Instability of the solitary waves for the 1d NLS with an attractive delta potential in the degenerate case
Instability of the solitary waves for the 1d NLS with an attractive delta potential in the degenerate case
复制标题
简并情况下具有有吸引力的 delta 势的 1d NLS 孤立波的不稳定性
DOI:
10.4310/mrl.2022.v29.n1.a9
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发表时间:
2019
影响因子:
1
通讯作者:
Guixiang Xu
中科院分区:
文献类型:
--
作者:
Xingdong Tang;Guixiang Xu
In this paper, we show the orbital instability of the solitary waves $Q_{\Omega}e^{i\Omega t}$ of the 1d NLS with an attractive delta potential ($\gamma>0$)
\begin{equation*}
iu_t+u_{xx}+\gamma\delta u+\abs{u}^{p-1}u=0, \; p>5,
\end{equation*} where $\Omega=\Omega(p,\gamma)>\frac{\gamma^2}{4}$ is the critical oscillation number and determined by
\begin{equation*} \frac{p-5}{p-1} \int_{ \arctanh\sts{ \frac{\gamma}{2\sqrt{\Omega}} } }^{+\infty} \sech^{\frac{4}{p-1}}\sts{y}\d y = { \frac{\gamma}{ 2\sqrt{\Omega} } }\sts{ 1-\frac{\gamma^2}{4\Omega} }^{-\frac{p-3}{p-1}} \Longleftrightarrow \mathbf{d}''(\Omega) =0.
\end{equation*} The classical convex method and Grillakis-Shatah-Strauss's stability approach in \cite{A2009Stab, GSS1987JFA1} don't work in this degenerate case, and the argument here is motivated by those in \cite{CP2003CPAM, MM2001GAFA, M2012JFA, MTX2018, O2011JFA}. The main ingredients are to construct the unstable second order approximation near the solitary wave $Q_{\Omega}e^{i\Omega t}$ on the level set $\Mcal(Q_{\Omega})$ accoding to the degenerate structure of the Hamiltonian and to construct the refined Virial identity to show the orbital instability of the solitary waves $Q_{\Omega}e^{i\Omega t}$ in the energy space. Our result is the complement of the results in \cite{FOO2008AIHP} in the degenerate case.
DOI:
--
发表时间:
2023
期刊:
影响因子:
--
作者:
Yasunori Kimura;Katsutoshi Shinohara;Yasunori Kimura;Yasunori Kimura;Yasunori Kimura and Keisuke Shindo;古場一;太田 雅人
通讯作者:
太田 雅人
DOI:
--
发表时间:
2008
期刊:
Annales de 1'Institut Henri Poincar, Analyse Non Lineaire 25
影响因子:
--
作者:
Reika Fukuizumi;Masahito Ohta;Tohru Ozawa
通讯作者:
Tohru Ozawa