articleScience AdvancesApr 6, 2022GOLD OA

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

AMAdam MillsCGCharles GuinnMJMichael J. GullansAJA. J. SigillitoMMMayer M. Feldman

Princeton University · Joint Center for Quantum Information and Computer Science · +2 more institutions

PubMed
Indexed inarxivcrossrefdoajpubmed

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…

Citation impact

317
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FWCI
46.01
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100%
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45
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Authors

7

Topics & keywords

Topics
Keywords
  • Qubit
  • Fidelity
  • Quantum computer
  • Computer science
  • High fidelity
  • Silicon
  • State (computer science)
  • Quantum
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