Point Interactions: PT-Hermiticity and Reality of the Spectrum
classification
🪐 quant-ph
keywords
interactionspointspectrummathcalself-adjointcomparedconditionsconsidered
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General point interactions for the second derivative operator in one dimension are studied. In particular, ${\mathcal P \mathcal T}$-self-adjoint point interactions with the support at the origin and at points $\pm l$ are considered. The spectrum of such non-Hermitian operators is investigated and conditions when the spectrum is pure real are presented. The results are compared with those for standard self-adjoint point interactions.
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