Fig. 2: Measurement results.
a Time-resolved coincidences between photonic detection events of one of the detectors (readout base A0) and bright events of the atomic state readout from both orthogonal states of the readout base B0. The oscillations with the Larmor frequency of the atomic qubit stem from the time-dependency of the entangled state. b The average Bell parameter in dependence of the detection time. For the further analysis we select coincidences at the detection times which correspond to a Larmor phase of ωL t = π resulting in the Ψ− Bell state. To obtain a feasible SBR, we only select concidences in time windows around the first two maxima, whose positions were determined from an independent measurement. c The optimal Bell value is a tradeoff between number of detected events (favouring large time windows) and phase resolution (favouring small time windows). d Bell value after QFC after a certain number of measurement runs based on the coincidences from the optimal time window.
