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arXiv 2603.24906math.AP
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分数NLS方程在\T^d上解的Sobolev范数的多项式增长

Polynomial growth of Sobolev norms of solutions of the fractional NLS equation on $\mathbb{T}^d$

Jiajun Wang

AI总结:

本文证明了分数非线性Schrödinger方程在\T^d上解的Sobolev范数的多项式增长界,通过建立分数Schrödinger方程在\T^d上的Strichartz估计来克服高维中的非均匀性问题。

摘要:

在本文中,我们证明了分数非线性Schrödinger方程在\T^d(d≥2)上解的Sobolev范数的多项式增长界,该结果扩展了Joseph Thirouin在\T上的结果[Thi17]。关键的组成部分是建立了分数Schrödinger方程在\T^d上的Strichartz估计。为此,我们利用振荡积分的统一估计来克服高维中出现的非均匀性问题。

英文摘要:

We study polynomial growth of Sobolev norms for the defocusing fractional nonlinear Schrödinger equation on the standard torus $\mathbb{T}^d$, $d \ge 2$. Uniform stationary phase and a frequency-dependent subdivision of time give Strichartz estimates which yield local well-posedness and, for the cubic equation, unconditional polynomial growth when $α> d^2/(d+2)$. The local theory and growth estimates extend to every integer-power nonlinearity $|u|^{2σ}u$, with explicit thresholds and growth exponents. In the final section, we identify a further approach to improving the polynomial growth bounds. By combining our arguments with the circle method, we obtain stronger Strichartz estimates, which yield local well-posedness at lower regularity and improved polynomial growth bounds.

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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