Telefonaktiebolaget Lm Ericsson (Publ)

Mats Jonson

Erland Wikborg

Zdravko G Ivanov

Tord Claeson

Robert Shekhter

Anatoli Kadiqrobov

The present invention relates on an interferometer arrangement comprising a source electrode and a drain electrode, a base electrode to which the source electrode and the drain electrode are connected through tunnel barriers, the base electrode thus forming a double barrier quantum well, and first and second superconducting gate electrodes to control the source-drain current. The base electrode comprises a ferromagnetic material enabling resonant tunneling of source-drain electrons when there are bound states within the quantum well structure matching the energy of said source-drain electrons. The invention also relates to a logical element comprising such an interferometer arrangement and to a method of controlling the conductance of an interferometer.

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Göteborg, Sweden

Mats Jonson