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arXiv 0905.0062math.AP
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一维立方NLS和奇异涡旋动力学的散射

Scattering for 1D cubic NLS and singular vortex dynamics

Valeria Banica, Luis Vega

摘要:

本文研究了流体和超流体中涡丝动力学的一种模型--副法线流的自相似解的稳定性。这些特解$χ_a(t,x)$形成一个家庭的发展定期曲线的$\mathbb R^3$,发展一个奇点在有限的时间,索引的参数$a>0$。我们考虑的曲线是$χ_a(t_0,x)$在固定时间$t_0$的小的正则扰动。特别是,它们的曲率在无穷远处不为零,所以我们不是在副法线流的局部存在性的已知结果的背景下。然而,我们在这篇文章中构造的副法线流的解决方案,这些初始数据。此外,这些解决方案也成为奇异的有限时间。我们的方法使用的Hasimoto变换,使我们研究的长时间行为的一维三次NLS方程与时间相关的系数和小的正则扰动的常数解作为初始数据。我们证明了该方程在适当的函数空间中的渐近完备性。

英文摘要:

In this paper we study the stability of the self-similar solutions of the binormal flow, which is a model for the dynamics of vortex filaments in fluids and super-fluids. These particular solutions $χ_a(t,x)$ form a family of evolving regular curves of $\mathbb R^3$ that develop a singularity in finite time, indexed by a parameter $a>0$. We consider curves that are small regular perturbations of $χ_a(t_0,x)$ for a fixed time $t_0$. In particular, their curvature is not vanishing at infinity, so we are not in the context of known results of local existence for the binormal flow. Nevertheless, we construct in this article solutions of the binormal flow with these initial data. Moreover, these solutions become also singular in finite time. Our approach uses the Hasimoto transform what leads us to study the long-time behavior of a 1D cubic NLS equation with time-depending coefficients and small regular perturbations of the constant solution as initial data. We prove asymptotic completeness for this equation in appropriate function spaces.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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