Fig. 5: PAPA experimental data flow.
From: Bootstrapping quantum process tomography via a perturbative ansatz
a GST experiments are interleaved by pair and spectator qubit state and sent to the BBN Arbitrary Pulse Sequencers (APS2)59. Gate instructions are converted to control pulses and sent to the five-qubit device. Demodulated readout signals are first amplified by HEMTs, JPAs and JPCs then digitized into qubit state information with custom firmware running on an X6-1000M digitizer card. This data is then passed to pyGSTi and reconstructed in parallel using Google Cloud Compute services. The three separate reconstructions are then passed to the PAPA algorithm for bootstrapping to three-qubit processes. b A notional diagram of the IBM five-qubit device used in the experiment. The location of the {Q1, Q2, Q3} subset is specified in red. Lines denote static capacitive coupling through CPW resonators.
