A quantitative study of quasiparticle traps using the single-Cooper-pair-transistor
arXiv:0710.2760 · doi:10.1103/PhysRevB.77.100501
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.
4 pages, 4 figs