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Airborne Quantum Key Distribution Performance Analysis under Supersonic Boundary Layer.

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Airborne quantum key distribution (QKD) faces reduced photon rates due to aircraft boundary layers (BL). Supersonic BL significantly degrades secure key rates by over 60%, impacting high-speed QKD realization.

Keywords:
airborneboundary layerquantum key distribution

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Area of Science:

  • Quantum communication
  • Aerospace engineering
  • Optics

Background:

  • Airborne quantum key distribution (QKD) is crucial for integrated communication networks.
  • Aircraft boundary layers (BL) at speeds above Mach 0.3 randomly reduce photon transmission rates.
  • Understanding BL effects is vital for reliable airborne QKD.

Purpose of the Study:

  • To investigate the impact of boundary layer (BL) effects on airborne quantum key distribution (QKD) performance.
  • To model and simulate airborne QKD under subsonic and supersonic BL conditions.
  • To provide theoretical guidance for high-speed airborne QKD.

Main Methods:

  • Developed a model to simulate airborne QKD performance considering BL effects.
  • Incorporated experimental data of supersonic BL into the simulation model.
  • Compared QKD performance under various flight conditions and BL types.

Main Results:

  • Complex turbulence in supersonic BL causes random beam deflection and photon redistribution.
  • Subsonic BL reduces secure key rate by approximately 35.8%.
  • Supersonic BL reduces secure key rate by approximately 62.5%.

Conclusions:

  • Boundary layer turbulence significantly degrades airborne QKD performance, especially at supersonic speeds.
  • High-speed airborne QKD faces substantial challenges due to atmospheric turbulence.
  • This research offers theoretical insights for developing robust high-speed airborne QKD systems.