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Quantum Cryptography Security Photonic Quantum Computing

Real-Time Polarization Control for Satellite QKD with Liquid-Crystal Beacon Stabilization

arXiv
Authors: Ondrej Klicnik, Alessandro Zannotti, Yannick Folwill, Oliver de Vries, Petr Munster, Tomas Horvath

Year

2025

Paper ID

36617

Status

Preprint

Abstract Read

~2 min

Abstract Words

68

Citations

N/A

Abstract

Polarization instability is a critical challenge for polarization-entangled satellite quantum key distribution (QKD), where atmospheric effects and platform motion continuously distort photon polarization. To maintain entanglement fidelity, these transformations must be precisely identified and compensated before detection. The channel-induced polarization rotation of a classical reference signal (beacon) is characterized using liquidcrystal variable retarders as a compact and fast polarizationcompensation approach, enabling real-time polarization tracking for satellite QKD links.

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  • This paper contributes to the Photonic Quantum Computing research area in the Quantum Articles archive.
  • It adds a 2025 reference point for readers tracking recent quantum research.
  • Polarization instability is a critical challenge for polarization-entangled satellite quantum key distribution (QKD), where atmospheric effects and platform motion continuously...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2512.11714 [2] arXiv https://arxiv.org/abs/2512.11714 [3] Publisher https://arxiv.org/abs/2512.11714

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