We consider a T--shaped, one--dimensional quantum waveguide containing an attractive or repulsive impurity in the lateral stub, and study how the resonance poles move in the complex $k$--plane when the strength or the position of the defect changes. Similarity and differences with respect to standard potential scattering problems are highlighted.
S-matrix pole trajectories in quantum wires with resonantly coupled cavities
CATTAPAN, GIORGIO;PASCOLINI, ALESSANDRO
2006
Abstract
We consider a T--shaped, one--dimensional quantum waveguide containing an attractive or repulsive impurity in the lateral stub, and study how the resonance poles move in the complex $k$--plane when the strength or the position of the defect changes. Similarity and differences with respect to standard potential scattering problems are highlighted.File in questo prodotto:
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