New branches of the essential spectrum of a 2 × 2 operator matrix

DOI10.29229/uzmj.2020-2-5zbMath1488.81022OpenAlexW3048662461MaRDI QIDQ5006848

E. B. Dilmurodov

Publication date: 17 August 2021

Published in: Uzbek Mathematical Journal (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.29229/uzmj.2020-2-5

zbMATH Keywords

essential spectrumoperator matrixbosonic Fock spaceannihilation and creation operatorsthe Faddeev equation

Mathematics Subject Classification ID

Applications of operator theory in the physical sciences (47N50) Asymptotic distributions of eigenvalues in context of PDEs (35P20) Selfadjoint operator theory in quantum theory, including spectral analysis (81Q10)

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