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

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

References in corpus (5)

• Quasiparticle decay rate of Josephson charge qubit oscillations
• Microsecond resolution of quasiparticle tunneling in the single-Cooper-pair-transistor
• Energy gap measurement of nanostructured thin aluminium films for use in single Cooper-pair devices
• Time-domain measurements of quasiparticle tunneling rates in a single-Cooper-pair transistor
• Kinetics of quasiparticle trapping in a Cooper-pair box

Cited by in corpus (2)

• Kinetics of non-equilibrium quasiparticle tunneling in superconducting charge qubits
• Quasiparticle poisoning and Josephson current fluctuations induced by Kondo impurities