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arXiv 2106.05413nlin.PS
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色散依赖于强度的孤立波:变分表征

Solitary waves with intensity-dependent dispersion: variational characterization

D. E. Pelinovsky, R. M. Ross, P. G. Kevrekidis

摘要:

在一个色散依赖于强度的原型系统中存在连续的奇异孤波族。该族以尖形孤子为极限最低能态,由具有不同长度钟形头部的孤立波组成。我们表明,这个家庭可以得到变分在固定的能量和固定长度的钟形头的质量最小化。我们开发了一个弱的制定的奇异孤立波,并证明了它们是稳定的扰动下,不改变的长度的钟形头。数值模拟证实了奇异孤立波的稳定性。

英文摘要:

A continuous family of singular solitary waves exists in a prototypical system with intensity-dependent dispersion. The family has a cusped soliton as the limiting lowest energy state and is formed by the solitary waves with bell-shaped heads of different lengths. We show that this family can be obtained variationally by minimization of mass at fixed energy and fixed length of the bell-shaped head. We develop a weak formulation for the singular solitary waves and prove that they are stable under perturbations which do not change the length of the bell-shaped head. Numerical simulations confirm the stability of the singular solitary waves.

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