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

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

Research output: Contribution to journalArticlepeer-review

128 Scopus citations


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 singleand two-qubit control fidelities exceeding 99%. The operation of the quantum processor is quantitatively characterized using gate set tomography and randomized benchmarking. Our results highlight the potential of silicon spin qubits to become a dominant technology in the development of intermediate-scale quantum processors.

Original languageEnglish (US)
Article numberabn5130
JournalScience Advances
Issue number14
StatePublished - Apr 2022

All Science Journal Classification (ASJC) codes

  • General


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