skip to main content
Language:
Search Limited to: Search Limited to: Resource type Show Results with: Show Results with: Search type Index

Quantum logic with spin qubits crossing the surface code threshold

Nature (London), 2022-01, Vol.601 (7893), p.343-347 [Peer Reviewed Journal]

2022. The Author(s). ;Copyright Nature Publishing Group Jan 20, 2022 ;The Author(s) 2022 ;ISSN: 0028-0836 ;EISSN: 1476-4687 ;DOI: 10.1038/s41586-021-04273-w ;PMID: 35046604

Full text available

Citations Cited by
  • Title:
    Quantum logic with spin qubits crossing the surface code threshold
  • Author: Xue, Xiao ; Russ, Maximilian ; Samkharadze, Nodar ; Undseth, Brennan ; Sammak, Amir ; Scappucci, Giordano ; Vandersypen, Lieven M K
  • Subjects: Accuracy ; Algorithms ; Crosstalk ; Errors ; Fault tolerance ; Fidelity ; Magnetic fields ; Microprocessors ; Quantum dots ; Qubits (quantum computing) ; Silicon ; Tomography
  • Is Part Of: Nature (London), 2022-01, Vol.601 (7893), p.343-347
  • Description: High-fidelity control of quantum bits is paramount for the reliable execution of quantum algorithms and for achieving fault tolerance-the ability to correct errors faster than they occur . The central requirement for fault tolerance is expressed in terms of an error threshold. Whereas the actual threshold depends on many details, a common target is the approximately 1% error threshold of the well-known surface code . Reaching two-qubit gate fidelities above 99% has been a long-standing major goal for semiconductor spin qubits. These qubits are promising for scaling, as they can leverage advanced semiconductor technology . Here we report a spin-based quantum processor in silicon with single-qubit and two-qubit gate fidelities, all of which are above 99.5%, extracted from gate-set tomography. The average single-qubit gate fidelities remain above 99% when including crosstalk and idling errors on the neighbouring qubit. Using this high-fidelity gate set, we execute the demanding task of calculating molecular ground-state energies using a variational quantum eigensolver algorithm . Having surpassed the 99% barrier for the two-qubit gate fidelity, semiconductor qubits are well positioned on the path to fault tolerance and to possible applications in the era of noisy intermediate-scale quantum devices.
  • Publisher: England: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 0028-0836
    EISSN: 1476-4687
    DOI: 10.1038/s41586-021-04273-w
    PMID: 35046604
  • Source: ProQuest One Psychology
    ProQuest Central
Back to results list
INSPIRE LIBRARY - TON DUC THANG UNIVERSITY (84-028) 37 755 057 Feedback
19 Nguyen Huu Tho St. Dist.7, HCM thuvien@tdtu.edu.vn

Copyright © 2017 INSPIRE LIBRARY - TON DUC THANG UNIVERSITY

Searching Remote Databases, Please Wait