arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.12378math.AP
收藏

与薛定谔映射和副正规流相关的能量密度的无界增长

Unbounded growth of the energy density associated to the Schrödinger map and the binormal flow

Valeria Banica, Luis Vega

摘要:

我们考虑的副法线流动方程,这是一个模型的动态的涡丝在欧拉方程。从几何上讲,它是三维曲线流,明确地连接到一维薛定谔映射(其值在二维球面上)和一维立方薛定谔方程。虽然这些方程是完全可积的,但我们证明了能量密度的无限增长的存在性。密度由曲线的切向量的导数的高频的振幅给出,从而给出小尺度下的振荡的信息。在涡丝的设置中,切向量的变化与涡度方向的导数有关,根据Constantin-February man-Majda准则,这在欧拉方程奇点的可能发展中起着相关的作用。

英文摘要:

We consider the binormal flow equation, which is a model for the dynamics of vortex filaments in Euler equations. Geometrically it is a flow of curves in three dimensions, explicitly connected to the 1-D Schrödinger map with values on the 2-D sphere, and to the 1-D cubic Schrödinger equation. Although these equations are completely integrable we show the existence of an unbounded growth of the energy density. The density is given by the amplitude of the high frequencies of the derivative of the tangent vectors of the curves, thus giving information of the oscillation at small scales. In the setting of vortex filaments the variation of the tangent vectors is related to the derivative of the direction of the vorticity, that according to the Constantin-Fefferman-Majda criterion plays a relevant role in the possible development of singularities for Euler equations.

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。

↑