Proof-of-principle demonstration of semi-quantum key distribution based on the Mirror protocol
Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Information and Optoelectronic Science and Engineering, South China Normal University, 510006, Guangzhou, China
2 Guangdong Polytechnic Institute, Tong Xin Road, 510091, Guangzhou, China
Accepted: 9 December 2021
Published online: 20 December 2021
Semi-quantum key distribution (SQKD) is used to establish a string of shared secret keys between a quantum party and a classical party. Here, we report the first proof-of-principle experimental demonstration of SQKD based on the Mirror protocol, which is the most experimentally feasible SQKD protocol, and equipped with time-phase encoding scheme employing the method of selective modulation. The experiment was performed at a repetition frequency of 62.5 MHz and a high raw key rate arrived at 69.8 kbps, and the average quantum bit error rate was found to be 4.56% and 2.78% for the “SWAP-x-Z” () and the “CTRL-X”, respectively. The results demonstrate the feasibility of our system, and this study is helpful for future research on SQKD experiments.
Key words: Semi-quantum key distribution / Classical operation / Time-phase encoding / Selective modulation
© The Author(s) 2021
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