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arXiv 1607.04520math.AP
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有界区域上非线性Schrodinger方程的归一化束缚态

Normalized bound states for the nonlinear Schrodinger equation in bounded domains

Dario Pierotti, Gianmaria Verzini

摘要:

给定$ρ>0$,研究椭圆型问题\[ \text{find } (U,λ)\in H^1_0(Ω)\times \mathbb{R} \text{ such that } \begin{cases} -ΔU+λU=|U|^{p-1}U \int_Ω U^2\, dx=ρ, \end{cases} \],其中$Ω\subset\mathbb{R}^N$是有界区域,$p>1$是Sobolev-次临界的,寻找解存在的条件(关于$ρ$,$N$和$p$).由Gagliardo-Nirenberg不等式可以得出,当$p$是$L^2$ -次临界的,即$1<p\leq1+4/N$时,问题对于每个$ρ>0$都有解。在$L^2$ -临界和超临界的情况下,即当$1+4/N \leq p < 2^*-1$,我们表明,对于任何$k\in\mathbb{N}$,问题承认的解决方案具有莫尔斯指数以上的$k$有界,只有当$ρ$是足够小的。接下来,我们提供了$ρ$的某些范围的存在性结果,这些结果可以根据$H^1_0(Ω)$中$-Δ$的Dirichlet特征值进行估计,扩展到一般区域和变号解[Noris,Tavares,Verzini,Analysis & PDE,2014]中获得的球中正解的一些结果。

英文摘要:

Given $ρ>0$, we study the elliptic problem \[ \text{find } (U,λ)\in H^1_0(Ω)\times \mathbb{R} \text{ such that } \begin{cases} -ΔU+λU=|U|^{p-1}U \int_Ω U^2\, dx=ρ, \end{cases} \] where $Ω\subset\mathbb{R}^N$ is a bounded domain and $p>1$ is Sobolev-subcritical, searching for conditions (about $ρ$, $N$ and $p$) for the existence of solutions. By the Gagliardo-Nirenberg inequality it follows that, when $p$ is $L^2$-subcritical, i.e. $1<p\leq1+4/N$, the problem admits solution for every $ρ>0$. In the $L^2$-critical and supercritical case, i.e. when $1+4/N \leq p < 2^*-1$, we show that, for any $k\in\mathbb{N}$, the problem admits solutions having Morse index bounded above by $k$ only if $ρ$ is sufficiently small. Next we provide existence results for certain ranges of $ρ$, which can be estimated in terms of the Dirichlet eigenvalues of $-Δ$ in $H^1_0(Ω)$, extending to general domains and to changing sign solutions some results obtained in [Noris, Tavares, Verzini, Analysis & PDE, 2014] for positive solutions in the ball.

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