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arXiv math-ph/0409074math-phmath.MPmath.SP
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具有少量束缚态的Schroedinger算子

Schroedinger Operators With Few Bound States

David Damanik, Rowan Killip, Barry Simon

摘要:

我们证明了具有多个束缚态的全线薛定谔算符没有嵌入奇异谱。与此相反,我们表明,嵌入奇异谱是可能的,即使在束缚态的本质谱指数快速接近。我们还证明了以下结果的一维和二维薛定谔算子,$H$,与有界的正基态:给定一个潜在的$V$,如果两个$H\pm V$是有界的从下面由$H$的基态能量,那么$V\equiv 0$。

英文摘要:

We show that whole-line Schrödinger operators with finitely many bound states have no embedded singular spectrum. In contradistinction, we show that embedded singular spectrum is possible even when the bound states approach the essential spectrum exponentially fast. We also prove the following result for one- and two-dimensional Schrödinger operators, $H$, with bounded positive ground states: Given a potential $V$, if both $H\pm V$ are bounded from below by the ground-state energy of $H$, then $V\equiv 0$.

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