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从微观角度上讲, 单个极端异常波事件可视为可积模型方程的时空局域有理函数解. 本文主要讨论了三类典型的可积谐振相互作用模型(即长波短波谐振方程, 三波谐振相互作用方程, 非线性薛定谔和麦克斯韦-布洛赫方程)的基阶Peregrine异常波解及其相关研究进展; 明确指出了这些基阶异常波解形式具有普适性, 可推广应用到多分量或更高阶的可积模型中; 借助数值模拟, 还展示了共存异常波、互补异常波、以及自感应透明Peregrine孤子等新颖动力学.
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关键词:
- 异常波/
- 长波短波谐振/
- 三波谐振相互作用/
- 麦克斯韦–布洛赫方程
From a microscopic perspective, the single extreme rogue wave event can be thought of as the spatiotemporally localized rational solutions of the underlying integrable model. A typical example is the fundamental Peregrine rogue wave, who in general entails a three-fold peak amplitude, while making its peak position arbitrary on a finite continuous-wave background. This kind of bizarre wave structure agrees well with the fleeting nature of realistic rogue waves and has been confirmed experimentally, first in nonlinear fibers, then in water wave tanks and plasmas, and recently in an irregular oceanic sea state. In this review, with a brief overview of the current state of the art of the concepts, methods, and research trends related to rogue wave events, we mainly discuss the fundamental Peregrine rogue wave solutions as well as their recent progress, intended for three typical integrable models, namely, the long-wave short-wave resonant equation, the three-wave resonant interaction equation, and the nonlinear Schrödinger and Maxwell–Bloch equation. Basically, while the first two models can describe the resonant interaction among optical waves, the latter governs the interaction between the optical waves and the resonant medium. For each integrable model, we present explicitly its Lax pair, Darboux transformation formulas, and fundamental Peregrine rogue wave solutions, in a self-consistent way. We confirm by convincing examples that these fundamental rogue wave solutions exhibit universality and can be applied to the multi-component or the higher-order versions of the current integrable models. By means of numerical simulations, we demonstrate as well several novel rogue wave dynamics such as coexisting rogue waves, complementary rogue waves, and Peregrine solitons of self-induced transparency.-
Keywords:
- rogue wave/
- long-wave short-wave resonance/
- three-wave resonant interaction/
- Maxwell–Bloch equation
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