Journal article

Benchmarking a high-fidelity mixed-species entangling gate

Abstract:: We implement a two-qubit logic gate between a 43Ca+ hyperfine qubit and a 88Sr+ Zeeman qubit. For this pair of ion species, the S–P optical transitions are close enough that a single laser of wavelength 402 nm can be used to drive the gate but sufficiently well separated to give good spectral isolation and low photon scattering errors. We characterize the gate by full randomized benchmarking, gate set tomography, and Bell state analysis. The latter method gives a fidelity of 99.8(1)%, comparable to that of the best same-species gates and consistent with known sources of error.

Publication status:: Published

Peer review status:: Peer reviewed

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APA Style

Hughes, A. C., Schäfer, V. M., Thirumalai, K., Nadlinger, D. P., Woodrow, S. R., Lucas, D. M., & Ballance, C. J. (2020). Benchmarking a high-fidelity mixed-species entangling gate. Physical Review Letters, 125(8).

MLA Style

Hughes, A. C., et al. “Benchmarking a High-Fidelity Mixed-Species Entangling Gate.” Physical Review Letters, vol. 125, no. 8, American Physical Society, 2020.

Chicago Style

Hughes, AC, VM Schäfer, K Thirumalai, DP Nadlinger, SR Woodrow, DM Lucas, and CJ Ballance. 2020. “Benchmarking a High-Fidelity Mixed-Species Entangling Gate.” Physical Review Letters 125 (8).
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Files:: Hughes_et_al_2020_Benchmarking_high_fidelity.pdf

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Publisher copy:: 10.1103/PhysRevLett.125.080504

Authors

+ Hughes, AC More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Sub department:: Atomic & Laser Physics
Oxford college:: Oriel College
Role:: Author

+ Schäfer, VM More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Sub department:: Atmos Ocean & Planet Physics
Role:: Author

+ Thirumalai, K More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Sub department:: Atomic & Laser Physics
Role:: Author
ORCID:: 0000-0001-6399-0011

+ Nadlinger, DP More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Physics
Sub department:: Atomic & Laser Physics
Role:: Author

+ Woodrow, SR More by this author

Role:: Author

More authors...

+ European Commission More from this funder

Grant:: 820495

+ Engineering & Physical Sciences Research Council More from this funder

Grant:: EP/M013243/1

Publisher:: American Physical Society
Journal:: Physical Review Letters More from this journal
Volume:: 125
Issue:: 8
Article number:: 080504
Publication date:: 2020-08-18
Acceptance date:: 2020-07-08
DOI:: 10.1103/PhysRevLett.125.080504
EISSN:: 1079-7114
ISSN:: 0031-9007

Language:: English
Keywords:: FFR
Pubs id:: 1123382
Local pid:: pubs:1123382
Deposit date:: 2020-08-03

Terms of use

Copyright holder:: American Physical Society
Copyright date:: 2020
Rights statement:: © 2020 American Physical Society.

Licence:: Terms and Conditions of Use for Oxford University Research Archive

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