In free-space quantum key distribution (QKD) between moving parties, e.g., free-space QKD via satellite, the reference frame rotation and fluctuation degrades the performance of QKD. Reference-frame-independent QKD (RFI-QKD) provides a simple but efficient way to overcome this problem. While there has been a number of theoretical and experimental studies on RFI-QKD, the experimental verification of the robustness of RFI-QKD over other QKD protocols under the reference frame rotation and fluctuation is still missing. Here, we have constructed a free-space QKD system which can implement BB84, six-state, and RFI-QKD protocols, and compared their performances under the reference frame rotation and fluctuation. With the theoretical analysis and experimental data, we have successfully verified the robustness of RFI-QKD protocol over other QKD protocols in the presence of reference frame rotation and fluctuation.
@article{arxiv.1808.05811,
title = {Experimental comparison of various quantum key distribution protocols under reference frame rotation and fuctuation},
author = {Juhwan Yoon and Tanumoy Pramanik and Byung Kwon Park and Sang-Wook Han and Sangin Kim and Yong-Su Kim and Sung Moon},
journal= {arXiv preprint arXiv:1808.05811},
year = {2019}
}