系统参数对线性耦合物质波孤子演化的影响

J4 ›› 2012, Vol. 29 ›› Issue (3): 344-348.

系统参数对线性耦合物质波孤子演化的影响

刘飞^1,2,易林¹

1华中科技大学物理学院，湖北武汉 430074；
2湖北师范学院物理系，湖北黄石 435002

收稿日期:2011-04-19 修回日期:2011-06-10 出版日期:2012-05-28 发布日期:2012-05-22
通讯作者: 易林（1963-），教授，博士生导师。研究方向为凝聚态物理和光学。 E-mail:yilin@mail.hust.edu.cn.
作者简介:刘飞（1977-），湖北宜昌人，讲师，博士生，研究方向为凝聚态物理和光学。E-mail: wlxliufei@sina.com
基金资助:
湖北省教育厅项目（D200722003, Z200722001）和湖北师范学院青年基金（2010C23）资助

Effect of parameters on evolution of the linearly coupling matter-wave solitons

LIU Fei^1,2, YI Lin¹

1 Schoolt of Physics，Huazhong University of Science and Technology，Wuhan 430074，China；
2 Department of Physics，Hubei Nomal University，Huangshi 435002， China

Received:2011-04-19 Revised:2011-06-10 Published:2012-05-28 Online:2012-05-22

摘要/Abstract

摘要：

运用分步傅里叶方法数值解耦合Gross-Pitaevskii方程，研究了具有局部畸变的光格势阱中两个线性耦合的玻色–爱因斯坦凝聚孤子的动力学特性。结果表明，势阱的局部畸变强度和线性耦合系数的大小对两个耦合物质波孤子的交换和自陷效应有重要影响，线性耦合系数的增加，物质波孤子间的相互作用从自陷过渡到Josephson振荡。当势阱的局部畸变强度为一些特殊值时，势阱的局部畸变对物质波孤子的演化影响甚微。

关键词: 量子光学, 分步傅里叶方法, 物质波孤子, 系统参数, 线性耦合

Abstract:

The dynamical characteristics of two linearly coupling solitons with a localized impurity in Bose-Einstein condensates are investigated by direct numerical simulations of the Gross-Pitaevskii equation with split-step Fourier method. It is found that the evolution of solitons depends on the impurity strength and the linearly coupling parameters of the system, and there exist exchange, self-trapping and Josephson oscillator with the increasing of linearly coupling parameters. The effect of the impurity strength of potential well on the evolution of solitons is little when some given values are taken.

Key words: quantum optics, split-step Fourier method, matter-wave soliton, parameters of the system, linearly coupling

中图分类号:

O431.2

刘飞易林. 系统参数对线性耦合物质波孤子演化的影响[J]. J4, 2012, 29(3): 344-348.

LIU Fei, YI Lin . Effect of parameters on evolution of the linearly coupling matter-wave solitons[J]. J4, 2012, 29(3): 344-348.

参考文献

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