A description of the location and structure of the essential spectrum of a model operator in a subspace of a Fock space

Аннотация

We consider a certain model operator acting in a subspace of a fermionic Fock space. We obtain an analogue of Faddeev's equation. We describe the location of the essential spectrum of the operator under consideration and show that the essential spectrum consists of the union of at most four segments. Bibliography: 19 titles.

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DOI

10.1070/sm2014v205n12abeh004438

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