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.
@article{arxiv.0805.3445,
title = {Quasiparticle cooling of a single-Cooper-pair-transistor},
author = {A. J. Ferguson},
journal= {arXiv preprint arXiv:0805.3445},
year = {2012}
}