arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2003.09397math.APmath-phmath.DSmath.MPnlin.PSnlin.SI
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花图上的驻波

Standing waves on a flower graph

Adilbek Kairzhan, Robert Marangell, Dmitry E. Pelinovsky, Ke Liang Xiao

摘要:

一个花图由一条射线和在一个顶点上与$N \geq 2$相连的$N$对称环组成(如果$N = 1$,则称为蝌蚪图)。在三次非线性薛定谔方程的框架下,我们考虑了花图上的正单瓣态。我们的论文的主要新颖之处是严格的应用程序的周期函数的二阶微分方程对理解的对称性和分支的驻波度量图。我们发现,正的单瓣对称态(这是小的固定质量的能量基态)经历了一个分岔较大的质量,在这一点$(N-1)$分支的其他正的单瓣状态出现:每个分支有$K$较大的组件和$(N-K)$较小的组件,其中$1 \leq K \leq N-1$。结果表明,对于大的固定质量,只有含$K = 1$的分支代表能量的局部极小,而对于大的固定质量,基态能量不能达到。从周期函数得到的分析结果进行了数值说明。

英文摘要:

A flower graph consists of a half line and $N$ symmetric loops connected at a single vertex with $N \geq 2$ (it is called the tadpole graph if $N = 1$). We consider positive single-lobe states on the flower graph in the framework of the cubic nonlinear Schrodinger equation. The main novelty of our paper is a rigorous application of the period function for second-order differential equations towards understanding the symmetries and bifurcations of standing waves on metric graphs. We show that the positive single-lobe symmetric state (which is the ground state of energy for small fixed mass) undergoes exactly one bifurcation for larger mass, at which point $(N-1)$ branches of other positive single-lobe states appear: each branch has $K$ larger components and $(N-K)$ smaller components, where $1 \leq K \leq N-1$. We show that only the branch with $K = 1$ represents a local minimizer of energy for large fixed mass, however, the ground state of energy is not attained for large fixed mass. Analytical results obtained from the period function are illustrated numerically.

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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