Tight scaling of key rate for differential-phase-shift quantum key
distribution
Tight scaling of key rate for differential-phase-shift quantum key
distribution
The performance of quantum key distribution (QKD) protocols is evaluated based on the ease of implementation and key generation rate. Among major protocols, the differential-phase-shift (DPS) protocol has the advantage of simple implementation using a train of coherent pulses and a passive detection unit. Unfortunately, however, its key rate is …