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dc.contributor.authorPelinovsky, Dmitry E.
dc.contributor.authorStefanov, Atanas G.
dc.date.accessioned2015-03-26T16:29:09Z
dc.date.available2015-03-26T16:29:09Z
dc.date.issued2008-11-08
dc.identifier.citationPelinovsky, D. E. & Stefanov, A. "On the spectral theory and dispersive estimates for a discrete Schrödinger equation in one dimension." J. Math. Phys. 49, 113501 (2008); http://dx.doi.org/10.1063/1.3005597.en_US
dc.identifier.urihttp://hdl.handle.net/1808/17221
dc.descriptionThis is the published version, also available here: http://dx.doi.org/10.1063/1.3005597.en_US
dc.description.abstractBased on the recent work [Komech et al., “Dispersive estimates for 1D discrete Schrödinger and Klein-Gordon equations,” Appl. Anal.85, 1487 (2006)] for compact potentials, we develop the spectral theory for the one-dimensional discrete Schrödinger operator, Hϕ=(−Δ+V)ϕ=−(ϕn+1+ϕn−1−2ϕn)+Vnϕn. We show that under appropriate decay conditions on the general potential (and a nonresonance condition at the spectral edges), the spectrum of H consists of finitely many eigenvalues of finite multiplicities and the essential (absolutely continuous) spectrum, while the resolvent satisfies the limiting absorption principle and the Puiseux expansions near the edges. These properties imply the dispersive estimates ∥eitHPa.c.(H)∥l2σ→l2−σ≲t−3/2 for any fixed σ>52 and any t>0, where Pa.c.(H) denotes the spectral projection to the absolutely continuous spectrum of H. In addition, based on the scattering theory for the discrete Jost solutions and the previous results by Stefanov and Kevrekidis [“Asymptotic behaviour of small solutions for the discrete nonlinear Schrödinger and Klein-Gordon equations,” Nonlinearity18, 1841 (2005)], we find new dispersive estimates ∥eitHPa.c.(H)∥l1→l∞≲t−1/3, which are sharp for the discrete Schrödinger operators even for V=0.en_US
dc.publisherAmerican Institute of Physicsen_US
dc.subjectEigenvaluesen_US
dc.subjectScattering theoryen_US
dc.subjectAbsorption spectraen_US
dc.subjectDifference equationsen_US
dc.subjectGreen's function methodsen_US
dc.titleOn the spectral theory and dispersive estimates for a discrete Schrödinger equation in one dimensionen_US
dc.typeArticle
kusw.kuauthorStefanov, Atanas G.
kusw.kudepartmentMathematicsen_US
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dc.identifier.doi10.1063/1.3005597
kusw.oaversionScholarly/refereed, publisher version
kusw.oapolicyThis item meets KU Open Access policy criteria.
dc.rights.accessrightsopenAccess


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