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arXiv 1201.2610math.SPmath.CA
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具有(α δ '+ βδ)-like位势的Schroedinger算子:范数预解式收敛和可解模型

Schroedinger operators with (αδ'+βδ)-like potentials: norm resolvent convergence and solvable models

Yuriy Golovaty

摘要:

对于可积且紧支撑的实函数Φ和ε,我们证明了一维Schroedinger算子族S(ε)在形式为S(ε)= -D^2 + αε^{-2} Φ(x/ε)+ βε^{-1}<$(x/ε)的直线上当ε趋于0时的范数预解式收敛性.极限结果与形状相关:在不参考分布意义上的势收敛的情况下,极限算子S(0)存在并且强烈依赖于对(Φ,Ψ)。我们证明了不可能只给伪哈密顿量-D^2 + α δ '(x)+ βδ(x)指定一个自伴算子,这是一种符号表示法,只适用于性质完全不同的各种量子系统.

英文摘要:

For real functions Φand Ψthat are integrable and compactly supported, we prove the norm resolvent convergence, as ε goes to 0, of a family S(ε) of one-dimensional Schroedinger operators on the line of the form S(ε)= -D^2 + αε^{-2} Φ(x/ε) + βε^{-1} Ψ(x/ε). The limit results are shape-dependent: without reference to the convergence of potentials in the sense of distributions the limit operator S(0) exists and strongly depends on the pair (Φ,Ψ). We show that it is impossible to assign just one self-adjoint operator to the pseudo-Hamiltonian -D^2 + αδ'(x) + βδ(x), which is a symbolic notation only for a wide variety of quantum systems with quite different properties.

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