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@ARTICLE{Gustavsson:825701,
author = {Gustavsson, S. and Yan, F. and Catelani, G. and Bylander,
J. and Kamal, A. and Birenbaum, J. and Hover, D. and
Rosenberg, D. and Samach, G. and Sears, A. P. and Weber, S.
J. and Yoder, J. L. and Clarke, J. and Kerman, A. J. and
Yoshihara, F. and Nakamura, Y. and Orlando, T. P. and
Oliver, W. D.},
title = {{S}uppressing relaxation in superconducting qubits by
quasiparticle pumping},
journal = {Science},
volume = {354},
number = {6319},
issn = {1095-9203},
address = {Washington, DC [u.a.]},
publisher = {American Association for the Advancement of Science64196},
reportid = {FZJ-2017-00018},
pages = {1573 - 1577},
year = {2016},
abstract = {Dynamical error suppression techniques are commonly used to
improve coherence in quantum systems. They reduce dephasing
errors by applying control pulses designed to reverse
erroneous coherent evolution driven by environmental noise.
However, such methods cannot correct for irreversible
processes such as energy relaxation. We investigate a
complementary, stochastic approach to reducing errors:
Instead of deterministically reversing the unwanted qubit
evolution, we use control pulses to shape the noise
environment dynamically. In the context of superconducting
qubits, we implement a pumping sequence to reduce the number
of unpaired electrons (quasiparticles) in close proximity to
the device. A $70\%$ reduction in the quasiparticle density
results in a threefold enhancement in qubit relaxation times
and a comparable reduction in coherence variability.},
cin = {PGI-2},
ddc = {500},
cid = {I:(DE-Juel1)PGI-2-20110106},
pnm = {144 - Controlling Collective States (POF3-144)},
pid = {G:(DE-HGF)POF3-144},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000390254300049},
pubmed = {pmid:27940578},
doi = {10.1126/science.aah5844},
url = {https://juser.fz-juelich.de/record/825701},
}