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Free-space quantum links under diverse weather conditions
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Free-space quantum links under diverse weather conditions
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Free-space optical communication links are promising channels for establishing secure quantum communication. Here we study the transmission of nonclassical light through a turbulent atmospheric link under diverse weather conditions, including rain or haze. To include these effects, the theory of light transmission through atmospheric links in the elliptic-beam approximation presented by Vasylyev et al. [D. Vasylyev et al., Phys. Rev. Lett. 117, 090501 (2016); arXiv:1604.01373] is further generalized.It is demonstrated, with good agreement between theory and experiment, that low-intensity rain merely contributes additional deterministic losses, whereas haze also introduces additional beam deformations of the transmitted light. Based on these results, we study theoretically the transmission of quadrature squeezing and Gaussian entanglement under these weather conditions.
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Cited by 1 Pith paper
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Quantum advantage prediction in turbulent free-space quantum illumination
Kolmogorov-Arnold networks trained on meteorological data from diverse sites predict the degradation of quantum advantage in turbulent quantum illumination channels.
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