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arXiv 2007.10959nlin.SImath-phmath.MP
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绝热近似下Manakov $N$孤子串的渐近动力学态

On Asymptotic Dynamical Regimes of Manakov $N$-soliton Trains in Adiabatic Approximation

Vladimir S. Gerdjikov, Michail D. Todorov

摘要:

我们在绝热近似下分析了Manakov模型中$N$孤子训练的动力学行为.受增益/损失效应以及几种类型的外部电位的干扰。Manakov $N$ -孤子串的演化由复Toda链(CTC)这一完全可积的动力学模型描述。通过计算其Lax矩阵的特征值,我们可以确定每个孤子的渐近速度。因此,我们描述的孤子参数,确保两种主要类型的渐近制度之一:束缚态制度(BSR)和自由渐近制度(FAR)。特别是,我们发现明确的描述,确保BSR和FAR的特殊对称配置的$N$孤子。我们发现CTC预测的孤子的轨迹与Manakov系统的孤子参数的宽类的数值计算之间的匹配。这证明了我们模型的有效性。

英文摘要:

We analyze the dynamical behavior of the $N$-soliton train in the adiabatic approximation of the Manakov model. %perturbed by gain/loss effects and also by several types of external potentials. The evolution of Manakov $N$-soliton trains is described by the complex Toda chain (CTC) which is a completely integrable dynamical model. Calculating the eigenvalues of its Lax matrix allows us to determine the asymptotic velocity of each soliton. So we describe sets of soliton parameters that ensure one of the two main types of asymptotic regimes: the bound state regime (BSR) and the free asymptotic regime (FAR). In particular we find explicit description of special symmetric configurations of $N$ solitons that ensure BSR and FAR. We find excellent matches between the trajectories of the solitons predicted by CTC with the ones calculated numerically from the Manakov system for wide classes of soliton parameters. This confirms the validity of our model.

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