Cited by 49Quantum Computing Algorithms and ArchitectureQuantum many-body systemsQuantum Information and Cryptography

Quantifying the effects of local many-qubit errors and nonlocal two-qubit errors on the surface code

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Fowler, Austin G., Martinis, John M.·2014·Physical Review A

Abstract

Topological quantum error correction codes are known to be able to tolerate arbitrary local errors given sufficient qubits. This includes correlated errors involving many local qubits. In this work, we quantify this level of tolerance, numerically studying the effects of many-qubit errors on the performance of the surface code. We find that if increasingly large-area errors are at least moderately exponentially suppressed, arbitrarily reliable quantum computation can still be achieved with practical overhead. We furthermore quantify the effect of nonlocal two-qubit correlated errors, which would be expected in arrays of qubits coupled by a polynomially decaying interaction, and when using many-qubit coupling devices. We surprisingly find that the surface code is very robust to this class of errors, despite a provable lack of a threshold error rate when such errors are present.

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Authors
Fowler, A. G., & Martinis, J. M.
Affiliations
University of California, Santa Barbara (US)
Venue
Physical Review A
Published
2014-03-12
Volume
89
Issue
3
ISSN
  • 0556-2791 (ISSN-L)
  • 1050-2947
  • 1094-1622
OpenAlex
W2143142748
Cited by
49
References
14
Citations by year
2026: 1 · 2025: 9 · 2024: 3 · 2023: 5 · 2022: 2 · 2021: 7 · 2020: 1 · 2019: 4 · 2018: 2 · 2017: 2 · 2016: 4 · 2015: 5 · 2014: 4
FWCI
4.99
Type
journal article
Language
en
Open access
Locations
  • Physical Review A (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
  • Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum many-body systems
  • Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
Keywords
surface code, topological quantum error correction, correlated errors, error tolerance, error threshold, qubit coupling, fault tolerance

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