Two-qubit silicon quantum processor with operation fidelity exceeding 99%

Mills, Adam R.; Guinn, Charles R.; Gullans, Michael J.; Sigillito, Anthony J.; Feldman, Mayer M.; Nielsen, Erik; Petta, Jason R.

doi:10.1126/sciadv.abn5130

Two-qubit silicon quantum processor with operation fidelity exceeding 99%

Journal Article · Wed Apr 06 00:00:00 EDT 2022 · Science Advances

DOI:https://doi.org/10.1126/sciadv.abn5130· OSTI ID:1870503

^[1]; Guinn, Charles R. ^[1]; ^[2]; ^[1]; ^[1]; ^[3]; ^[1]

Princeton Univ., NJ (United States)
Princeton Univ., NJ (United States); Univ. of Maryland, College Park, MD (United States)
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Silicon spin qubits satisfy the necessary criteria for quantum information processing. However, a demonstration of high-fidelity state preparation and readout combined with high-fidelity single- and two-qubit gates, all of which must be present for quantum error correction, has been lacking. We use a two-qubit Si/SiGe quantum processor to demonstrate state preparation and readout with fidelity greater than 97%, combined with both single- and two-qubit control fidelities exceeding 99%. The operation of the quantum processor is quantitatively characterized using gate set tomography and randomized benchmarking. Finally, our results highlight the potential of silicon spin qubits to become a dominant technology in the development of intermediate-scale quantum processors.

View Accepted Manuscript (DOE)

Research Organization:: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)

Grant/Contract Number:: NA0003525

OSTI ID:: 1870503

Report Number(s):: SAND2022-5046J; 705227

Journal Information:: Science Advances, Journal Name: Science Advances Journal Issue: 14 Vol. 8; ISSN 2375-2548

Publisher:: AAASCopyright Statement

Country of Publication:: United States

Language:: English

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