水下自由空间量子密钥分发的可行性
Feasibility of underwater free space quantum key distribution
摘要：
研究了水下介质的光吸收和散射特性，并建立了水下自由空间量子密钥分发（QKD）信道模型。利用矢量辐射转移理论和蒙特卡罗方法，得到了水下量子通信中光子的衰减、散射光子的保真度、量子误码率和筛选密钥生成率。从模拟结果可以看出，最安全的单光子水下自由空间量子密钥分配在最清澈的海水中是可行的。
英文摘要：
We investigate the optical absorption and scattering properties of underwater media pertinent to our underwater free space quantum key distribution (QKD) channel model. With the vector radiative transfer theory and Monte Carlo method, we obtain the attenuation of photons, the fidelity of the scattered photons, the quantum bit error rate and the sifted key generation rate of underwater quantum communication. It can be observed from our simulations that the most secure single photon underwater free space QKD is feasible in the clearest ocean water.
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