Driven superconducting proximity effect in interacting quantum dots

Abstract

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.

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

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Cited by in corpus (8)

• Cavity photons as a probe for charge relaxation resistance and photon emission in a quantum dot coupled to normal and superconducting continua
• Renormalization effects in interacting quantum dots coupled to superconducting leads
• Replicas of the Fano resonances induced by phonons in a subgap Andreev tunneling
• Effective Long-Range Pairing and Hopping in Topological Nanowires Weakly Coupled to $s$-Wave Superconductors
• Pair-amplitude dynamics in strongly-coupled superconductor-quantum dot hybrids
• Electron-electron interaction effects on transport through mesoscopic superconducting hybrid junctions
• Enhanced negative nonlocal conductance in an interacting quantum dot connected to two ferromagnetic leads and one superconducting lead
• Nanomechanics driven by the superconducting proximity effect