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 (11)

• Coherent dynamics of a flux qubit coupled to a harmonic oscillator
• Decoherence in a superconducting quantum bit circuit
• Nonequilibrium quasiparticles and $2e$ periodicity in single-Cooper-pair transistors
• Coherent dynamics of a Josephson charge qubit
• Quasiparticle decay rate of Josephson charge qubit oscillations
• Poisson transition rates from time-domain measurements with finite bandwidth
• 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
• Quasiparticle number fluctuations in superconductors
• Kinetics of quasiparticle trapping in a Cooper-pair box

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