plot_num_qwc_groups

plot_num_qwc_groups(metadata, axes)

Plot the number of qubit-wise commuting Pauli groups.

This method populates the provided figure axes with a line-plot of the number of qubit-wise commuting Pauli groups at each backpropagated slice. Below is an example where we plot some metadata which exists within our context.

>>> from matplotlib import pyplot as plt
>>> from qiskit_addon_obp.utils.visualization import plot_num_qwc_groups
>>> fig, axes = plt.subplots(1, 1)
>>> plot_num_qwc_groups(metadata, axes)

Fig. 24 (png, hires.png, pdf)

Fig. 25 (png, hires.png, pdf)

Fig. 26 (png, hires.png, pdf)

Fig. 27 (png, hires.png, pdf)

As you can see in the figure above, the number of backpropagated slices is displayed along the x-axis. You can think of this as the “time” of the backpropagation algorithm. The number of qubit-wise commuting Pauli groups at each backpropagation step is displayed along the y-axis. If OBPMetadata.operator_budget.max_qwc_groups is not None, it is displayed as a red horizontal line.

Parameters:

• metadata (OBPMetadata) – the metadata to be visualized.

• axes (Axes) – the matplotlib axes in which to plot.