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首页> 外文期刊>Journal of Physics, A. Mathematical and General: A Europhysics Journal >Spectral singularities of non-Hermitian Hamiltonians and SUSY transformations
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Spectral singularities of non-Hermitian Hamiltonians and SUSY transformations

机译:非埃尔米特哈密顿量和SUSY变换的谱奇点

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摘要

Simple examples of non-Hermitian Hamiltonians with purely real spectra defined in L-2(R+) having spectral singularities inside the continuous spectrum are given. It is shown that such Hamiltonians may appear by shifting the independent variable of a real potential into the complex plane. Also they may be created as SUSY partners of Hermitian Hamiltonians. In the latter case spectral singularities of a non-Hermitian Hamiltonian are ordinary points of the continuous spectrum for its Hermitian SUSY partner. Conditions for transformation functions are formulated when a complex potential with complex eigenenergies and spectral singularities has a SUSY partner with a real spectrum without spectral singularities. Finally, we shortly discuss why Hamiltonians with spectral singularities are 'bad'.
机译:给出了非赫米特哈密顿量的简单示例,这些哈密顿哈密顿量具有在L-2(R +)中定义的纯实谱,并且在连续谱内具有谱奇点。结果表明,这样的哈密顿量可以通过将实际势的自变量转移到复平面中而出现。也可以将它们作为Hermitian Hamiltonian的SUSY伙伴创建。在后一种情况下,非Hermitian哈密顿量的光谱奇点是其Hermitian SUSY伙伴的连续光谱的常点。当具有复杂的本征能和光谱奇点的复杂势具有具有真实光谱的SUSY伙伴而没有光谱奇点时,就可以确定转换函数的条件。最后,我们简短地讨论为什么具有光谱奇点的哈密顿量是“不好的”。

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