Demonstration of a quantum error detection code using a square lattice of four superconducting qubits
10.1038/ncomms7979
Crossref journal-article
Springer Science and Business Media LLC
Nature Communications (297)
Abstract

AbstractThe ability to detect and deal with errors when manipulating quantum systems is a fundamental requirement for fault-tolerant quantum computing. Unlike classical bits that are subject to only digital bit-flip errors, quantum bits are susceptible to a much larger spectrum of errors, for which any complete quantum error-correcting code must account. Whilst classical bit-flip detection can be realized via a linear array of qubits, a general fault-tolerant quantum error-correcting code requires extending into a higher-dimensional lattice. Here we present a quantum error detection protocol on a two-by-two planar lattice of superconducting qubits. The protocol detects an arbitrary quantum error on an encoded two-qubit entangled state via quantum non-demolition parity measurements on another pair of error syndrome qubits. This result represents a building block towards larger lattices amenable to fault-tolerant quantum error correction architectures such as the surface code.

Bibliography

Córcoles, A. D., Magesan, E., Srinivasan, S. J., Cross, A. W., Steffen, M., Gambetta, J. M., & Chow, J. M. (2015). Demonstration of a quantum error detection code using a square lattice of four superconducting qubits. Nature Communications, 6(1).

Authors 7
  1. A.D. Córcoles (first)
  2. Easwar Magesan (additional)
  3. Srikanth J. Srinivasan (additional)
  4. Andrew W. Cross (additional)
  5. M. Steffen (additional)
  6. Jay M. Gambetta (additional)
  7. Jerry M. Chow (additional)
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Dates
Type When
Created 10 years, 3 months ago (April 29, 2015, 9:24 a.m.)
Deposited 2 years, 7 months ago (Jan. 5, 2023, 6:43 a.m.)
Indexed 3 days, 11 hours ago (Aug. 22, 2025, 12:53 a.m.)
Issued 10 years, 3 months ago (April 29, 2015)
Published 10 years, 3 months ago (April 29, 2015)
Published Online 10 years, 3 months ago (April 29, 2015)
Funders 0

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@article{C_rcoles_2015, title={Demonstration of a quantum error detection code using a square lattice of four superconducting qubits}, volume={6}, ISSN={2041-1723}, url={http://dx.doi.org/10.1038/ncomms7979}, DOI={10.1038/ncomms7979}, number={1}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Córcoles, A.D. and Magesan, Easwar and Srinivasan, Srikanth J. and Cross, Andrew W. and Steffen, M. and Gambetta, Jay M. and Chow, Jerry M.}, year={2015}, month=apr }