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arXiv 2102.11523nlin.PSnlin.SI
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五阶非线性薛定谔方程中周期背景上的异常波的形成

Formation of rogue waves on the periodic background in a fifth-order nonlinear Schrödinger equation

N. Sinthuja, K. Manikandan, M. Senthilvelan

摘要:

在雅可比椭圆函数背景下构造了五阶非线性薛定谔方程的流氓波解。结合达布变换和谱问题的非线性化,得到了两种不同周期波背景下的流氓波解。我们分析了不同的系统参数值所获得的解决方案,并指出我们的结果的某些新的功能。通过谱稳定性问题计算了系统的$dn$和$cn$周期背景波的不稳定性增长率。我们发现,不稳定增长率减少(增加)$dn$ - $(cn)$周期波时,我们改变椭圆模量参数的值。

英文摘要:

We construct rogue wave solutions of a fifth-order nonlinear Schrödinger equation on the Jacobian elliptic function background. By combining Darboux transformation and the nonlinearization of spectral problem, we generate rogue wave solution on two different periodic wave backgrounds. We analyze the obtained solutions for different values of system parameter and point out certain novel features of our results. We also compute instability growth rate of both $dn$ and $cn$ periodic background waves for the considered system through spectral stability problem. We show that instability growth rate decreases (increases) for $dn$-$(cn)$ periodic waves when we vary the value of the elliptic modulus parameter.

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