Figure 17

Results of VQE. (a) The VQE energy with respect to each iteration on different quantum platforms and simulation. The blue dot line represents the experimental result on SpinQ Gemini. The purple dot line reperents the CNOT error mitigated (CEM) result on SpinQ Gemini. The red triangle line represents the numerical simulation without gate errors. The green square line represents the experimental result on IBM Q Yorktown. The gray square line represents the readout error mitigated (REM) result on IBM Q Yorktown. (b) Numerical simulation for quantum circuit in VQE experiment. The blue dot line represents the experimental result on SpinQ Gemini. The purple dot line reperents the CNOT error mitigated result on SpinQ Gemini. The orange triangle line represents the energy calculate by the noisy circuit with the SpinQ Gemini experimental parameters. The brown square line represents the energy calculate by the ideal circuit with the SpinQ Gemini experimental parameters