Driven superconducting proximity effect in interacting quantum dots

Details Driven superconducting proximity effect in interacting quantum dots Driven superconducting proximity effect in interacting quantum dots

2012-01-24

arxiv.org/abs/1201.5032v2

Phys. Rev. B 85, 094518 (2012)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 5 figures, paper substantially extended: new section, new figure, new references introduced

Scientific paper

10.1103/PhysRevB.85.094518

We present a theory of non-equilibrium superconducting proximity effect in an interacting quantum dot induced by a time-dependent tunnel coupling between dot and a superconducting lead. The proximity effect, that is established when the driving frequency fulfills a gate-voltage-dependent resonance condition, can be probed through the tunneling current into a weakly-coupled normal lead. Furthermore, we propose to generate and manipulate coherent superpositions of quantum-dot states with electron numbers differing by two, by applying pulsed oscillatory variations to the couplings between dot and superconductors.

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