Table 1 Experimental parameters and the measured signal-to-noise ratios
From: Deterministic entanglement-assisted quantum communication over 20 km fiber channel
Distance (km) | Total efficiency | Excess noise | Phase fluctuation | SNRx (dB) | SNRp (dB) |
|---|---|---|---|---|---|
0.002 | 78% | 0.007 | 1.01° | 3.71 | 3.63 |
2.017 | 71% | 0.010 | 1.52° | 3.02 | 3.11 |
5.043 | 62% | 0.011 | 1.70° | 2.61 | 2.59 |
10.074 | 49% | 0.013 | 2.21° | 1.80 | 1.73 |
20.121 | 31% | 0.016 | 2.45° | 0.92 | 0.96 |
