Process verification of two-qubit quantum gates by randomized benchmarking

A. D. Córcoles, Jay M. Gambetta, Jerry M. Chow, John A. Smolin, Matthew Ware, Joel Strand, Britton Plourde, M. Steffen

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

We implement a complete randomized benchmarking protocol on a system of two superconducting qubits. The protocol consists of randomizing over gates in the Clifford group, which experimentally are generated via an improved two-qubit cross-resonance gate implementation and single-qubit unitaries. From this we extract an optimal average error per Clifford operation of 0.0936. We also perform an interleaved experiment, alternating our optimal two-qubit gate with random two-qubit Clifford gates, to obtain a two-qubit gate error of 0.0653. We compare these values with a two-qubit gate error of ∼0.12 obtained from quantum process tomography, which is likely limited by state preparation and measurement errors.

Original languageEnglish (US)
Article number030301
JournalPhysical Review A
Volume87
Issue number3
DOIs
StatePublished - Mar 19 2013

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tomography
preparation

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Córcoles, A. D., Gambetta, J. M., Chow, J. M., Smolin, J. A., Ware, M., Strand, J., ... Steffen, M. (2013). Process verification of two-qubit quantum gates by randomized benchmarking. Physical Review A, 87(3), [030301]. https://doi.org/10.1103/PhysRevA.87.030301

Process verification of two-qubit quantum gates by randomized benchmarking. / Córcoles, A. D.; Gambetta, Jay M.; Chow, Jerry M.; Smolin, John A.; Ware, Matthew; Strand, Joel; Plourde, Britton; Steffen, M.

In: Physical Review A, Vol. 87, No. 3, 030301, 19.03.2013.

Research output: Contribution to journalArticle

Córcoles, AD, Gambetta, JM, Chow, JM, Smolin, JA, Ware, M, Strand, J, Plourde, B & Steffen, M 2013, 'Process verification of two-qubit quantum gates by randomized benchmarking', Physical Review A, vol. 87, no. 3, 030301. https://doi.org/10.1103/PhysRevA.87.030301
Córcoles AD, Gambetta JM, Chow JM, Smolin JA, Ware M, Strand J et al. Process verification of two-qubit quantum gates by randomized benchmarking. Physical Review A. 2013 Mar 19;87(3). 030301. https://doi.org/10.1103/PhysRevA.87.030301
Córcoles, A. D. ; Gambetta, Jay M. ; Chow, Jerry M. ; Smolin, John A. ; Ware, Matthew ; Strand, Joel ; Plourde, Britton ; Steffen, M. / Process verification of two-qubit quantum gates by randomized benchmarking. In: Physical Review A. 2013 ; Vol. 87, No. 3.
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