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arXiv 2407.19971math.AP
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能量临界Zakharov系统的有限时间爆破I:近似解

Finite time blow up for the energy critical Zakharov system I: approximate solutions

Joachim Krieger, Tobias Schmid

AI总结:

本文构造了临界4D Zakharov系统在有限时间内坍缩至孤立子体解奇异重整化的近似解,其构造方法基于匹配渐近区域与近似程序。

摘要:

我们构造了临界4D Zakharov系统的近似解 $(ψ_*, n_*)$,该解在有限时间内坍缩至孤立子体解 $(λe^{i θ}W, λ^2 W^2)$ 的奇异重整化。确切地说,对于 $N \in \mathbb{Z}_+,\\;N \gg1$,我们得到如下形式的磁包络/离子密度对:$$ ψ_*(t, x)= e^{iα(t)}λ(t) W(λ(t)x) + η(t, x), \\;n_*(t,x) = λ^2(t) W^2(λ(t) x) + χ(t,x), $$ 其中 $ W(x) = (1 + \frac{|x|^2}{8})^{-1}$,$α(t) = α_0 \log(t)$,$λ(t)= t^{-\frac{1}{2}-ν}$(其中 $ν> 1$ 较大),并且当 $ t \to 0^+$ 时,在适当意义下有 $$ i \partial_t ψ_* + Δψ_* + n_* ψ_* = \mathcal{O}(t^N),\\; \Box n_* - Δ(|ψ_*|^2) = \mathcal{O}(t^N),\\;\\;η(t) \to η_0, χ(t) \to χ_0, $$。该构造方法受启发于第一作者与W. Schlag和D. Tataru共同引入的爆破解背景下匹配渐近区域和近似程序,以及G. Perelman等人在Schrödinger背景下后续发展的方法。

英文摘要:

We construct approximate solutions $ (ψ_*, n_*)$ of the critical 4D Zakharov system which collapse in finite time to a singular renormalization of the solitary bulk solutions $ (λe^{i θ}W, λ^2 W^2)$ . To be precise for $ N \in \mathbb{Z}_+,\;N \gg1 $ we obtain a magnetic envelope/ion density pair of the form $$ ψ_*(t, x)= e^{iα(t)}λ(t) W(λ(t)x) + η(t, x), \;n_*(t,x) = λ^2(t) W^2(λ(t) x) + χ(t,x), $$ where $ W(x) = (1 + \frac{|x|^2}{8})^{-1}$, $α(t) = α_0 \log(t)$, $λ(t)= t^{-\frac{1}{2}-ν}$ with large $ν> 1 $ and further $$ i \partial_t ψ_* + Δψ_* + n_* ψ_* = \mathcal{O}(t^N),\; \Box n_* - Δ(|ψ_*|^2) = \mathcal{O}(t^N),\;\;η(t) \to η_0, χ(t) \to χ_0, $$ as $ t \to 0^+$ in a suitable sense. The method of construction is inspired by matched asymptotic regions and approximation procedures in the context of blow up solutions introduced by the first author jointly with W. Schlag and D. Tataru, as well as the subsequently developed methods in the Schrödinger context by G. Perelman et al.

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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