Crossing of two Coulomb-Blockade Resonances

Details Crossing of two Coulomb-Blockade Resonances Crossing of two Coulomb-Blockade Resonances

2003-03-13

arxiv.org/abs/cond-mat/0303254v1

Phys. Rev. B 68 (2003) 125326

Physics

Condensed Matter

Disordered Systems and Neural Networks

15 pages, 1 figure

Scientific paper

10.1103/PhysRevB.68.125326

We investigate theoretically the transport of non--interacting electrons through an Aharanov--Bohm (AB) interferometer with two quantum dots (QD) 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--Buttiker 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.

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