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LEO small satellite QKD downlink performance: QuantSat-PT case study

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arxiv 2209.10293 v1 pith:MOPUEMK4 submitted 2022-09-21 quant-ph

Vladlen Galetsky , Manfred Niehus This is my paper · ORCID
classification quant-ph
keywords downlinkmissionperformancesatellitebb84experimentalorbitprotocol
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abstract

In this work, we model and simulate the performance of a quantum key distribution (QKD) downlink from a low earth orbit (LEO) small satellite to an optical ground station (OGS), as integral part of the concept and preliminary design phase of the QuantSat-PT mission. By modelling and simulating in detail downlink transmission channel effects, with emphasis on turbulent and atmospheric losses for BB84 and E91 protocols, we find a consistent set of values for the performance envelope that resolves ambiguities of mission experimental data that had been reported previous to this work. We obtain for the 4-state BB84 protocol a sifted key rate and Quantum Bit Error Rate (QBER) of 32.1 kbit/s and $4\%$, respectively, for zenith at 750 km orbit. For the E91 protocol the Clauser, Horne, Shimony and Holt (CHSH) test was performed resulting in a correlation factor of $S \in[-2.63\pm0.02,-1.91\pm0.03]$ for the mission. The consistency of these results with the state of the art simulators and its relevance on experimental satellite based QKD is discussed.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Modeling Optical Key Distribution over a Satellite-to-Ground Link Under Weak Atmospheric Turbulence

    physics.optics 2025-08 unverdicted novelty 4.0 of 10

    A LEO-to-ground IM/DD optical key distribution link under weak turbulence achieves a secret key capacity that depends on reconciliation direction, code efficiency, and wind-strength-dependent fluctuations.

  2. Finite and Asymptotic Key Analysis for CubeSat-Based BB84 QKD with Elliptical Beam Approximation

    quant-ph 2025-01 conditional novelty 4.0 of 10

    For CubeSat downlink QKD modeled with an elliptical beam channel, efficient BB84 consistently beats standard BB84 in both finite-size and asymptotic key rates.

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