Park, Chang Hoon Woo, Min Ki Park, Byung Kwon Lee, Min Soo Kim, Yong-Su Cho, Young-Wook Kim, Sangin Han, Sang-Wook Moon, Sung 2024-01-19T21:34:34Z 2024-01-19T21:34:34Z 2021-09-03 2018-10 2169-3536 https://pubs.kist.re.kr/handle/201004/120880 We have implemented a practical plug-and-play measurement-device-independent quantum key distribution (MDI QKD) system with polarization division multiplexing (PDM). MDI QKD is known as a secure protocol that can inherently prevent detection loopholes. Significant efforts have been made toward implementing MDI QKD systems. Recently, a plug-and-play architecture has been proposed for implementing the MDI QKD system, and its feasibility has been experimentally verified in both free space and fiber channel. However, in order to apply it to the real world, it is necessary to develop a more practical architecture including multiplexing methods and self-compensation techniques. In this paper, we have proposed and implemented a practical plug-and-play MDI QKD architecture that can be implemented regardless of whether the quantum channel lengths of Alice and Bob are symmetric or asymmetric using PDM and can be operated even under ambient-temperature-changing environments through an optical path-length self-compensation technique. Experimentally, we have achieved 6.25 x 10(-6) bits per pulse as the key rate and the quantum bit error rates under 3% on 25-km quantum channels. English IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC UNCONDITIONAL SECURITY Practical Plug-and-Play Measurement-Device-Independent Quantum Key Distribution With Polarization Division Multiplexing Article 10.1109/ACCESS.2018.2874028 1 IEEE ACCESS, v.6, pp.58587 - 58593 IEEE ACCESS 6 58587 58593 scie scopus 000449541900001 2-s2.0-85054547584 Computer Science, Information Systems Engineering, Electrical & Electronic Telecommunications Computer Science Engineering Telecommunications Article UNCONDITIONAL SECURITY Quantum cryptography measurement-device-independent plug-and-play polarization division multiplexing optical path-length self-compensation