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arXiv 1702.05299math-phmath.MPmath.SP
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组合图、量子图和连续空间中薛定谔本征函数的唯一延拓原理及其缺失

Unique continuation principles and their absence for Schrödinger eigenfunctions on combinatorial and quantum graphs and in continuum space

Norbert Peyerimhoff, Matthias Täufer, Ivan Veselic

摘要:

对于薛定谔方程和相关方程的分析,唯一延拓原理(UCP)是否成立是至关重要的。在连续欧几里德空间中,唯一连续的定量形式意味着具有随机势的薛定谔算子的积分态密度(IDS)的Wegner估计和正则性。对于格点上的离散薛定谔方程,只有弱的类似于UCP的情形成立,但它足以保证IDS的连续性。对于其他组合图,这不再是真的。类似地,对于量子图,UCP一般不成立,因此IDS不需要是连续的。

英文摘要:

For the analysis of the Schrödinger and related equations it is of central importance whether a unique continuation principle (UCP) holds or not. In continuum Euclidean space quantitative forms of unique continuation imply Wegner estimates and regularity properties of the integrated density of states (IDS) of Schrödinger operators with random potentials. For discrete Schrödinger equations on the lattice only a weak analog of the UCP holds, but it is sufficient to guarantee the continuity of the IDS. For other combinatorial graphs this is no longer true. Similarly, for quantum graphs the UCP does not hold in general and consequently, the IDS does not need to be continuous.

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