Single Cooper-pair pumping in the adiabatic limit and beyond

2012/06/01 by Simone Gasparinetti, S. Gasparinetti, Paolo Solinas +3
Physics and Astronomy · #Adiabatic process #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Cooper pair #Josephson effect #Physics #Physics of Superconductivity and Magnetism #Quantum #Quantum and electron transport phenomena #Quantum decoherence #Quantum mechanics #Quantum tunnelling #Quasiparticle #Superconductivity #cond-mat.mes-hall #quant-ph

paper · pdf · doi:10.1103/physrevb.86.060502

published as Phys. Rev. B 86, 060502(R) (2012) · 5 pages, 5 figures

arxiv created 2012/06/01 · openalex publication_date 2012/08/02 · arxiv updated 2012/08/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Experimental Determination of the Berry Phase in a Superconducting Charge Pump
• Time-domain measurements of quasiparticle tunneling rates in a single-Cooper-pair transistor
• Evidence of Cooper-pair pumping with combined flux and voltage control
• Connecting Berry’s phase and the pumped charge in a Cooper pair pump
• Geometric Landau-Zener Interferometry