Möbius structure of the spectral space of Schrödinger operators with point interaction
Möbius structure of the spectral space of Schrödinger operators with point interaction
复制标题
具有点相互作用的薛定谔算子谱空间的莫比乌斯结构
DOI:
10.1063/1.1415432
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发表时间:
2001
影响因子:
1.3
通讯作者:
T. Cheon
中科院分区:
文献类型:
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作者:
I. Tsutsui;T. Fulop;T. Cheon
The Schrodinger operator with point interaction in one dimension has a U(2) family of self-adjoint extensions. We study the spectrum of the operator and show that (i) the spectrum is uniquely determined by the eigenvalues of the matrix U∈U(2) that characterizes the extension, and that (ii) the space of distinct spectra is given by the orbifold T2/Z2 which is a Mobius strip with boundary. We employ a parametrization of U(2) that admits a direct physical interpretation and furnishes a coherent framework to realize the spectral duality and anholonomy recently found. This allows us to find that (iii) physically distinct point interactions form a three-parameter quotient space of the U(2) family.
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