Open AccessPerformance analysis of decoy state quantum key distribution using two kinds of photon sources
Author(s) -
Han Wang,
Lianshan Yan,
Wei Pan,
Bin Luo,
Guo Zhang,
M. Xu
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.030304
Subject(s) - quantum key distribution , photon , transmission (telecommunications) , physics , key (lock) , quantum information science , computer science , single photon source , key generation , bit error rate , quantum , coherent states , transmission rate , optics , telecommunications , quantum mechanics , algorithm , channel (broadcasting) , quantum entanglement , computer security , cryptography
Since the single photon is easy to attenuate and be disturbed, its key generation rate and transmission distance in quantum communication systems are generally limited. In contrast, weak coherent pulse (WCP) and heralded single photon source (HSPS) exhibit higher feasibility than the single photon source in quantum key distributions (QKD). We compare the performances of QKD using these two kinds of photon sources and decoy state method, incorporating data-postprocessing methods including the Lütkenhaus scheme and Gottesman-Lo-Lütkenhaus- Preskill (GLLP) scheme. Simulation results indicate that QKD using HSPS can transmit longer distance than using WCP with lower overall quantum bit error rate (QBER) at the same transmission distance, albeit with relatively low key generation rate.