Cited by 119Quantum Computing Algorithms and ArchitectureQuantum Information and CryptographyQuantum many-body systems

Direct Randomized Benchmarking for Multiqubit Devices

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Proctor, Timothy J., Carignan-Dugas, Arnaud, Rudinger, Kenneth, Nielsen, Erik, Blume-Kohout, Robin, Young, Kevin·2019·Physical Review Letters

Abstract

Benchmarking methods that can be adapted to multiqubit systems are essential for assessing the overall or "holistic" performance of nascent quantum processors. The current industry standard is Clifford randomized benchmarking (RB), which measures a single error rate that quantifies overall performance. But, scaling Clifford RB to many qubits is surprisingly hard. It has only been performed on one, two, and three qubits as of this writing. This reflects a fundamental inefficiency in Clifford RB: the n-qubit Clifford gates at its core have to be compiled into large circuits over the one- and two-qubit gates native to a device. As n grows, the quality of these Clifford gates quickly degrades, making Clifford RB impractical at relatively low n. In this Letter, we propose a direct RB protocol that mostly avoids compiling. Instead, it uses random circuits over the native gates in a device, which are seeded by an initial layer of Clifford-like randomization. We demonstrate this protocol experimentally on two to five qubits using the publicly available ibmqx5. We believe this to be the greatest number of qubits holistically benchmarked, and this was achieved on a freely available device without any special tuning up. Our protocol retains the simplicity and convenient properties of Clifford RB: it estimates an error rate from an exponential decay. But, it can be extended to processors with more qubits-we present simulations on 10+ qubits-and it reports a more directly informative and flexible error rate than the one reported by Clifford RB. We show how to use this flexibility to measure separate error rates for distinct sets of gates, and we use this method to estimate the average error rate of a set of cnot gates.

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Crossref · 10.1103/physrevlett.123.030503

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  • Existing works have already proposed to adopt randomly generated benchmarks for evaluating the error rates of different gate operations regarding a particular NISQ device.

    “Existing works have already proposed to adopt randomly generated benchmarks for evaluating the error rates of diferent gate operations regarding a particular NISQ device [83, 84, 106].”
  • Detailed modeling predicts that the SPAM error is dominated by measurement error for 171Yb+.

    “however, detailed modeling predicts that the SPAM error is dominated by measurement error for 171 Yb þ [47,48].”

    From A Race-Track Trapped-Ion Quantum Processor (2023) · cites this paper as [48]

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Authors
Proctor, T. J., Carignan-Dugas, A., Rudinger, K., Nielsen, E., Blume-Kohout, R., & Young, K.
Affiliations
  • Sandia National Laboratories California (US)
  • University of Waterloo (CA)
  • Sandia National Laboratories (US)
Venue
Physical Review Letters
Published
2019-07-19
Volume
123
Issue
3
Pages
030503-030503
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
OpenAlex
W2884175209
Cited by
118
References
71
Citations by year
2026: 8 · 2025: 11 · 2024: 9 · 2023: 19 · 2022: 21 · 2021: 24 · 2020: 22 · 2019: 4
FWCI
8.10
Type
journal article
Language
en
Open access
Locations
  • Physical Review Letters (publishedVersion)
  • arXiv (Cornell University) (publishedVersion)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • U.S. Department of Energy (DE-NA0003525)
  • Office of the Director of National Intelligence
  • Intelligence Advanced Research Projects Activity
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
Keywords
randomized benchmarking, gate error rates, IBM Quantum Experience, quantum hardware characterization, exponential decay

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