Abstract：
: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.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Liang WY,Wang S,Li HW,Yin ZQ,Chen W,Yao Y,Huang JZ,Guo GC,Han ZFdoi
10.1038/srep03617subject
Has Abstractpub_date
2014-01-09 00:00:00pages
3617issn
2045-2322pii
srep03617journal_volume
4pub_type
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