2022/09/01 by Kathleen E. Hamilton, Hamilton, Kathleen E., Nouamane Laanait +19
Physics and Astronomy · #FOS: Physical sciences #Quantum Physics (quant-ph) #quant-ph
paper · pdf · doi:10.48550/arxiv.2209.00678
21 pages, 17 figures
arxiv created 2022/09/01 · arxiv updated 2022/09/05
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 (ibmqbelem, ibmqtoronto, ibmqguadalupe and ibmqjakarta). 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.