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Quantum-channel capacity of distributing orbital-angular-momentum states for underwater optical quantum communication
Journal of the Optical Society of America A ( IF 1.9 ) Pub Date : 2020-12-09 , DOI: 10.1364/josaa.402794
Shuang Zhai , Jicheng Wang , Yun Zhu , Yixin Zhang , Zheng-Da Hu

We employ non-diffractive Bessel–Gaussian beams to investigate the effect of oceanic turbulence on quantum communication protocols via behaviors of quantum-channel capacity and trace distance, based on the analytical expression of the phase structure function of an orbital-angular-momentum (OAM) beam in underwater wireless optical communication. Our results show that turbulence conditions with a larger inner-scale and outer-scale factors, higher dissipation rate of kinetic energy, lower dissipation rate of the mean-squared temperature, and smaller temperature-salinity contribution ratio are beneficial to quantum communication performance. Moreover, we show that the distribution protocol may be improved by distributing quantum superposition states instead of OAM eigenstates. We believe our work provides the first theoretical exploration of quantum-channel capacity in underwater OAM quantum communication.

中文翻译:

水下光量子通信中分配轨道角动量态的量子通道容量

我们基于轨道角动量(OAM)的相结构函数的解析表达式,采用非衍射贝塞尔-高斯光束通过量子通道容量和迹线距离的行为来研究海洋湍流对量子通信协议的影响。 )水下无线光通信中的光束。我们的结果表明,湍流条件具有更大的内部尺度和外部尺度因子,较高的动能耗散率,较低的均方温度耗散率以及较小的温度-盐度贡献率,这有利于量子通信性能。此外,我们表明可以通过分配量子叠加态而不是OAM本征态来改善分配协议。
更新日期:2020-12-24
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