Tunable Coupling Scheme for Implementing High-Fidelity Two-Qubit Gates
Open accessAbstract
Superconducting qubits now offer coherence times exceeding 100 $\ensuremath{\mu}$s and single-qubit gate fidelities above 99.9%, but realizing a large-scale quantum computer is still impeded by the quality of two-qubit gates, with typical fidelities of 95--99%. Here a simple, broadly applicable scheme to improve two-qubit gates using a tunable coupler is proposed. It simplifies the coupling scheme, and reduces unwanted interactions typically present in schemes in which the interactions are always on. Numerical simulations show that this approach should allow two-qubit gate fidelities greater than 99.9%, when implemented using state-of-the-art superconducting qubits.
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CMOS Integrated Circuits for the Quantum Information Sciences
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- Authors
- Yan, F., Krantz, P., Sung, Y., Kjaergaard, M., Campbell, D. L., Orlando, T. P., Gustavsson, S., & Oliver, W. D.
- Affiliations
- Massachusetts Institute of Technology (US)
- MIT Lincoln Laboratory (US)
- Venue
- Physical Review Applied
- Publisher
- American Physical Society (APS)
- Published
- 2018-11-28
- Volume
- 10
- Issue
- 5
- ISSN
- 2331-7019 (ISSN-L)
- OpenAlex
- W2795017070
- Semantic Scholar
- 3225efdc2f3eb147caac32f68fcdaac65ee01c1f
- Cited by
- 423
- References
- 37
- Citations by year
- 2026: 55 · 2025: 84 · 2024: 68 · 2023: 87 · 2022: 43 · 2021: 55 · 2020: 25 · 2019: 6
- FWCI
- 11.94
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- Locations
- Physical Review Applied (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc)
- Chalmers Research (Chalmers University of Technology) (submittedVersion)
- arXiv (Cornell University)
- Physical Review Letters
- Funders
- MIT Lincoln Laboratory (FA8721-05-C-0002)
- Army Research Office
- National Science Foundation
- Topics
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Information and Cryptography
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Superconducting and THz Device Technology
- Physical Sciences › Computer Science › Artificial Intelligence › Quantum Computing Algorithms and Architecture
- Keywords
- tunable coupler, two-qubit gates, gate fidelity, superconducting qubits, quantum computing
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