Representation module

QdcEm.Representation — Plotting utilities and custom circuit display styles for reproducing the paper figures.

Circuit display style

The module defines a custom Qiskit circuit style that colour-codes the two CM gate types, matching the convention used throughout the paper:

Gate label	Display text	Fill colour	Text colour
`U_T`	Û_T	Purple (`#b266ff`)	Black
`U_F`	Û_F	Dark green (`#228B22`)	White

Pass the style dictionary to qc.draw('mpl', style=style) to match the circuit diagrams in the paper:

from QdcEm.Representation import style
qc.draw('mpl', style=style)

plot_normalized_results

plot_normalized_results(results, plot_type, state, shots, kappa_T)

Plots the measured success probability of a remote CNOT gate versus fiber communication steps, reproducing Figure 5 of the paper. The x-axis begins with a monolithic reference point M (no inter-QPU noise) followed by steps 1–10. Four curves are shown — G-652-D, G-654-E, G-655-D, and a numerical (AerSimulator) reference.

Parameters

Name	Type	Description
`results`	`dict`	Keys are fiber-type labels (`'G-652-D'`, `'G-654-E'`, `'G-655-D'`, `'Numerical'`). Values are lists of raw success counts; the first element is the monolithic (M) result.
`plot_type`	`str`	Protocol label shown in the figure title, e.g. `'Cat-Comm'` or `'TP1'`.
`state`	`int` or `str`	Initial state of the control qubit (0 or 1).
`shots`	`int`	Total measurement shots per data point; used for normalisation.
`kappa_T`	`float`	Transducer coupling constant used in this experiment.