Fig. 6: Histogram of ion-fluorescence counts in Alice for qubit state prepared in \(| \downarrow \left.\right\rangle\) (bright) and \(| \uparrow \left.\right\rangle\) (dark). | Nature Communications

Fig. 6: Histogram of ion-fluorescence counts in Alice for qubit state prepared in \(| \downarrow \left.\right\rangle\) (bright) and \(| \uparrow \left.\right\rangle\) (dark).

From: High-fidelity remote entanglement of trapped atoms mediated by time-bin photons

Fig. 6: Histogram of ion-fluorescence counts in Alice for qubit state prepared in $$| \downarrow \left.\right\rangle$$ ∣ ↓ (bright) and $$| \uparrow \left.\right\rangle$$ ∣ ↑ (dark).The alt text for this image may have been generated using AI.

The fluorescence integration time is 1 ms per measurement, averaged over 20,000 repetitions. Setting a threshold of 2.5 counts allows the two qubit states to be distinguished in a single shot with measurement fidelity  > 99.5%.

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