计算物理 ›› 2009, Vol. 26 ›› Issue (5): 693-698.

• 研究论文 • 上一篇    下一篇

广义非线性Schrödinger方程的多辛格式与模方守恒律

黄浪扬   

  1. 华侨大学数学科学学院, 福建 泉州 362021
  • 收稿日期:2007-10-15 修回日期:2008-05-07 出版日期:2009-09-25 发布日期:2009-09-25
  • 作者简介:黄浪扬(1974-),男,福建莆田,讲师,硕士,主要从事偏微分方程数值解法研究.
  • 基金资助:
    福建省自然科学基金(项目编号:Z0511029)资助项目

Multi-symplectic Scheme and Norm Conserving Law of Generalized Nonlinear Schrödinger Equation

HUANG Langyang   

  1. School of Mathematical Sciences, Huaqiao University, Quanzhou 362021, China
  • Received:2007-10-15 Revised:2008-05-07 Online:2009-09-25 Published:2009-09-25

摘要: 通过正则变换,构造出广义非线性Schrödinger方程的多辛方程组.对此多辛方程组,导出了一个新的模方守恒多辛格式.数值实验结果表明,多辛格式具有长时间的数值行为,且在保持模方守恒律方面优于蛙跳格式和辛欧拉中点格式.

关键词: 广义非线性Schrö, dinger方程, 多辛方程组, 守恒律, 多辛格式, 数值实验

Abstract: Multi-symplectic system for generalized nonlinear Schrödinger equation is constructed by canonical transformation.A new norm conserving multi-symplectic scheme is derived.Numerical experiments show that the multi-symplectic scheme shows excellent long-time numerical behavior and preserves norm conserving law better than both leap-frog scheme and symplectic Euler middle scheme.

Key words: generalized nonlinear Schrödinger equation, multi-symplectic system, conservation law, multi-symplectic scheme, numerical experiments

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