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arXiv · 0710.2760

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

N. A. Court·A. J. Ferguson·Roman Lutchyn·R. G. Clark
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Abstract

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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N. A. Court, A. J. Ferguson, Roman Lutchyn, R. G. Clark. 2007-10-15. A quantitative study of quasiparticle traps using the single-Cooper-pair-transistor. https://doi.org/10.1103/physrevb.77.100501

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