Rogue wave formation and interactions in the defocusing nonlinear Schrödinger equation with external potentials

Rogue wave formation and interactions in the defocusing nonlinear Schrödinger equation with external potentials
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散焦非线性薛定谔方程中的异常波形成和与外部电势的相互作用

DOI:
10.1016/j.aml.2020.106670
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发表时间:
2020-12
影响因子:
3.7
通讯作者:
Zhenya Yan
Zhenya Yan
中科院分区:
数学2区
文献类型:
--
作者:
Li Wang;Zhenya Yan

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散焦非线性薛定谔(NLS)方程不存在调制不稳定性,到目前为止还没有发现RW现象。在本文中,我们首先研究了具有实值含时势和含时势的散焦NLS方程中的一些新的非线性波结构,从而分别发现了稳定的新RWS孤子和W型孤子。此外,还探讨了两个或三个RW之间的相互作用,使得在具有实值含时势的散焦NLS方程中产生了较高幅度的RW。最后,我们研究了具有复PT对称势的散焦NLS方程,发现了一些RWS孤子和W型孤子。这些新颖的结果将有助于设计相关的物理实验,在离焦非线性相互作用的情况下产生RW现象和W形孤子,并将它们应用于非线性甚至线性科学的相关领域。
The defocusing nonlinear Schrödinger (NLS) equation has no the modulational instability, and was not found to possess the rogue wave (RW) phenomenon up to now. In this paper, we firstly investigate some novel nonlinear wave structures in the defocusing NLS equation with real-valued time-dependent and time-independent potentials such that the stable new RWs and W-shaped solitons are found, respectively. Moreover, the interactions of two or three RWs are explored such that the RWs with higher amplitudes are generated in the defocusing NLS equation with real-valued time-dependent potentials. Finally, we study the defocusing NLS equation with complex PT-symmetric potentials such that some RWs and W-shaped solitons are also found. These novel results will be useful to design the related physical experiments to generate the RW phenomena and W-shaped solitons in the case of defocusing nonlinear interactions, and to apply them in the related fields of nonlinear or even linear sciences.
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