A fluorescence threshold source scan checks each row's photon count against its own threshold, so the result bit must agree with the comparison. The three rows give counts 6, 12, and 16 against thresholds 8, 12, and 14, yielding result bits 0, 1, and 1 exactly for the stated toy readout ledger; real fluorescence readout depends on collection efficiency, threshold choice, background counts, state-preparation error, and finite-shot uncertainty.
Photon counts are compared with source thresholds. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
Photon count is compared with the displayed threshold
The source state, count, and threshold are checked together. The result bit must agree with the threshold comparison.
6<8⇒bresult=0
Photon count is compared with the displayed threshold
The source state, count, and threshold are checked together. The result bit must agree with the threshold comparison.
12≥12⇒bresult=1
Photon count is compared with the displayed threshold
The source state, count, and threshold are checked together. The result bit must agree with the threshold comparison.
16≥14⇒bresult=1
The equality row is bright under the checked rule
Each row compares its displayed count with its displayed threshold. The result bits are shown in the table and checked in the diagram.