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arXiv 2301.06288math.APmath.CAmath.CV
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分数色散波的传播速度

Speed of propagation of fractional dispersive waves

Southern Methodist University(南方卫理公会大学);Los Alamos National Laboratory(洛斯阿拉莫斯国家实验室)

Brian Choi, Steven Walton

AI总结:

本文研究了分数阶色散方程中非平凡解的传播速度,证明了色散关系必须允许解析延拓,并探讨了记忆效应对波传播的影响。

摘要:

在本文中,我们证明了广泛非线性色散方程的所有非平凡解,其线性演化由在最小正则性假设下由色散关系支配,不能在任何非平凡时间区间内保持紧支撑。我们的方法基于复分析论证和Paley-Wiener-Schwartz定理,得出更强的结果:如果线性解在两个不同的时间点上保持紧支撑,则色散关系必须允许解析延拓。这一结果扩展了以前的结果,超越了多项式色散关系,并应用于更一般的设置,包括分数阶系统。作为应用,我们研究了广义的时空分数阶薛定谔方程,展示了记忆效应在波传播中的作用。

英文摘要:

In this paper, we show that all non-trivial solutions of a broad class of nonlinear dispersive equations, whose linear evolution is governed by a dispersion relation under minimal regularity assumptions, cannot remain compactly supported for any non-trivial time interval. Our approach, based on complex-analytic arguments and the Paley-Wiener-Schwartz theorem, yields a stronger result: if linear solutions are compactly supported at two distinct times, then the dispersion relation must admit an analytic extension. This extends previous results beyond polynomial dispersion relations and applies to more general settings, including fractional-order systems. As an application, we examine the generalized space-time fractional Schrödinger equation, illustrating the role of memory effects in wave propagation.

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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