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arXiv 1209.0522math-phmath.MP
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关于离散薛定谔算子谱的注记

Note on the spectrum of discrete Schrödinger operators

Fumio Hiroshima, Itaru Sasaki, Tomoyuki Shirai, Akito Suzuki

摘要:

研究了离散Schr dinger算子$L+V$在$d$维格点上的谱,其中$L$表示离散Laplacian,$V$表示在单点有质量的δ函数.给出了$L+V$的特征值,证明了其不存在奇异连续谱.特别是,它示出了嵌入的本征值不出现$d\geq5$,但不为$1\leq d\leq 4$。

英文摘要:

The spectrum of discrete Schrödinger operator $L+V$ on the $d$-dimensional lattice is considered, where $L$ denotes the discrete Laplacian and $V$ a delta function with mass at a single point. Eigenvalues of $L+V$ are specified and the absence of singular continuous spectrum is proven. In particular it is shown that an embedded eigenvalue does appear for $d\geq5$ but does not for $1\leq d\leq 4$.

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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