Resonant Pair Tunneling in Double Quantum Dots

Details Resonant Pair Tunneling in Double Quantum Dots Resonant Pair Tunneling in Double Quantum Dots

2009-03-31

arxiv.org/abs/0903.5545v1

Phys. Rev. Lett. 103, 087204 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 1 figure

Scientific paper

We present exact results on the non-equilibrium current fluctuations for 2 quantum dots in series throughout a crossover from non-Fermi liquid to Fermi liquid behavior described by the 2 impurity Kondo model. The result corresponds to resonant tunneling of carriers of charge $2e$ for a critical inter-impurity coupling. At low energy scales, the result can be understood from a Fermi liquid approach that we develop and use to also study non-equilibrium transport in an alternative double dot realization of the 2 impurity Kondo model under current experimental study.

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