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On Lacunas in the Lower Part of the Spectrum of the Periodic Magnetic Operator in a Strip

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Abstract

We consider the Schrödinger periodic magnetic operator in an infinite flat straight strip. We prove that if the magnetic potential satisfies certain conditions and the period is small enough, then the lower part of the band spectrum has no inner lacunas. The length of the lower part of the band spectrum with no inner lacunas is calculated explicitly. The upper estimate for the small parameter allowing these results is calculated as a number as well.

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Correspondence to D. I. Borisov.

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Translated from Sovremennaya Matematika. Fundamental’nye Napravleniya (Contemporary Mathematics. Fundamental Directions), Vol. 63, No. 3, Differential and Functional Differential Equations, 2017.

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Borisov, D.I. On Lacunas in the Lower Part of the Spectrum of the Periodic Magnetic Operator in a Strip. J Math Sci 253, 599–617 (2021). https://doi.org/10.1007/s10958-021-05257-x

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  • DOI: https://doi.org/10.1007/s10958-021-05257-x

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