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首页> 外文期刊>Annales Henri Poincare >Spectral Theory of Semibounded Schr?dinger Operators with δ′-Interactions
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Spectral Theory of Semibounded Schr?dinger Operators with δ′-Interactions

机译:具有δ′-相互作用的半界Schr-dinger算子的光谱理论

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摘要

We study spectral properties of Hamiltonians H_(X,β,q) with δ′-point interactions on a discrete set X = {x_k}_(k=1)~∞ ? (0,+∞). Using the form approach, we establish analogs of some classical results on operators Hq = ?d~2/dx~2 + q with locally integrable potentials q ∈L_(loc)~1[0,+∞). In particular, we establish the analogues of the Glazman-Povzner-Wienholtz theorem, the Molchanov discreteness criterion, and the Birman theorem on stability of an essential spectrum. It turns out that in contrast to the case of Hamiltonians with δ-interactions, spectral properties of operators H_(X,β,q) are closely connected with those of H_(X,q)~N = ?_kH_(q,k)~N, where H_(q,k)~N is the Neumann realization of ?d~2/dx~2 + q in L~2(x_(k?1), x_k).
机译:我们研究了离散集合X = {x_k} _(k = 1)〜∞上具有δ'点相互作用的哈密顿量H_(X,β,q)的光谱特性。 (0,+∞)。使用形式方法,我们建立了在算子Hq =?d〜2 / dx〜2 + q上具有局部可积势q∈L_(loc)〜1 [0,+∞)的一些经典结果的类似物。特别是,我们建立了Glazman-Povzner-Wienholtz定理,Molchanov离散性准则和Birman定理在基本谱稳定性上的类似物。结果表明,与具有δ相互作用的哈密顿量的情况相比,算符H_(X,β,q)的光谱性质与H_(X,q)〜N =?_kH_(q,k)的光谱性质紧密相关。 〜N,其中H_(q,k)〜N是L〜2(x_(k?1),x_k)中dd2 / dx〜2 + q的诺伊曼实现。

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