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Updated: Jun 4, 2026

Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
Interference of Fano-Rashba conductance dips
M M Gelabert1, A Renart, L Serra
1Departament de Física, Universitat de les Illes Balears, Palma de Mallorca, Spain.
Abstract:
We study the interference of two tunable Rashba regions in a quantum wire with one propagating mode. The transmission dips (Fano-Rashba dips) of the two regions either cross or anti-cross, depending on the distance between the two regions. For large separations we find Fabry-Perot oscillations due to the interference of forwards and backwards propagating modes. At small separations overlapping evanescent modes play a prominent role, leading to an enhanced transmission and destroying the conductance dip. Analytical expressions in scattering matrix theory are given and the relevance of the interference effect in a device is discussed.
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