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arXiv 0907.0523math.AP
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次临界幂非线性薛定谔方程的寿命

On the life span of the Schrödinger equation with sub-critical power nonlinearity

Hironobu Sasaki

摘要:

本文讨论了一维薛定谔方程的Cauchy问题的生存期,该方程具有单次幂非线性项$λ|u|^{p-1}u$($λ\in\mathbb{C}$,$2\le p<3$),初值为$\varepsilonφ$ .这里,$\varepsilon$代表数据的大小。不难看出,如果$\varepsilon$足够小,则寿命$T(\varepsilon)$由下面的$C_0 \varepsilon^{-2(p-1)/(3-p)}$估计。本文考虑了$T(\varepsilon)$的一个更精确的估计,证明了$\liminf_{\varepsilon\to 0}\varepsilon^{2(p-1)/(3-p)}T(\varepsilon)$大于仅由$p$,$\mathrm{Im}λ$和$φ$表示的某个正常数.

英文摘要:

We discuss the life span of the Cauchy problem for the one-dimensional Schrödinger equation with a single power nonlinearity $λ|u|^{p-1}u$ ($λ\in\mathbb{C}$, $2\le p<3$) prescribed an initial data of the form $\varepsilonφ$. Here, $\varepsilon$ stands for the size of the data. It is not difficult to see that the life span $T(\varepsilon)$ is estimated by $C_0 \varepsilon^{-2(p-1)/(3-p)}$ from below, provided $\varepsilon$ is sufficiently small. In this paper, we consider a more precise estimate for $T(\varepsilon)$ and we prove that $\liminf_{\varepsilon\to 0}\varepsilon^{2(p-1)/(3-p)}T(\varepsilon)$ is larger than some positive constant expressed only by $p$, $\mathrm{Im}λ$ and $φ$.

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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