Two-qubit silicon quantum processor with operation fidelity exceeding 99.
basic_science · Level V
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- Record sourced from PubMed, PMID 35385308.
- Also identified by DOI 10.1126/sciadv.abn5130 and PMC identifier 8986105.
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Abstract
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. Our results highlight the potential of silicon spin qubits to become a dominant technology in the development of intermediate-scale quantum processors.