An entanglement-based volumetric benchmark for near-term quantum hardware

ORAL

Abstract

We introduce a volumetric benchmark for near-term quantum platforms based on the generation and verification of genuine entanglement across n-qubits using graph states and direct stabilizer measurements. Our benchmark evaluates the robustness of multipartite and bipartite n-qubit entanglement with respect to many sources of hardware noise: qubit decoherence, CNOT and swap gate noise, and readout error. We demonstrate our benchmark on multiple superconducting qubit platforms available from IBM (ibmq_belem, ibmq_toronto, ibmq_guadalupe and ibmq_jakarta). Subsets of n < 10 qubits are used for graph state preparation and stabilizer measurement. Evaluation of genuine and biseparable entanglement witnesses we report observations of 5 qubit genuine entanglement, but robust multipartite entanglement is difficult to generate for n > 4 qubits and identify two-qubit gate noise as strongly correlated with the quality of genuine multipartite entanglement.

*This research was supported in part as part of the ASCR Testbed Pathfinder Program at Oak Ridge Na- tional Laboratory under FWP ERKJ332 (K.E.H., T. M., K.Y.A., A.F., and R. C. P.). The software development and testing (H. C. and M. K.) was supported in part by the U.S. Department of Energy, Office of Science, Office of Workforce Development for Teachers and Scientists (WDTS) under the Science Undergraduate Laboratory Internship program. A.F. and A.F.K were supported by the National Science Foundation under Grant No. NSF DMR-1752713 (for planning, formal development, and software development) and by the ASCR Testbed Pathfinder Program (data interpretation and manuscript writing). K.Y.A. was supported by MITRE Corporation TechHire and Quantum Horizon programs during data collection and manuscript writing. This research used quantum computing system re- sources of the Oak Ridge Leadership Computing Facility, which is a DOE Office of Science User Facility supported under Contract DE-AC05-00OR22725. Oak Ridge National Laboratory manages access to the IBM Q System as part of the IBM Q Network.

–

Presenters

  • Kathleen Hamilton

    • Oak Ridge National Laboratory

Authors

  • Kathleen Hamilton

    • Oak Ridge National Laboratory

  • Nouamane Laanait

    • Carelon Digital Platforms

  • Akhil Francis

    • North Carolina State University

  • Sophia Economou

    • Virginia Tech
    • VirginiaTech

  • George Barron

    • Virginia Tech

  • Kubra Yeter-Aydeniz

    • Mitre Corp
    • MITRE

  • Titus Morris

    • Oak Ridge National Laboratory

  • Harrison Cooley

    • Georgetown University

  • Muhun Kang

    • Cornell University

  • Raphael Pooser

    • ORNL
    • Oak Ridge National Laboratory