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Practical Performance Analysis of MDI-QKD with Orbital Angular Momentum on UAV Relay Platform
Dan Wu1, Jiahao Li1, Lan Yang2
1Information and Navigation College, Air Force Engineering University, Xi'an 710077, China.
Entropy (Basel, Switzerland)
|August 29, 2024
Summary
Unmanned aerial vehicles (UAVs) enable secure quantum key distribution (QKD) networks. This study introduces a novel protocol using photon orbital angular momentum (OAM) encoding for UAV-based quantum communications, analyzing its performance and limitations.
Area of Science:
- Quantum communication networks
- Free-space optical communication
- Quantum information science
Background:
- Global quantum networks are advancing through integrated terrestrial and satellite quantum key distribution (QKD).
- Unmanned aerial vehicles (UAVs) offer a promising solution to overcome limitations of fiber-based and low-Earth orbit (LEO) satellite quantum links.
- Existing UAV-based QKD protocols face challenges with reference frame alignment and security against untrusted nodes.
Purpose of the Study:
- To propose a measurement-device-independent quantum key distribution (MDI-QKD) protocol utilizing photon orbital angular momentum (OAM) encoding with UAVs as mobile relay platforms.
- To enhance security by leveraging UAV mobility to mitigate threats from untrusted UAVs.
- To analyze the impact of environmental factors and system parameters on the performance of free-space OAM-state transmission for UAV-based QKD.
Main Methods:
- Development of a novel MDI-QKD protocol employing photon OAM encoding for UAV relay systems.
- Investigation of reference frame alignment issues caused by UAV jitter and mitigation through OAM encoding.
- Comprehensive analysis of atmospheric turbulence, state-dependent diffraction (SDD), weather visibility, and pointing errors affecting OAM-state transmission.
- Mathematical modeling to determine the relationship between key generation rate and propagation distance.
Main Results:
- The proposed protocol establishes a secure and efficient quantum link by leveraging UAV mobility.
- Photon OAM encoding effectively addresses reference frame alignment challenges.
- State-dependent diffraction (SDD) was found to significantly reduce the key generation rate, halving previous estimates.
- A maximum channel loss capacity of 26 dB was identified for the UAV relay platform.
Conclusions:
- The study provides a robust framework for deploying UAV-based quantum communication systems.
- Realistic performance parameters for UAV relay platforms in free-space QKD were established.
- The findings pave the way for practical implementation strategies in advanced quantum networks.
Keywords:
MDI-QKDatmospheric turbulenceorbital angular momentumstate-dependent diffractionunmanned aerial vehiclesweather visibilityMore Related Videos
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