04212nam a22005895i 4500 978-3-031-49035-4 DE-He213 20251030111447.0 cr nn 008mamaa 240227s2024 sz | s |||| 0|eng d 9783031490354 978-3-031-49035-4 10.1007/978-3-031-49035-4 doi QC173.96-174.52 PHQ bicssc SCI057000 bisacsh PHQ thema Veliev, Oktay. author. aut http://id.loc.gov/vocabulary/relators/aut 71871 Multidimensional Periodic Schrödinger Operator [electronic resource] : Perturbation Theories for High Energy Regions and Their Applications / by Oktay Veliev. 3rd ed. 2024. Cham : Springer International Publishing : Imprint: Springer, 2024. XIII, 411 p. 1 illus. online resource. text txt rdacontent computer c rdamedia online resource cr rdacarrier text file PDF rda Springer Tracts in Modern Physics, 1615-0430 ; 291 Preliminary Facts -- From One-dimensional to Multidimensional -- Asymptotic Formulas for the Bloch Eigenvalues and Bloch Functions -- Constructive Determination of the Spectral Invariants -- Periodic Potential from the Spectral Invariants -- Conclusions and Some Generalization. This book describes the direct and inverse problems of the multidimensional Schrödinger operator with a periodic potential, a topic that is especially important in perturbation theory, constructive determination of spectral invariants and finding the periodic potential from the given Bloch eigenvalues. It provides a detailed derivation of the asymptotic formulas for Bloch eigenvalues and Bloch functions in arbitrary dimensions while constructing and estimating the measure of the iso-energetic surfaces in the high-energy regime. Moreover, it presents a unique method proving the validity of the Bethe–Sommerfeld conjecture for arbitrary dimensions and arbitrary lattices. Using the perturbation theory constructed, it determines the spectral invariants of the multidimensional operator from the given Bloch eigenvalues. Some of these invariants are explicitly expressed by the Fourier coefficients of the potential, making it possible to determine the potential constructively using Bloch eigenvalues as input data. Lastly, the book presents an algorithm for the unique determination of the potential. This updated and significantly expanded third edition features an extension of this framework to all dimensions, offering a now complete theory of self-adjoint Schrödinger operators within periodic potentials. Drawing from recent advancements in mathematical analysis, this edition delves even deeper into the intricacies of the subject. It explores the connections between the multidimensional Schrödinger operator, periodic potentials, and other fundamental areas of mathematical physics. The book's comprehensive approach equips both students and researchers with the tools to tackle complex problems and contribute to the ongoing exploration of quantum phenomena. Quantum physics. 66608 Operator theory. Differential equations. Condensed matter. 66773 Mathematical physics. Quantum Physics. 66608 Operator Theory. Differential Equations. Condensed Matter Physics. 71872 Mathematical Physics. SpringerLink (Online service) Springer Nature eBook Printed edition: 9783031490347 Printed edition: 9783031490361 Printed edition: 9783031490378 Springer Tracts in Modern Physics, 1615-0430 ; 291 71873 https://doi.org/10.1007/978-3-031-49035-4 ZDB-2-PHA ZDB-2-SXP 57920 57920