Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center for Computing Research
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of Maryland and National Institute of Standards and Technology, College Park, MD (United States)
Quantum information processors promise fast algorithms for problems inaccessible to classical computers. But since qubits are noisy and error-prone, they will depend on fault-tolerant quantum error correction (FTQEC) to compute reliably. Quantum error correction can protect against general noise if—and only if—the error in each physical qubit operation is smaller than a certain threshold. The threshold for general errors is quantified by their diamond norm. Until now, qubits have been assessed primarily by randomized benchmarking, which reports a different error rate that is not sensitive to all errors, and cannot be compared directly to diamond norm thresholds. Finally, we use gate set tomography to completely characterize operations on a trapped-Yb+-ion qubit and demonstrate with greater than 95% confidence that they satisfy a rigorous threshold for FTQEC (diamond norm ≤6.7 × 10-4).
Blume-Kohout, Robin, et al. "Demonstration of qubit operations below a rigorous fault tolerance threshold with gate set tomography." Nature Communications, vol. 8, Feb. 2017. https://doi.org/10.1038/ncomms14485
Blume-Kohout, Robin, Gamble, John King, Nielsen, Erik, et al., "Demonstration of qubit operations below a rigorous fault tolerance threshold with gate set tomography," Nature Communications 8 (2017), https://doi.org/10.1038/ncomms14485
@article{osti_1323885,
author = {Blume-Kohout, Robin and Gamble, John King and Nielsen, Erik and Rudinger, Kenneth and Mizrahi, Jonathan and Fortier, Kevin and Maunz, Peter},
title = {Demonstration of qubit operations below a rigorous fault tolerance threshold with gate set tomography},
annote = {Quantum information processors promise fast algorithms for problems inaccessible to classical computers. But since qubits are noisy and error-prone, they will depend on fault-tolerant quantum error correction (FTQEC) to compute reliably. Quantum error correction can protect against general noise if—and only if—the error in each physical qubit operation is smaller than a certain threshold. The threshold for general errors is quantified by their diamond norm. Until now, qubits have been assessed primarily by randomized benchmarking, which reports a different error rate that is not sensitive to all errors, and cannot be compared directly to diamond norm thresholds. Finally, we use gate set tomography to completely characterize operations on a trapped-Yb+-ion qubit and demonstrate with greater than 95% confidence that they satisfy a rigorous threshold for FTQEC (diamond norm ≤6.7 × 10-4).},
doi = {10.1038/ncomms14485},
url = {https://www.osti.gov/biblio/1323885},
journal = {Nature Communications},
issn = {ISSN 2041-1723},
volume = {8},
place = {United States},
publisher = {Nature Publishing Group},
year = {2017},
month = {02}}
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Laboratory Directed Research and Development (LDRD) Program; Intelligence Advanced Research Projects Activity (IARPA) (United States)