arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1103.4802nlin.PS
收藏

非线性系统中的非对称波传播

Asymmetric Wave Propagation in Nonlinear Systems

Stefano Lepri, Giulio Casati

摘要:

提出了一种非对称(非互易)波传输的机制。作为一个参考系,我们考虑一个分层的非线性,非镜像对称模型所描述的一维离散非线性Schreodinger方程的空间变化系数嵌入在一个否则线性晶格。我们构造了一类精确扩展解,使得具有相同频率和入射振幅的波从左右方向撞击时具有非常不同的透射系数。这种效果已经出现了两个非线性层的最简单的情况下,并与非线性共振的移位。增加层数会大大增加解决方案族的复杂性。最后,数值模拟的非对称波包传输,漂亮地显示整流效果。

英文摘要:

A mechanism for asymmetric (nonreciprocal) wave transmission is presented. As a reference system, we consider a layered nonlinear, non mirror-symmetric model described by the one-dimensional Discrete Nonlinear Schreodinger equation with spatially varying coefficients embedded in an otherwise linear lattice. We construct a class of exact extended solutions such that waves with the same frequency and incident amplitude impinging from left and right directions have very different transmission coefficients. This effect arises already for the simplest case of two nonlinear layers and is associated with the shift of nonlinear resonances. Increasing the number of layers considerably increases the complexity of the family of solutions. Finally, numerical simulations of asymmetric wavepacket transmission are presented which beautifully display the rectifying effect.

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。

↑