Judge, Edmund, Naboko, Serguei, Wood, Ian (2018) Spectral results for perturbed periodic Jacobi matrices using the discrete Levinson technique. Studia Mathematica, . ISSN 0039-3223. (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:65787)
PDF (Online First version - pub has given go ahead to use this doc)
Publisher pdf
Language: English Restricted to Repository staff only |
|
Contact us about this Publication
|
Abstract
For an arbitrary Hermitian period-T Jacobi operator, we assume a perturbation by a Wigner-von Neumann type potential to devise subordinate solutions to the formal spectral equation for a (possibly infinite) real set, S, of the spectral parameter. We employ discrete Levinson type techniques to achieve this, which allow the analysis of the asymptotic behaviour of the solutions. This enables us to construct infinitely many spectral singularities on the absolutely continuous spectrum of the periodic Jacobi operator, which are stable with respect to an l^1-perturbation. An analogue of the quantisation conditions from the continuous case appears, relating the frequency of the oscillation of the potential to the quasi-momentum associated with the purely periodic operator.
Item Type: | Article |
---|---|
Uncontrolled keywords: | Jacobi operators, Levinson techniques, periodic operators, Wigner-von Neumann potentials, subordinate solutions |
Subjects: | Q Science > QA Mathematics (inc Computing science) > QA299 Analysis, Calculus |
Divisions: | Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Mathematics, Statistics and Actuarial Science |
Depositing User: | Ian Wood |
Date Deposited: | 25 Jan 2018 12:44 UTC |
Last Modified: | 16 Feb 2021 13:52 UTC |
Resource URI: | https://kar.kent.ac.uk/id/eprint/65787 (The current URI for this page, for reference purposes) |
- Export to:
- RefWorks
- EPrints3 XML
- BibTeX
- CSV
- Depositors only (login required):