Abstract
We investigate theoretically a nanoscopic device in which quantum interference of electronwaves takes place in the presence of their mutual Coulomb interaction. The device consistsof interacting quantum dots coupled to spin-polarized leads via quantum point contactswith Rashba interaction. The Rashba spin-flip-assisted inter-subband mixing in quantumpoint contacts induces quantum interference between the tunneling waves, which interactby Coulomb repulsion inside the dot. The spin-dependent Fano resonances, which appearin the conductance through the device, are significantly modified by Coulombinteractions. Their width and shape depend on the quantum dot spin-up and spin-downoccupancies, controlled by electron interactions. On the other hand, correlatorscalculated for the quantum dot spin sub-levels are not influenced by quantuminterference between them and depend rather on the degree of localization of theselevels.
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