Quasiparticle cooling of a single-Cooper-pair-transistor

Abstract

A superconducting tunnel junction is used to directly extract quasiparticles from one of the leads of a single-Cooper-pair-transistor. The consequent reduction in quasiparticle density causes a lower rate of quasiparticle tunneling onto the device. This rate is directly measured by radio-frequency reflectometry. Local cooling may be of direct benefit in reducing the effect of quasiparticles on coherent superconducting nanostructures.

4 figures

References in corpus (9)

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• Single Shot Charge Detection Using A Radio-Frequency Quantum Point Contact
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• A superconductor free of quasiparticles for seconds