The expression of single photon acquisition probability is deduced from the fundamental-mode Gaussian beam.
基于基模 高斯光束，推导了单光子捕获概率的表达式。
Theoretical model of single photon acquisition probability is established for free-space quantum key distribution.
建立了一种自由空间量子密钥分配的单光子捕获概率理论模型。
Atmospheric turbulence is considered and the expressions of single - photon acquisition probability are modified.
通过考虑大气湍流的影响，对单光子捕获概率的表达式进行了修正。
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