effects of the randomness on gap solitons are obtained and the trajectories of gap solitons are well predicted. Moreover, the general laws that describe the movement depending on the weak randomness are obtained. We find that with an increase of the random strength, the ensemble-average velocity reduces slowly and the reflection probability becomes larger. The theoretical results based on the effective-particle theory are confirmed by the numerical simulations based on the Gross-Pitaevskii equation.
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页码：269 / 278
页数：9
相关论文
共 23 条
  • [1] Minguzzi undefined(2004)undefined Phys. Rep. 395 223-undefined
  • [2] Morsch undefined(2006)undefined Rev. Mod. Phys. 78 179-undefined
  • [3] Morsch undefined(2001)undefined Phys. Rev. Lett. 87 140402-undefined
  • [4] Cristiani undefined(2002)undefined Phys. Rev. A 65 063612-undefined
  • [5] Fallani undefined(2005)undefined Phys. Rev. Lett. 91 240405-undefined
  • [6] Eiermann undefined(2004)undefined Phys. Rev. Lett. 92 230401-undefined
  • [7] Chen undefined(1987)undefined Phys. Rev. Lett. 58 160-undefined
  • [8] Broderick undefined(1995)undefined Phys. Rev. E 51 4978-undefined
  • [9] Aceves undefined(1989)undefined Phys. Lett. A 141 37-undefined
  • [10] Feng undefined(1993)undefined IEEE J. Quantum Electron. 29 590-undefined
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