Dataset for Sampling hard circuits with verifiably high fidelity

This is the dataset for the preprint "Sampling hard circuits with verifiably high fidelity". The raw bit arrays for each experiment are obtained directly from Qiskit and are otherwise unaltered: File Name File types Memory (uncompressed) Experiment 1 experiment1.zip 11 npy files, 3 csv files 14.45 GB Experiment 2 experiment2.zip 11 npy files, 3 csv files 22.27 GB Experiment 3 experiment3.zip 11 npy files, 3 csv files 2.04 GB The numpy version is v2.3.4. The notebook experiment_analysis.ipynb shows how to process the experiment data once unzipped and calculate the fidelity with direct fidelity estimation (DFE), as presented in main text of the paper and in Table S1 in the supplementary. It also shows how to calculate the linear cross-entropy benchmarking score (XEB), which can be loaded from the folder below. The xeb_data folder contains: File name Description Experiment 1 experiment1_468T_xeb_bitstrings.npy 2051 bitstrings (Qiskit endianness) for the doped 70 X 70 circuit with 468 T gates. Bitflip correction from readout mitigation is applied. Experiment 2 experiment2_468T_xeb_bitstrings.npy 2025 bitstrings (Qiskit endianness) for the doped 70 X 70 circuit with 468 T gates. Bitflip correction from readout mitigation is applied. Experiment 2 experiment2_75T_xeb_bitstrings.npy 1995 bitstrings (Qiskit endianness) for the doped 70 X 70 circuit with 75 T gates. Bitflip correction from readout mitigation is applied. Experiment 2 experiment2_75T_xeb_amplitudes.npy 1995 classically simulated amplitudes (same order as the bitstrings above) for the doped 70 X 70 circuit with 75 T gates. These are used to calculate XEB. The qasm_circuits folder contains the doped Clifford circuits that we claim will be difficult to simulate, as well as circuits in Experiment 2 which can be simulated and used to calculate DFE (for the 5 T gate case) and XEB (for the 75 T gate case): File name Doped 70 X 70 circuit with 468 T gates nq70_depth70_checks27_doped.qasm Doped 70 X 70 circuit with 468 T gates (and 27 ancilla checks) nq70_depth70_checks27_doped_checks.qasm Doped 70 X 70 circuit with 5 T gates (Experiment 2) nq70_depth70_checks27_doped_5T.qasm Doped 70 X 70 circuit with 5 T gates (Experiment 2, and 27 ancilla checks) nq70_depth70_checks27_doped_5T_checks.qasm Doped 70 X 70 circuit with 75 T gates (Experiment 2) nq70_depth70_checks27_doped_75T.qasm Doped 70 X 70 circuit with 75 T gates (Experiment 2, and 27 ancilla checks) nq70_depth70_checks27_doped_75T_checks.qasm The experiment_execution_spans folder contains, for each experiment subfolder, a nested set of subfolders for each subjob, which contains start times, stop times, and durations for the readout twirl cal (ro_twirl_cal) and the actual fidelity experiment. It also contains qpu_usage.csv, a csv containing the QPU usage times (in seconds) for each subjob.