Figure6

Figure 6. The SKR, QBER, Visibility and Total Detection Count measurement over a period of 10 days. (A) The recorded SKR over time, with an average SKR of 2, 392 bps (indicated by the red dotted line); (B) the recorded QBER over time, with an average QBER of 1.9% (indicated by a red dotted line) and all the recorded QBER is less than 6%; (C) the Dcc Visibility recorded over time, with an average of 99.12% (indicated by a red dotted line); (D) the Total Detection Count recorded over time, with an average of 18, 199 (indicated by a red dotted line). SKR: Secret key rate; QBER: quantum bit error rate; Dcc: dark-count corrected.