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

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.organizationVTT Technical Research Centre of Finlanden_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.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 .
dc.identifier.otherPURE UUID: 61ca9d81-0818-4e2a-84fb-06d2086d0468en_US
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dc.publisherAmerican Institute of Physics
dc.relation.ispartofseriesApplied Physics Lettersen
dc.relation.ispartofseriesVolume 121en
dc.titleInitial experimental results on a superconducting-qubit reset based on photon-assisted quasiparticle tunnelingen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi