Two mesoscopic models of two interacting electrons

Details Two mesoscopic models of two interacting electrons Two mesoscopic models of two interacting electrons

2009-05-24

arxiv.org/abs/0905.3881v2

Phys. Rev. B 80, 245304 (2009)

Physics

Quantum Physics

8 pages, 5 figures, revised version, to appear in Phys. Rev. B

Scientific paper

We study two simple mesoscopic models of interacting two electrons; first one consists of two quantum coherent parallel conductors with long-range Coulomb interaction in some localized region and the other is of an interacting quantum dot (QD) side-coupled to a noninteracting quantum wire. We evaluate exact two-particle scattering matrix as well as two-particle current which are relevant in a two-particle scattering experiment in these models. Finally we show that the on-site repulsive interaction in the QD filters out the spin-singlet two-electron state from the mixed two-electron input states in the side-coupled QD model.

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