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I am attempting to implement an experiment to investigate the qubit flux dependence of a flux-tunable transmon.

I am using the following OPENQASM code:

OPENQASM 3.0;
cal {
    bit[1] psb;
    waveform NYKJPaXjZm = {{0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}, {0.01}};
    waveform JALcwYUwFE = gaussian(100.0ns, 25.0ns, 0.1, true);
    set_phase(Transmon_77_charge_tx, 0.0);
    play(Transmon_77_flux_tx_c0, NYKJPaXjZm);
    delay[100.0ns] Transmon_77_charge_tx;
    set_frequency(Transmon_77_charge_tx, 4822177211.716727);
    play(Transmon_77_charge_tx, JALcwYUwFE);
    psb[0] = capture_v0(Transmon_77_readout_rx);
}

Can anyone confirm whether the measurement procedure (capture_v0) occurs while the flux pulse is active?

This is my full code for just one Flux amplitude:

import matplotlib.pyplot as plt

Imports for function fitting


import numpy as np
import scipy.optimize
from scipy.fft import fft, fftfreq


from braket.aws import AwsDevice
from braket.devices import Devices
from braket.parametric import FreeParameter
from braket.pulse import GaussianWaveform, PulseSequence,ArbitraryWaveform


device_name = "ankaa"
qubit_idx = 77


flux_amps =[0.01]


experiment_configuration = {
    "ankaa": {
        "device_arn": 'arn:aws:braket:us-west-1::device/qpu/rigetti/Ankaa-3',
        "qubit": qubit_idx,
        "drive_frame": f"Transmon_{qubit_idx}charge_tx",
        "readout_frame": f"Transmon{qubit_idx}readout_rx",
        "flux_frame": f"Transmon{qubit_idx}_flux_tx_c0",
        "flux_waveform": ArbitraryWaveform([flux_amps] * 600),
        "spectroscopy_wf": GaussianWaveform(100e-9, 25e-9, 0.1, True),
        "rabi_wf": GaussianWaveform(
            FreeParameter("length"),
            FreeParameter("length") * 0.25,
            0.2,
            True,
        ),
    },
}


device = AwsDevice(experiment_configuration[device_name]["device_arn"])
qubit = experiment_configuration[device_name]["qubit"]
drive_frame = device.frames[experiment_configuration[device_name]["drive_frame"]]
flux_frame = device.frames[experiment_configuration[device_name]["flux_frame"]]
readout_frame = device.frames[experiment_configuration[device_name]["readout_frame"]]


drive_waveform = experiment_configuration[device_name]["spectroscopy_wf"]
flux_waveform = experiment_configuration[device_name]["flux_waveform"]


frequency = FreeParameter("frequency")


pulse_sequence = (
    PulseSequence()
    .set_phase(drive_frame, 0.0)
    .play(flux_frame, flux_waveform)
    .delay(drive_frame, duration=100e-9)
    .set_frequency(drive_frame, frequency)
    .play(drive_frame, drive_waveform)
    .capture_v0(readout_frame)
)


span = 75e6
N_steps = 25
N_shots = 100
frequencies = np.linspace(
    drive_frame.frequency - span / 2,
    drive_frame.frequency + span / 2,
    N_steps,
)


qubit_spectroscopy_sequences = [pulse_sequence(frequency=frequency) for frequency in frequencies]


aaa =qubit_spectroscopy_sequences[0].to_ir()


print(aaa)


#batch = device.run_batch(qubit_spectroscopy_sequences, shots=N_shots)
rexyquantum
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0 Answers0