Fig. 6: Fidelity and SBR vs. SPDC pump power for the four configurations of Fig. 5.
From: Telecom quantum photonic interface for a 40Ca+ single-ion quantum memory
a, b Show the measurement results for a detection time window of 1.5τmean which corresponds to 78% of the photon temporal shape. In (a) the non background corrected MLE results are represented by the data points, the dot-dashed line shows the mean background corrected fidelity, while the dashed line shows the theoretical expectation according to Eq. (5). The uncertainties are derived from a simulation; see “Method” section for further details. b Shows the comparison of the SBR for the four different measurement settings. The dashed line is calculated for the given pair rate according to Eq. (4). The error bars are calculated by including the \(\sqrt{N}\)-noise of the measured coincidences59. c, d Show the results when choosing a larger detection window of 5τmean for the evaluation.
