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arxiv: quant-ph/0206112 · v1 · submitted 2002-06-18 · 🪐 quant-ph

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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