A quantitative study of quasiparticle traps using the single-Cooper-pair-transistor

Details A quantitative study of quasiparticle traps using the single-Cooper-pair-transistor A quantitative study of quasiparticle traps using the single-Cooper-pair-transistor

2007-10-15

arxiv.org/abs/0710.2760v1

Phys. Rev. B 77, 100501 (2008)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figs

Scientific paper

10.1103/PhysRevB.77.100501

We use radio-frequency reflectometry to measure quasiparticle tunneling rates in the single-Cooper-pair-transistor. Devices with and without quasiparticle traps in proximity to the island are studied. A $10^2$ to $10^3$-fold reduction in the quasiparticle tunneling rate onto the island is observed in the case of quasiparticle traps. In the quasiparticle trap samples we also measure a commensurate decrease in quasiparticle tunneling rate off the island.

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