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Journal Article

Crossing of two Coulomb blockade resonances


Weidenmüller,  H. A.
Prof. Hans A. Weidenmüller, Emeriti, MPI for Nuclear Physics, Max Planck Society;

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Weidenmüller, H. A. (2003). Crossing of two Coulomb blockade resonances. Physical Review B (Condensed Matter and Materials Physics -15(II)), 68, 125326-125334.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-8184-0
We investigate theoretically the transport of noninteracting electrons through an Aharanov-Bohm (AB) interferometer with two quantum dots (QD's) embedded into its arms. In the Coulomb blockade regime, transport through each QD proceeds via a single resonance. The resonances are coupled through the arms of the AB device, but may also be coupled directly. In the framework of the Landauer-Büttiker approach, we present expressions for the scattering matrix which depend explicitly on the energies of the two resonances and on the AB phase. We pay particular attention to the crossing of the two resonances.