S-matrix poles close to thresholds in confined geometries

G. Cattapan () and P. Lotti

The European Physical Journal B: Condensed Matter and Complex Systems, 2007, vol. 60, issue 2, 181-185

Abstract: We have studied the behavior of the S–matrix poles near threshold for quantum waveguides coupled to a cavity with a defect. We emphasize the occurrence of both dominant and shadow poles on the various sheets of the energy Riemann surface, and show that the changes of the total conductivity near threshold as the cavity's width changes can be explained in terms of dominant to shadow pole transitions. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2007

Keywords: 73.63.Nm Quantum wires; 73.23.Ad Ballistic transport; 72.10.Fk Scattering by point defects; dislocations; surfaces; and other imperfections (including Kondo effect) (search for similar items in EconPapers)
Date: 2007
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Citations: View citations in EconPapers (1)

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DOI: 10.1140/epjb/e2007-00337-6

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