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Quantum Cryptography Security

Effect and Compensation of Polarization‐Dependent Loss in Free‐Space Reference Frame Independent Quantum Key Distribution

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Authors: Kyongchun Lim, Byung‐Seok Choi, Ju Hee Baek, Minchul Kim, Joong‐Seon Choe, Kap‐Joong Kim, Dong Churl Kim, Junsang Oh, Chun Ju Youn

Year

2024

Paper ID

11569

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

94

Citations

N/A

Abstract

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.

Why This Paper Matters

  • This paper contributes to the Quantum Cryptography & Security research area in the Quantum Articles archive.
  • It adds a 2024 reference point for readers tracking recent quantum research.
  • Abstract Polarization‐dependent loss (PDL) poses a critical challenge in implementing free‐space quantum key distribution (QKD) systems.

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References & Citation Signals

[1] DOI https://doi.org/10.1002/qute.202400492 [2] Publisher https://doi.org/10.1002/qute.202400492

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