Time-domain characterization and correction of on-chip distortion of control pulses in a quantum processor

M. A. Rol; L. Ciorciaro; F. K. Malinowski; B. M. Tarasinski; R. E. Sagastizabal; C. C. Bultink; Y. Salathe; N. Haandbaek; J. Sedivy; L. Dicarlo

doi:10.1063/1.5133894

Time-domain characterization and correction of on-chip distortion of control pulses in a quantum processor

M. A. Rol, L. Ciorciaro, F. K. Malinowski, B. M. Tarasinski, R. E. Sagastizabal, C. C. Bultink, Y. Salathe, N. Haandbaek, J. Sedivy, L. Dicarlo^*

^*Corresponding author for this work

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

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Abstract

We introduce Cryoscope, a method for sampling on-chip baseband pulses used to dynamically control qubit frequency in a quantum processor. We specifically use Cryoscope to measure the step response of the dedicated flux control lines of two-junction transmon qubits in circuit QED processors with the temporal resolution of the room-temperature arbitrary waveform generator producing the control pulses. As a first application, we iteratively improve this step response using optimized real-time digital filters to counter the linear-dynamical distortion in the control line, as needed for high-fidelity repeatable one- and two-qubit gates based on dynamical control of qubit frequency.

Original language	English
Article number	054001
Number of pages	6
Journal	Applied Physics Letters
Volume	116
Issue number	5
DOIs	https://doi.org/10.1063/1.5133894
Publication status	Published - 2020

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APL19-AR-09541Accepted author manuscript, 1.49 MB

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abstract = "We introduce Cryoscope, a method for sampling on-chip baseband pulses used to dynamically control qubit frequency in a quantum processor. We specifically use Cryoscope to measure the step response of the dedicated flux control lines of two-junction transmon qubits in circuit QED processors with the temporal resolution of the room-temperature arbitrary waveform generator producing the control pulses. As a first application, we iteratively improve this step response using optimized real-time digital filters to counter the linear-dynamical distortion in the control line, as needed for high-fidelity repeatable one- and two-qubit gates based on dynamical control of qubit frequency.",

author = "Rol, {M. A.} and L. Ciorciaro and Malinowski, {F. K.} and Tarasinski, {B. M.} and Sagastizabal, {R. E.} and Bultink, {C. C.} and Y. Salathe and N. Haandbaek and J. Sedivy and L. Dicarlo",

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AU - Rol, M. A.

AU - Ciorciaro, L.

AU - Malinowski, F. K.

AU - Tarasinski, B. M.

AU - Sagastizabal, R. E.

AU - Bultink, C. C.

AU - Salathe, Y.

AU - Haandbaek, N.

AU - Sedivy, J.

AU - Dicarlo, L.

N1 - Accepted Author Manuscript

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Y1 - 2020

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AB - We introduce Cryoscope, a method for sampling on-chip baseband pulses used to dynamically control qubit frequency in a quantum processor. We specifically use Cryoscope to measure the step response of the dedicated flux control lines of two-junction transmon qubits in circuit QED processors with the temporal resolution of the room-temperature arbitrary waveform generator producing the control pulses. As a first application, we iteratively improve this step response using optimized real-time digital filters to counter the linear-dynamical distortion in the control line, as needed for high-fidelity repeatable one- and two-qubit gates based on dynamical control of qubit frequency.

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JO - Applied Physics Letters

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Time-domain characterization and correction of on-chip distortion of control pulses in a quantum processor

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