SurfaceCounting

Photon-number-resolving receivers, and the rate none of them reaches

9/9 passed in 75ms

Test	What it does	Result
test_array_click	At one element the array's click outcome is click_prob, the threshold law, to 1e-15.	✅ pass
test_array_complete	A multiplexed array's POVM sums to the identity on its truncated space and carries no negative diagonal entry.	✅ pass
test_array_distinct	distinct(n), the array's fidelity to true number resolution, is 1 at one photon, falls with $n$, and is exactly 0 once $n$ passes the element count.	✅ pass
test_array_folds	The array's closed-form outcome distribution agrees to 1e-14 with folding its own POVM against a Poisson photon-number distribution.	✅ pass
test_counting_domains	Both counting receivers refuse an out-of-range efficiency, dark rate, element count, background and readout width, naming the parameter refused.	✅ pass
test_counting_refused	q.Link refuses both counting receivers by name: every bound it ships over a counting receiver is written on a binary click.	✅ pass
test_names_shipped	PnrDetector, ThresholdArray, TransmittedLO and ShotNoise are in __all__ and present on the package.	✅ pass
test_number_absorbs	The number-resolving readout's POVM sums to the identity, absorbing at the top, and a zero readout width gives the identity confusion matrix.	✅ pass
test_number_widens	A finite readout width moves mass off the diagonal of the confusion matrix while every column still sums to one.	✅ pass