Mathematical scattering theory in quantum waveguides
- Authors: Plamenevskii B.A.1, Poretskii A.S.1, Sarafanov O.V.1
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Affiliations:
- Saint-Petersburg State University
- Issue: Vol 489, No 2 (2019)
- Pages: 142-146
- Section: Mechanics
- URL: https://journals.eco-vector.com/0869-5652/article/view/17928
- DOI: https://doi.org/10.31857/S0869-56524892142-146
- ID: 17928
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Abstract
A waveguide occupies a domain G with several cylindrical ends. The waveguide is described by a nonstationary equation of the form i∂t f = Af , where A is a selfadjoint second order elliptic operator with variable coefficients (in particular, for A = -Δ, where Δ stands for the Laplace operator, the equation coincides with the Schrodinger equation). For the corresponding stationary problem with spectral parameter, we define continuous spectrum eigenfunctions and a scattering matrix. The limiting absorption principle provides expansion in the continuous spectrum eigenfunctions. We also calculate wave operators and prove their completeness. Then we define a scattering operator and describe its connections with the scattering matrix.
About the authors
B. A. Plamenevskii
Saint-Petersburg State University
Author for correspondence.
Email: b.plamenevskii@spbu.ru
Russian Federation, 7/9, Universitetskaya embankment, Saint-Petersburg, 199034
A. S. Poretskii
Saint-Petersburg State University
Email: st036768@student.spbu.ru
Russian Federation, 7/9, Universitetskaya embankment, Saint-Petersburg, 199034
O. V. Sarafanov
Saint-Petersburg State University
Email: b.plamenevskii@spbu.ru
Russian Federation, 7/9, Universitetskaya embankment, Saint-Petersburg, 199034
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