Details

Autor(en) / Beteiligte

• Liang, Wen-Ye
• Wang, Shuang
• Li, Hong-Wei
• Yin, Zhen-Qiang
• Chen, Wei
• Yao, Yao
• Huang, Jing-Zheng
• Guo, Guang-Can
• Han, Zheng-Fu

Titel

Proof-of-principle experiment of reference-frame-independent quantum key distribution with phase coding

Ist Teil von

• Scientific reports, 2014-01, Vol.4 (1), p.3617-3617, Article 3617

Ort / Verlag

England: Nature Publishing Group

Erscheinungsjahr

2014

Link zum Volltext

Quelle

EZB-FREE-00999 freely available EZB journals

Beschreibungen/Notizen

• We have demonstrated a proof-of-principle experiment of reference-frame-independent phase coding quantum key distribution (RFI-QKD) over an 80-km optical fiber. After considering the finite-key bound, we still achieve a distance of 50 km. In this scenario, the phases of the basis states are related by a slowly time-varying transformation. Furthermore, we developed and realized a new decoy state method for RFI-QKD systems with weak coherent sources to counteract the photon-number-splitting attack. With the help of a reference-frame-independent protocol and a Michelson interferometer with Faraday rotator mirrors, our system is rendered immune to the slow phase changes of the interferometer and the polarization disturbances of the channel, making the procedure very robust.