Design and Characterization of a <4-mW/Qubit 28-nm Cryo-CMOS Integrated Circuit for Full Control of a Superconducting Quantum Processor Unit Cell - INSPIRE

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Design and Characterization of a <4-mW/Qubit 28-nm Cryo-CMOS Integrated Circuit for Full Control of a Superconducting Quantum Processor Unit Cell

Juhwan Yoo
(
- Massachusetts U., Amherst and
- Unlisted, US
)
,
Zijun Chen
(
- Massachusetts U., Amherst and
- Unlisted, US
)
,
Frank Arute
(
- Massachusetts U., Amherst and
- Unlisted, US
)
,
Shirin Montazeri
(
- Massachusetts U., Amherst and
- Unlisted, US
)
,
Marco Szalay
(
- Massachusetts U., Amherst and
- Unlisted, US
)

Nov, 2023

16 pages

Published in:

IEEE J.Solid State Circuits 58 (2023) 11, 3044-3059

Published: Nov, 2023

DOI:

10.1109/JSSC.2023.3309317

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Abstract: (IEEE)

A universal fault-tolerant quantum computer will require large-scale control systems that can realize all the waveforms required to implement a gateset that is universal for quantum computing. Optimization of such a system, which must be precise and extensible, is an open research challenge. Here, we present a cryogenic quantum control integrated circuit (IC) that is able to control all the necessary degrees of freedom of a two-qubit subcircuit of a superconducting quantum processor. Specifically, the IC contains a pair of 4–8-GHz RF pulse generators for

XY

control, three baseband current generators for qubit and coupler frequency control, and a digital controller that includes a sequencer for gate sequence playback. After motivating the architecture, we describe the circuit-level implementation details and present experimental results. Using standard benchmarking techniques, we show that the cryogenic CMOS (cryo-CMOS) IC is able to execute the components of a gateset that is universal for quantum computing while achieving single-qubit

XY

and

Z

average gate error rates of 0.17%–0.36% and 0.14%–0.17%, respectively, as well as two-qubit average cross-entropy benchmarking (XEB) cycle error rates of 1.2%. These error rates, which were achieved while dissipating just 4 mW/qubit, are comparable to the measured error rates obtained using baseline room-temperature electronics.

Qubit
Logic gates
Integrated circuits
Error analysis
Process control
Superconducting integrated circuits
Couplers
Cryogenic CMOS (cryo-CMOS)
cryogenic electronics
quantum computing

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Figures(0)

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