Table 3 Experimental results of the L = 3 RRDPS system

From: Improved security bound for the round-robin-differential-phase-shift quantum key distribution

l (km)

Q s

E s

Q d

E d

Q v

R 1

R 2

30

3.18 × 10−4

2.32%

4.20 × 10−6

50

3.24 × 10−3

1.76%

7.52 × 10−4

1.95%

1.12 × 10−5

8.14 × 10−5

3.60 × 10−4

100

3.28 × 10−4

2.26%

7.86 × 10−5

4.01%

4.50 × 10−6

4.98 × 10−6

3.15 × 10−5

140

5.52 × 10−5

4.99%

1.56 × 10−5

13.31%

3.87 × 10−6

1.45 × 10−6

  1. List of mean yields and error rates of signal (Qs and Es), decoy (Qd and Ed), and mean yield of “vacuum” (Qv) packets, secret key rates per pulse (R1 and R2) for four lengths of the fiber channel (l), where R1 is calculated without using the error rate while R2 is calculated with using the error rate. At 30 km, the decoy states method is not employed, so Qs and Es represent the yield per packet and error rate of all key bits, respectively