在不规则海况条件下跟踪呼吸器动力学
Tracking breather dynamics in irregular sea state conditions
摘要：
非线性薛定谔方程（NLSE）的呼吸子解被认为是海洋和克尔介质中极端事件的骨干模型。这些精确的determinisitic流氓波（RW）的原型在一个规则的背景下描述了广泛的调制不稳定性配置。或者，海洋或电磁波场可以具有混沌性质，并且已知RW也可以在这样的条件下发展。我们报告了一项实验研究，证实了在一个不规则的海洋JONSWAP波场的极端本地化可以追溯到起源于确切的NLSE呼吸器解决方案，如游隼呼吸器。数值NLSE以及修改后的NLSE模拟都与实验室实验吻合良好，突出了普遍的弱非线性演化方程的出现，以及在非线性色散介质中的极端事件的预测的意义。
英文摘要：
Breather solutions of the nonlinear Schrödinger equation (NLSE) are known to be considered as backbone models for extreme events in the ocean as well as in Kerr media. These exact determinisitic rogue wave (RW) prototypes on a regular background describe a wide-range of modulation instability configurations. Alternatively, oceanic or electromagnetic wave fields can be of chaotic nature and it is known that RWs may develop in such conditions as well. We report an experimental study confirming that extreme localizations in an irregular oceanic JONSWAP wave field can be tracked back to originate from exact NLSE breather solutions, such as the Peregrine breather. Numerical NLSE as well as modified NLSE simulations are both in good agreement with laboratory experiments and highlight the significance of universal weakly nonlinear evolution equations in the emergence as well as prediction of extreme events in nonlinear dispersive media.
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