Quantum key distribution system and photonics technology

Lushuai Cao, Wei Luo, Y. X. Wang +20 more

Photonic chip integration would greatly benefit quantum key distribution (QKD) systems for secure communication, in terms of compactness, scalability, and well-established fabrication techniques. This study demonstrates proof of concept for an all-chip measurement-device-independent QKD system using integrated silicon photonic technology. The prototype generates a key rate per pulse of $2.923\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}6}$ over a distance corresponding to 50 km of standard fiber with 25% detection efficiency; the system is projected to be able to work at 120 km with 85% detection efficiency. This technology shows great promise for highly integrated quantum communication networks.

康弘 都倉

Philip Sibson, Alasdair B. Price, Stasja Stanisic +4 more

Zachary Walton, M. Atatuè

Abstract. We analyse the quantitative improvement in performance provided by a novel quantum key distribution (qkd) system that employs a correlated photon source (cps) and a photon-number resolving detector (pnr). Calculations suggest that given current technology, the cps/pnr implementation o � ers an improvement of several orders of magnitude in secure bit rate over previously described implementations. 1.

Zachary Walton, Alexander V. Sergienko, Mete Atatüre +2 more

We analyse the quantitative improvement in performance provided by a novel quantum key distribution (QKD) system that employs a correlated photon source (CPS) and a photon-number resolving detector (PNR). Calculations suggest that given current technology, the CPS/PNR implementation offers an improvement of several orders of magnitude in secure bit rate over previously described implementations.

Darius Bunandar, Nicholas C. Harris, Zheshen Zhang +6 more