Figure 3
From: Two-dimensional distributed-phase-reference protocol for quantum key distribution
Secret key rate in real case scenario.
Different secret key rates achievable in a medium-length link scenario, where the detector dead times play an important role. We use mean photon numbers for the different protocols of μDPTS = 0.23, μDPS = 0.19, and μCOW = 0.52, at repetition rate ν = 2 GHz, and average block length of 〈N〉 = 6. The detectors are specified by dark-count probability pd = 2 × 10−8, a dead time of td = 2 μs, and efficiency ηd = 0.1. We assume V = 0.98, and a decoy-sequence probability of pdecoy = 0.02 for COW and DPTS.
