Effect and Compensation of Polarization‐Dependent Loss in Free‐Space Reference Frame Independent Quantum Key Distribution
Abstract Polarization‐dependent loss (PDL) poses a critical challenge in implementing free‐space quantum key distribution (QKD) systems. This study investigated the theoretical and experimental impact of PDL on polarization‐encoded qubits and experimentally demonstrated a method to mitigate these effects. The proposed compensation method could effectively restore the integrity of polarization states, enhancing the robustness and security of QKD systems. Specifically, a secret key rate of 94.01% could be recovered with 5 dB PDL. This study contributes to advancing scalable and secure quantum communication technologies by addressing the critical issue of PDL in QKD systems.
Authors
- Junsang Oh
- Minchul Kim (ORCID: https://orcid.org/0009-0008-1440-0319)
- Byung‐Seok Choi (ORCID: https://orcid.org/0000-0003-3507-7473)
- Kap‐Joong Kim
- Dong Churl Kim
- Kyongchun Lim (ORCID: https://orcid.org/0000-0002-2507-380X)
- Chun Ju Youn (ORCID: https://orcid.org/0000-0003-1885-2925)
- Ju Hee Baek
- Joong‐Seon Choe (ORCID: https://orcid.org/0000-0003-0787-8812)
Institutions
- Electronics and Telecommunications Research Institute (KR)
Publication Details
- Journal
- Advanced Quantum Technologies
- Published
- 2024-12-31
- DOI
- https://doi.org/10.1002/qute.202400492
- Citations
- 1
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 0.35
Funders
- Ministry of Science and ICT, South Korea
- Institute for Information and Communications Technology Promotion