Single Cooper-pair pumping in the adiabatic limit and beyond

Abstract

We demonstrate controlled pumping of Cooper pairs down to the level of a single pair per cycle, using an rf-driven Cooper-pair sluice. We also investigate the breakdown of the adiabatic dynamics in two different ways. By transferring many Cooper pairs at a time, we observe a crossover between pure Cooper-pair and mixed Cooper-pair-quasiparticle transport. By tuning the Josephson coupling that governs Cooper-pair tunneling, we characterize Landau-Zener transitions in our device. Our data are quantitatively accounted for by a simple model including decoherence effects.

arXiv comment5 pages, 5 figures

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• Weyl Josephson Circuits
• Lindblad equation approach for the full counting statistics of work and heat in driven quantum systems
• Environment-governed dynamics in driven quantum systems
• Cooper-pair transistor as a minimal topological quantum circuit
• Lamb shift enhancement and detection in strongly driven superconducting circuits
• Superconducting Quantum Interference Single-Electron Transistor
• Coherent Cooper-pair pumping by magnetic flux control
• 4$\pi$ and 8$\pi$ dual Josephson effects induced by symmetry defects
• Quantum effect of inductance on geometric Cooper-pair transport
• Full counting statistics applied to dissipative Cooper pair pumping