Initial experimental results on a superconducting-qubit reset based on photon-assisted quasiparticle tunneling

dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorSevriuk, V.A.en_US
dc.contributor.authorLiu, W.en_US
dc.contributor.authorRönkkö, J.en_US
dc.contributor.authorHsu, H.en_US
dc.contributor.authorMarxer, F.en_US
dc.contributor.authorMörstedt, T.F.en_US
dc.contributor.authorPartanen, M.en_US
dc.contributor.authorRäbinä, J.en_US
dc.contributor.authorVenkatesh, M.en_US
dc.contributor.authorHotari, J.en_US
dc.contributor.authorGrönberg, L.en_US
dc.contributor.authorHeinsoo, J.en_US
dc.contributor.authorLi, T.en_US
dc.contributor.authorTuorila, J.en_US
dc.contributor.authorChan, K.W.en_US
dc.contributor.authorHassel, J.en_US
dc.contributor.authorTan, K.Y.en_US
dc.contributor.authorMöttönen, M.en_US
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.groupauthorQuantum Computing and Devicesen
dc.contributor.groupauthorCentre of Excellence in Quantum Technology, QTFen
dc.contributor.organizationIqm Quantum Computersen_US
dc.contributor.organizationIQMen_US
dc.contributor.organizationVTT Technical Research Centre of Finlanden_US
dc.date.accessioned2022-12-22T09:44:22Z
dc.date.available2022-12-22T09:44:22Z
dc.date.issued2022-12-07en_US
dc.description| openaire: EC/H2020/681311/EU//QUESS | openaire: EC/H2020/957440/EU//SCAR | openaire: EC/H2020/101053801/EU//ConceptQ | openaire: EC/H2020/820505/EU//QMiCS
dc.description.abstractWe present here our recent results on qubit reset scheme based on a quantum-circuit refrigerator (QCR). In particular, we use the photon-assisted quasiparticle tunneling through a superconductor–insulator–normal-metal–insulator–superconductor junction to controllably decrease the energy relaxation time of the qubit during the QCR operation. In our experiment, we use a transmon qubit with dispersive readout. The QCR is capacitively coupled to the qubit through its normal-metal island. We employ rapid, square-shaped QCR control voltage pulses with durations in the range of 2–350 ns and a variety of amplitudes to optimize the reset time and fidelity. Consequently, we reach a qubit ground-state probability of roughly 97% with 80-ns pulses starting from the first excited state. The qubit state probability is extracted from averaged readout signal, where the calibration is based on Rabi oscillations, thus not distinguishing the residual thermal population of the qubit.en
dc.description.versionPeer revieweden
dc.format.extent8
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationSevriuk, V A, Liu, W, Rönkkö, J, Hsu, H, Marxer, F, Mörstedt, T F, Partanen, M, Räbinä, J, Venkatesh, M, Hotari, J, Grönberg, L, Heinsoo, J, Li, T, Tuorila, J, Chan, K W, Hassel, J, Tan, K Y & Möttönen, M 2022, ' Initial experimental results on a superconducting-qubit reset based on photon-assisted quasiparticle tunneling ', Applied Physics Letters, vol. 121, no. 23, 234002 . https://doi.org/10.1063/5.0129345en
dc.identifier.doi10.1063/5.0129345en_US
dc.identifier.issn0003-6951
dc.identifier.issn1077-3118
dc.identifier.otherPURE UUID: 61ca9d81-0818-4e2a-84fb-06d2086d0468en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/61ca9d81-0818-4e2a-84fb-06d2086d0468en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85144537019&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/106898712/234002_1_online_1.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/118501
dc.identifier.urnURN:NBN:fi:aalto-202212227239
dc.language.isoenen
dc.publisherAmerican Institute of Physics
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/820505/EU//QMiCSen_US
dc.relation.ispartofseriesApplied Physics Lettersen
dc.relation.ispartofseriesVolume 121en
dc.rightsopenAccessen
dc.titleInitial experimental results on a superconducting-qubit reset based on photon-assisted quasiparticle tunnelingen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
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