Nonlinear self-dual network equations: modulation instability, interactions of higher-order discrete vector rational solitons and dynamical behaviours

Nonlinear self-dual network equations: modulation instability, interactions of higher-order discrete vector rational solitons and dynamical behaviours
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非线性自对偶网络方程:调制不稳定性、高阶离散向量有理孤子的相互作用和动力学行为

DOI:
10.1098/rspa.2020.0512
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发表时间:
2020-10
期刊:
Proc. R. Soc. A
影响因子:
--
通讯作者:
G. Zhang
G. Zhang
中科院分区:
其他
文献类型:
--
作者:
X. Wen;Z. Yan;G. Zhang

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研究了描述电信号在非线性LC自对偶电路中传播的非线性自对偶网络方程。我们首先分析了恒幅波的调制不稳定性。其次,利用泰勒展开和参数极限法,提出了一种新的广义摄动(M,N − M)-折叠达布变换(DT)。第三,利用所得到的扰动(1,N − 1)重dT,求出其新的行列式形式的高阶有理孤子。这些高阶RS在双曲函数方面不同于已知的结果。详细地展示了一阶、二阶、三阶和四阶RSS丰富的波结构。对它们的动力学行为和稳定性进行了数值模拟。这些结果可能对理解电信号的波传播是有用的。
The nonlinear self-dual network equations that describe the propagations of electrical signals in nonlinear LC self-dual circuits are explored. We firstly analyse the modulation instability of the constant amplitude waves. Secondly, a novel generalized perturbation (M, N − M)-fold Darboux transform (DT) is proposed for the lattice system by means of the Taylor expansion and a parameter limit procedure. Thirdly, the obtained perturbation (1, N − 1)-fold DT is used to find its new higher-order rational solitons (RSs) in terms of determinants. These higher-order RSs differ from those known results in terms of hyperbolic functions. The abundant wave structures of the first-, second-, third- and fourth-order RSs are exhibited in detail. Their dynamical behaviours and stabilities are numerically simulated. These results may be useful for understanding the wave propagations of electrical signals.
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