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arXiv 1601.07029nlin.PSmath-phmath.MPnlin.SI
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AB系统中的平稳非线性波、叠加模态和调制不稳定性特征

Stationary nonlinear waves, superposition modes and modulational instability characteristics in the AB system

Lei Wang, Zi-Qi Wang, Jian-Hui Zhang, Feng-Hua Qi, Min Li

摘要:

我们研究了地球物理流体中描述边缘不稳定斜压波包的AB系统和非线性光学中描述超短脉冲的AB系统。研究表明,在恒定背景下,呼吸子可以转化为不同类型的稳态非线性波,包括多峰孤子、M型孤子、W型孤子和周期波.我们还研究了这些波之间的非线性相互作用,由于孤子的非传播特性,这些波显示出一些新的模式:(1)两个反暗孤子可以产生一个W形孤子而不是一个高阶反暗孤子;(2)反暗孤子与W形孤子相互作用不仅可以产生高阶反暗孤子,而且可以形成一个W形孤子对,(3)振荡W型孤子与振荡M型孤子之间的相互作用呈现多峰结构。我们发现这种转变发生在低扰动频率区域的调制稳定区域。

英文摘要:

We study the AB system describing marginally unstable baroclinic wave packets in geophysical fluids and also ultra-short pulses in nonlinear optics. We show that the breather can be converted into different types of stationary nonlinear waves on constant backgrounds, including the multi-peak soliton, M-shaped soliton, W-shaped soliton and periodic wave. We also investigate the nonlinear interactions between these waves, which display some novel patterns due to the non-propagating characteristics of the solitons: (1) Two antidark solitons can produce a W-shaped soliton instead of a higher-order antidark one, (2) The interaction between an antidark soliton and a W-shaped soliton can not only generate a higher-order antidark soliton, but also form a W-shaped solion pair, (3) The interactions between an oscillation W-shaped soliton and an oscillation M-shaped soliton show the multipeak structures. We find that the transition occurs at a modulational stability region in a low perturbation frequency region.

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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