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arXiv 1908.01497nlin.PS
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非线性离散系统导论:理论与建模

Introduction to nonlinear discrete systems: Theory and modeling

E. N. Tsoy, B. A. Umarov

摘要:

离散系统的分析对于理解各种物理过程是重要的,例如晶格和分子链中的激发,波导阵列中的光传播以及玻色凝聚液滴的动力学。在基础物理课程中,通常研究离散系统的线性性质。在本文中,我们提出了一个教学介绍非线性分布式系统的理论。的主要思想和方法,说明使用不同的物理应用程序的通用模型,离散非线性薛定谔(DNLS)方程。我们考虑DNLS方程的解,并分析其线性稳定性。介绍了非线性平面波、调制不稳定性、离散孤子和反连续极限的概念,并对其进行了深入的讨论。为了更好地理解结果和进一步的探索,提供了一个Mathematica程序。同时,也给出了几个独立求解的问题,扩展了本文的主题.

英文摘要:

An analysis of discrete systems is important for understanding of various physical processes, such as excitations in crystal lattices and molecular chains, the light propagation in waveguide arrays, and the dynamics of Bose-condensate droplets. In basic physical courses, usually linear properties of discrete systems are studied. In this paper we propose a pedagogical introduction to the theory of nonlinear distributed systems. The main ideas and methods are illustrated using a universal model for different physical applications, the discrete nonlinear Schrödinger (DNLS) equation. We consider solutions of the DNLS equation and analyze their linear stability. The notions of nonlinear plane waves, modulational instability, discrete solitons and the anti-continuum limit are introduced and thoroughly discussed. A Mathematica program is provided for better comprehension of results and further exploration. Also, few problems, extending the topic of the paper, for independent solution are given.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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