An index theorem for Schrödinger operators on metric graphs

An index theorem for Schrödinger operators on metric graphs
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DOI:
10.1090/conm/741/14922
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发表时间:
2018-09
期刊:
Analytic Trends in Mathematical Physics
影响因子:
--
通讯作者:
Y. Latushkin;Selim Sukhtaiev
Y. Latushkin;Selim Sukhtaiev
中科院分区:
其他
文献类型:
--
作者:
Y. Latushkin;Selim Sukhtaiev

文献摘要

相似文献

证明了度量图上单参数Schr“odinger算子族的谱流等于描述顶点条件的Lagrange子空间的路的Maslov指数.此外,我们通过Maslov交叉形式导出了特征值曲线导数的Hadamard型公式。
We show that the spectral flow of a one-parameter family of Schr\"odinger operators on a metric graph is equal to the Maslov index of a path of Lagrangian subspaces describing the vertex conditions. In addition, we derive an Hadamard-type formula for the derivatives of the eigenvalue curves via the Maslov crossing form.