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Approximation of Dirac operators with $\boldsymbol{\delta}$-shell potentials in the norm resolvent sense, I. Qualitative results

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arxiv 2308.13344 v2 pith:QI54SJAM submitted 2023-08-25 math.SP

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keywords deltadiracoperatorspotentialsshellapproximationinteractionmathbb
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abstract

In this paper the approximation of Dirac operators with general $\delta$-shell potentials supported on $C^2$-curves in $\mathbb{R}^2$ or $C^2$-surfaces in $\mathbb{R}^3$, which may be bounded or unbounded, is studied. It is shown under suitable conditions on the weight of the $\delta$-interaction that a family of Dirac operators with regular, squeezed potentials converges in the norm resolvent sense to the Dirac operator with the $\delta$-shell interaction.

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  1. Approximation of Dirac operators with confining electrostatic and Lorentz scalar $\delta$-shell potentials

    math.SP 2025-05 conditional novelty 6.0 of 10

    Confining Dirac delta-shell operators, previously inaccessible, are shown to be norm resolvent limits of strongly localized potentials with diverging interaction strengths.

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