Multi-soliton dynamics in the nonlinear Schrödinger equation

Daomin Cao; Qing Guo; Changjun Zou

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arXiv · 2010.10730

Multi-soliton dynamics in the nonlinear Schrödinger equation

Daomin Cao·Qing Guo·Changjun Zou

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Abstract

In this paper, we study the Cauchy problem of the nonlinear Schrödinger equation with a nontrival potential $V_\varepsilon(x)$. In particular, we consider the case where the initial data is close to a superposition of $k$ solitons with prescribed phase and location, and investigate the evolution of the Schrödinger system. We prove that over a large time interval with the maximum time tending to infinity, all $k$ solitons will maintain the shape, and the solitons dynamics can be regarded as an approximation of $k$ particles moving in $\mathbb{R}^N$ with their accelerations dominated by $\nabla V_\varepsilon$, provided the barycenters of these solitons do not coincide.

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Daomin Cao, Qing Guo, Changjun Zou. 2020-11-24. Multi-soliton dynamics in the nonlinear Schrödinger equation. https://arxiv.org/abs/2010.10730

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