Abstract
Quantum satellite communication has advantages of reliability and unconditional safety; it is very important in the field of national military security. When quantum signals are transmitted over a free-space channel, various environmental factors will unavoidably influence quantum communication performance, such as clouds, aerosol particles, and rainfall. However, up to now, research on the impact of bioaerosols on the performance of quantum satellite communication in free space has not been carried out. Therefore, in this work, we experimentally simulate the fractal structure of microbial agglomerated particles by a cluster–cluster model. Since microbial agglomerated particles are suspending in the air, they have an energy-absorbing effect on quantum light signals, which is called the extinction effect. We calculate the extinction efficiency factors by discrete dipole approximation. Based on the particle-size distribution function and the extinction coefficient of microbial agglomerated particles, we respectively establish relationships between the particle concentration, quantum link attenuation, channel capacity, and channel survival functions, as well as bit error rates for the bit-flip channel and the depolarized channel. Our simulation results show that different concentrations of microbial agglomerated particles have different effects on the performance of quantum communication, which provide a reference for the adjustment of quantum communication parameters in microbial environment.
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Zhang, X., Zhou, L. & Zhai, M. Influence of Microbial Agglomerated Particles on the Performance of Free-Space Quantum Communication. J Russ Laser Res 42, 473–483 (2021). https://doi.org/10.1007/s10946-021-09985-y
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DOI: https://doi.org/10.1007/s10946-021-09985-y