Infrared and Laser Engineering, Volume. 53, Issue 8, 20240210(2024)
Simulation study on fluctuation characteristics of channel transmittance for free-space continuous-variable quantum key distribution quantum
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![Sketch of free space continuous-variable quantum key distribution[24] (AWG is the Arbitrary Waveform Generation, and the splitter holds the same transmittance \begin{document}$ \eta $\end{document} as that of free space quantum channel)](/Images/icon/loading.gif){kind=icon}
Fig. 1. Sketch of free space continuous-variable quantum key distribution[24] (AWG is the Arbitrary Waveform Generation, and the splitter holds the same transmittance
Fig. 2. Comparison of the Kolmogorov spectrum model (K_Model) and the modified Von Karman spectrum model (MVK_Model)
Fig. 3. Numerical simulations of free space quantum channel with split-step transmission combined with phase screen flat panel method
Fig. 4. Numerical simulation results associated with transmittances of free space quantum channels based on the Kolmogorov spectrum model (K_Model) and the modified Von Karman spectrum model (MVK_Model) under various atmospheric turbulence conditions
Fig. 5. Comparison of the statistical probability density of free space quantum channel transmittance based on the numerical simulation results and the existing analytical models under (a) weak turbulence and (b) moderate turbulence
Table 1. Parameters during free space quantum channel simulations
View tableView in ArticleTable 1. Parameters during free space quantum channel simulations
Parameter Weak Moderate Structure constant $ {C}_{n}^{2}/{\mathrm{m} }^{-2/3} $ $ 5\times {10}^{-15} $ $ 1.5\times {10}^{-14} $ Outer scale $ {L}_{0}/\mathrm{m} $ 80 80 Inner scale $ {l}_{0}/\mathrm{m} $ $ {10}^{-3} $ $ {10}^{-3} $ Beam-spot radius at the transmitter $ {W}_{0}/\mathrm{c}\mathrm{m} $ 2 2 wavelength $ {\lambda }_{\mathrm{b}\mathrm{e}\mathrm{a}\mathrm{m}}/\mathrm{n}\mathrm{m} $ 809 809 Distance $ L/\mathrm{m} $ 2000 2000 Rytov variance $ {R}_{v} $ 0.75 2.27
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Zhigeng WU, Ming LI, Zhenghao YAO, Tianyi WANG. Simulation study on fluctuation characteristics of channel transmittance for free-space continuous-variable quantum key distribution quantum[J]. Infrared and Laser Engineering, 2024, 53(8): 20240210
Paper Information
Category: Quantum optics
Received: May. 16, 2024
Accepted: --
Published Online: Oct. 29, 2024
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