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arXiv 2209.08155nlin.PS
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具有非局部导数的二维非线性薛定谔方程的呼吸子解

Breather Solutions to a Two-dimensional Nonlinear Schrödinger Equation with Non-local Derivatives

Alexander Hrabski, Yulin Pan

摘要:

考虑二维周期区域中具有非局部导数的非线性薛定谔方程.对于某些阶数的导数,我们发现了一种新的呼吸器解决方案,在低的非线性水平上主导场的演化。随着非线性的增加,呼吸子分解,让位于波湍流(或Rayleigh-Jeans)谱。呼吸器解决方案相空间轨迹被发现是接近的线性系统,揭示了呼吸器解决方案和Kolmogorov-Arnold-Moser(KAM)理论之间的连接。

英文摘要:

We consider the nonlinear Schrödinger equation with non-local derivatives in a two-dimensional periodic domain. For certain orders of derivatives, we find a new type of breather solution dominating the field evolution at low nonlinearity levels. With the increase of nonlinearity, the breathers break down, giving way to wave turbulence (or Rayleigh-Jeans) spectra. Phase-space trajectories associated with the breather solutions are found to be close to that of the linear system, revealing a connection between the breather solution and Kolmogorov-Arnold-Moser (KAM) theory.

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