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

V. A. Sevriuk; W. Liu; J. Rönkkö; H. Hsu; F. Marxer; T. F. Mörstedt; Meeri Partanen; J. Räbinä; M. Venkatesh; J. Hotari; Leif Grönberg; J. Heinsoo; T. Li; J. Tuorila; K. W. Chan; Juha Hassel; K. Y. Tan; M. Möttönen

doi:10.1063/5.0129345

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

V. A. Sevriuk^*
, W. Liu
, J. Rönkkö
, H. Hsu
, F. Marxer
, T. F. Mörstedt
, Meeri Partanen
, J. Räbinä
, M. Venkatesh
, J. Hotari
, Leif Grönberg
, J. Heinsoo
, T. Li
, J. Tuorila
, K. W. Chan
, Juha Hassel
, K. Y. Tan
, M. Möttönen

^*Corresponding author for this work

BA6208 Quantum computing hardware

IQM Finland Oy
IQM Germany GmbH
Aalto University
VTT (former employee or external)

Research output: Contribution to journal › Article › Scientific › peer-review

13 Citations (Scopus)

Abstract

We 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.

Original language	English
Article number	234002
Journal	Applied Physics Letters
Volume	121
Issue number	23
DOIs	https://doi.org/10.1063/5.0129345
Publication status	Published - 5 Dec 2022
MoE publication type	A1 Journal article-refereed

Funding

We have received funding from the European Research Council under Grant Nos. 681311 (QUESS), 957440 (SCAR), and 101053801 (ConceptQ), European Commission through H2020 program projects QMiCS (grant agreement 820505, Quantum Flagship), Business Finland (Quantum Technologies Industrial Grant No. 41419/31/2020), the Academy of Finland through its Centers of Excellence Program (Project Nos. 312300 and 336810), and the Research Impact Foundation.

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Sevriuk, 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, 121(23), Article 234002. https://doi.org/10.1063/5.0129345

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title = "Initial experimental results on a superconducting-qubit reset based on photon-assisted quasiparticle tunneling",

abstract = "We 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.",

author = "Sevriuk, \{V. A.\} and W. Liu and J. R{\"o}nkk{\"o} and H. Hsu and F. Marxer and M{\"o}rstedt, \{T. F.\} and Meeri Partanen and J. R{\"a}bin{\"a} and M. Venkatesh and J. Hotari and Leif Gr{\"o}nberg and J. Heinsoo and T. Li and J. Tuorila and Chan, \{K. W.\} and Juha Hassel and Tan, \{K. Y.\} and M. M{\"o}tt{\"o}nen",

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Sevriuk, VA, Liu, W, Rönkkö, J, Hsu, H, Marxer, F, Mörstedt, TF, Partanen, M, Räbinä, J, Venkatesh, M, Hotari, J, Grönberg, L, Heinsoo, J, Li, T, Tuorila, J, Chan, KW, Hassel, J, Tan, KY & 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/10.1063/5.0129345

TY - JOUR

T1 - Initial experimental results on a superconducting-qubit reset based on photon-assisted quasiparticle tunneling

AU - Sevriuk, V. A.

AU - Liu, W.

AU - Rönkkö, J.

AU - Hsu, H.

AU - Marxer, F.

AU - Mörstedt, T. F.

AU - Partanen, Meeri

AU - Räbinä, J.

AU - Venkatesh, M.

AU - Hotari, J.

AU - Grönberg, Leif

AU - Heinsoo, J.

AU - Li, T.

AU - Tuorila, J.

AU - Chan, K. W.

AU - Hassel, Juha

AU - Tan, K. Y.

AU - Möttönen, M.

PY - 2022/12/5

Y1 - 2022/12/5

N2 - We 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.

AB - We 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.

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VL - 121

JO - Applied Physics Letters

JF - Applied Physics Letters

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M1 - 234002

ER -

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

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

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