WebIn particular, we provide a detailed discussion of geometric and algebraic multiplicities of eigenvalues of the basic operator of interest (e.g., a Schrödinger operator) and the associated Birman–Schwinger operator, and additionally offer a careful study of the associated Jordan chains of generalized eigenvectors of both operators. WebUNIFORM BOUNDS OF DISCRETE BIRMAN-SCHWINGER OPERATORS YUKIHIDE TADANO AND KOUICHI TAIRA Abstract. In this note, uniform bounds of the Birman-Schwinger operators in the discrete setting are studied. For uniformly decaying potentials, we obtain the same bound as in the continuous setting. However, for non-uniformly
Spectral properties of soft quantum waveguides - IOPscience
WebJan 1, 2024 · The combination of the Birman-Schwinger principle with resolvent estimates for free operators is one of the way to approach the localization problem for eigenvalues: it has been widely employed in ... http://mathphys.uva.es/files/2024/07/fphy-07-00102.pdf birthday embroidery font
ESTIMATES FOR THE NUMBER OF EIGENVALUES OF NON …
WebNov 9, 2015 · The idea of decomposing the Birman–Schwinger operator into the sum of a rank-one singular operator and a regular remainder is well known and powerful tool in analysis of weak-coupling constant regular perturbations . It has been also used to treat Schrödinger operator with weak singular potentials, see . 4.4. ... Webself-adjoint operators. We consider ve di erent operators, three of them discrete and two continuous. Discrete operators are as follows: Schr odinger operator de ned on Z + with a complex potential, Schr odinger operator de ned on Z with a complex potential, and a Dirac operator de ned on Z, also with a complex potential. The latter WebDec 15, 2024 · A standard trick (a form of the Birman-Schwinger principle) enables us to carry over the eigenvalue estimates in Theorem 3.3 to the case of operator acting in the … birthday embroidery designs