Tunable Coupling Scheme for Implementing High-Fidelity Two-Qubit Gates
Name
PhysRevApplied.10.054062.pdf
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454.22 KB
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Checksum (MD5)
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Author(s)
Yan, Fei
Krantz, Philip Johan Erik
Sung, Youngkyu
Kjaergaard, Morten
Campbell, Daniel Lawrence
Orlando, Terry Philip
Gustavsson, Simon
Oliver, William D
Date Issued
November 2018
Journal
Physical Review Applied
Publisher
American Physical Society
Citation
Yan, Fei, et al. “Tunable Coupling Scheme for Implementing High-Fidelity Two-Qubit Gates.” Physical Review Applied, vol. 10, no. 5, Nov. 2018.
Version
Final published version
Abstract
The prospect of computational hardware with quantum advantage relies critically on the quality of quantum-gate operations. Imperfect two-qubit gates are a major bottleneck for achieving scalable quantum-information processors. Here, we propose a generalizable and extensible scheme for a two-qubit tunable coupler that controls the qubit-qubit coupling by modulating the coupler frequency. Two-qubit gate operations can be implemented by operating the coupler in the dispersive regime, which is noninvasive to the qubit states. We investigate the performance of the scheme by simulating a universal two-qubit gate on a superconducting quantum circuit, and find that errors from known parasitic effects are strongly suppressed. The scheme is compatible with existing high-coherence hardware, thereby promising a higher gate fidelity with current technologies.
MIT Department
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevApplied.10.054062
