Tomographic Approach in Reference-Frame-Independent Measurement-Device-Independent Quantum Key Distribution

Qinyu Xue, Rongzhen Jiao

Qian Li, Changhua Zhu, Shuquan Ma +2 more

Chen Dong, Wei Li, Yaliang Che +2 more

Kaibiao Qin, Xin Liu, Zhicheng Luo +3 more

Xi Fang, Chao Wang, Yun-Guang Han +3 more

Abstract Recently, a novel reference-frame-independent measurement-device-independent quantum key distribution protocol was proposed, which can remove all detector side channels as well as tolerate unknown and slow variance of reference frame without active alignment. In this paper, we propose a new tomographic method to estimate the key rate in that protocol. We estimate the key rate using conventional method and tomographic method respectively and compare the two methods by numerical simulation. The numerical simulation results show that tomographic approach is equivalent to the conventional approach, which can be used as an alternative method.

Wen-Yuan Gu, Shanghong Zhao, Chen Dong +2 more

Reference-frame-independent measurement-device-independent quantum key distribution is adopted to avoid aligning the reference frames in realistic setup, which can guarantee the system security against the slow drift of reference frame. However, the relative motion of reference frame including deviation and fluctuation can influence the performance of reference-frame-independent measurement-device-independent quantum key distribution in practical experimental demonstration. In this paper, taking finite effect into consideration, the performance of reference-frame-independent measurement-device-independent quantum key distribution with biased bases under reference frame deviation and fluctuation is presented to evaluate the effect of the relative motion of reference frame on our scheme, which makes the analysis conform to reality. Our simulation results imply that the key rates fluctuate periodically with the reference frame rotating, while declining with the reference frame fluctuation increasing.